git.libre-soc.org Git

d: Use memset to fill alignment holes with zeroes.

This patch removes the manual insertion of padding for fields in
constructed struct literals, and instead uses memset() on the
declaration being initialized.

When compiling optimized builds, the intent is usually missed, and
alignment holes end up with non-zero values in them anyway.

gcc/d/ChangeLog:

PR d/94424
* d-codegen.cc (build_alignment_field): Remove.
(build_struct_literal): Don't insert alignment padding.
* expr.cc (ExprVisitor::visit (AssignExp *)): Call memset before
assigning struct literals.

gcc/testsuite/ChangeLog:

PR d/94424
* gdc.dg/pr94424.d: New test.

vect: ICE: in vectorizable_load, at tree-vect-stmts.c:9173 [PR94398]

In the testcase for PR94398, we're trying to compute:

 alignment_support_scheme
 = vect_supportable_dr_alignment (first_dr_info, false);
 gcc_assert (alignment_support_scheme);

even for VMAT_GATHER_SCATTER, which always accesses individual elements.
Here we should set alignment_support_scheme to dr_unaligned_supported
the gather/scatter case instead of calling vect_supportable_dr_alignment.

2020-03-31 Felix Yang <felix.yang@huawei.com>

gcc/
PR tree-optimization/94398
* tree-vect-stmts.c (vectorizable_store): Instead of calling
vect_supportable_dr_alignment, set alignment_support_scheme to
dr_unaligned_supported for gather-scatter accesses.
(vectorizable_load): Likewise.

gcc/testsuite/
PR tree-optimization/94398
* gcc.target/aarch64/pr94398.c: New test.

Library-side tests for parenthesized aggregate init

PR c++/92878
PR c++/92947

* testsuite/20_util/allocator_traits/members/92878_92947.cc: New.
* testsuite/20_util/any/assign/92878_92947.cc: Likewise.
* testsuite/20_util/any/cons/92878_92947.cc: Likewise.
* testsuite/20_util/is_constructible/92878_92947.cc: Likewise.
* testsuite/20_util/optional/assignment/92878_92947.cc: Likewise.
* testsuite/20_util/optional/cons/92878_92947.cc: Likewise.
* testsuite/20_util/pair/cons/92878_92947.cc: Likewise.
* testsuite/20_util/shared_ptr/creation/92878_92947.cc: Likewise.
* testsuite/20_util/specialized_algorithms/construct_at/92878_92947.cc:
Likewise.
* testsuite/20_util/unique_ptr/creation/92878_92947.cc: Likewise.
* testsuite/20_util/uses_allocator/92878_92947.cc: Likewise.
* testsuite/20_util/variant/92878_92947.cc: Likewise.
* testsuite/23_containers/deque/modifiers/emplace/92878_92947.cc:
Likewise.
* testsuite/23_containers/forward_list/modifiers/92878_92947.cc:
Likewise.
* testsuite/23_containers/list/modifiers/emplace/92878_92947.cc:
Likewise.
* testsuite/23_containers/map/modifiers/emplace/92878_92947.cc:
Likewise.
* testsuite/23_containers/multimap/modifiers/emplace/92878_92947.cc:
Likewise.
* testsuite/23_containers/multiset/modifiers/emplace/92878_92947.cc:
Likewise.
* testsuite/23_containers/priority_queue/92878_92947.cc: Likewise.
* testsuite/23_containers/queue/92878_92947.cc: Likewise.
* testsuite/23_containers/set/modifiers/emplace/92878_92947.cc:
Likewise.
* testsuite/23_containers/stack/92878_92947.cc: Likewise.
* testsuite/23_containers/unordered_map/modifiers/92878_92947.cc:
Likewise.
* testsuite/23_containers/unordered_multimap/modifiers/92878_92947.cc:
Likewise.
* testsuite/23_containers/unordered_multiset/modifiers/92878_92947.cc:
Likewise.
* testsuite/23_containers/unordered_set/modifiers/92878_92947.cc:
Likewise.
* testsuite/23_containers/vector/modifiers/emplace/92878_92947.cc:
Likewise.

d: Use d_comdat_linkage on generated internal decl.

This adds weak linkage to internal TypeInfo data on top of the existing
DECL_COMDAT, which helps in the unlikely event that two of the same
TypeInfo data ends up in multiple places.

gcc/d/ChangeLog:

* typeinfo.cc (TypeInfoVisitor::internal_reference): Call
d_comdat_linkage on generated decl.

amdgcn: generalize vector insn modes

Replace all relevant explicit uses of V64 vectors with an iterator (albeit
with only one entry). This is prerequisite to adding extra vector lengths.

The changes are purely mechanical: comparing the mddump files from before
and after shows only white-space differences and the use of GET_MODE_NUNITS.

2020-03-31 Andrew Stubbs <ams@codesourcery.com>

gcc/
* config/gcn/gcn-valu.md (V_QI, V_HI, V_HF, V_SI, V_SF, V_DI, V_DF):
New mode iterators.
(vnsi, VnSI, vndi, VnDI): New mode attributes.
(mov<mode>): Use <VnDI> in place of V64DI.
(mov<mode>_exec): Likewise.
(mov<mode>_sgprbase): Likewise.
(reload_out<mode>): Likewise.
(*vec_set<mode>_1): Use GET_MODE_NUNITS instead of constant 64.
(gather_load<mode>v64si): Rename to ...
(gather_load<mode><vnsi>): ... this, and use <VnSI> in place of V64SI,
and <VnDI> in place of V64DI.
(gather<mode>_insn_1offset<exec>): Use <VnDI> in place of V64DI.
(gather<mode>_insn_1offset_ds<exec>): Use <VnSI> in place of V64SI.
(gather<mode>_insn_2offsets<exec>): Use <VnSI> and <VnDI>.
(scatter_store<mode>v64si): Rename to ...
(scatter_store<mode><vnsi>): ... this, and use <VnSI> and <VnDI>.
(scatter<mode>_expr<exec_scatter>): Use <VnSI> and <VnDI>.
(scatter<mode>_insn_1offset<exec_scatter>): Likewise.
(scatter<mode>_insn_1offset_ds<exec_scatter>): Likewise.
(scatter<mode>_insn_2offsets<exec_scatter>): Likewise.
(ds_bpermute<mode>): Use <VnSI>.
(addv64si3_vcc<exec_vcc>): Rename to ...
(add<mode>3_vcc<exec_vcc>): ... this, and use V_SI.
(addv64si3_vcc_dup<exec_vcc>): Rename to ...
(add<mode>3_vcc_dup<exec_vcc>): ... this, and use V_SI.
(addcv64si3<exec_vcc>): Rename to ...
(addc<mode>3<exec_vcc>): ... this, and use V_SI.
(subv64si3_vcc<exec_vcc>): Rename to ...
(sub<mode>3_vcc<exec_vcc>): ... this, and use V_SI.
(subcv64si3<exec_vcc>): Rename to ...
(subc<mode>3<exec_vcc>): ... this, and use V_SI.
(addv64di3): Rename to ...
(add<mode>3): ... this, and use V_DI.
(addv64di3_exec): Rename to ...
(add<mode>3_exec): ... this, and use V_DI.
(subv64di3): Rename to ...
(sub<mode>3): ... this, and use V_DI.
(subv64di3_exec): Rename to ...
(sub<mode>3_exec): ... this, and use V_DI.
(addv64di3_zext): Rename to ...
(add<mode>3_zext): ... this, and use V_DI and <VnSI>.
(addv64di3_zext_exec): Rename to ...
(add<mode>3_zext_exec): ... this, and use V_DI and <VnSI>.
(addv64di3_zext_dup): Rename to ...
(add<mode>3_zext_dup): ... this, and use V_DI and <VnSI>.
(addv64di3_zext_dup_exec): Rename to ...
(add<mode>3_zext_dup_exec): ... this, and use V_DI and <VnSI>.
(addv64di3_zext_dup2): Rename to ...
(add<mode>3_zext_dup2): ... this, and use V_DI and <VnSI>.
(addv64di3_zext_dup2_exec): Rename to ...
(add<mode>3_zext_dup2_exec): ... this, and use V_DI and <VnSI>.
(addv64di3_sext_dup2): Rename to ...
(add<mode>3_sext_dup2): ... this, and use V_DI and <VnSI>.
(addv64di3_sext_dup2_exec): Rename to ...
(add<mode>3_sext_dup2_exec): ... this, and use V_DI and <VnSI>.
(<su>mulv64si3_highpart<exec>): Rename to ...
(<su>mul<mode>3_highpart<exec>): ... this and use V_SI and <VnDI>.
(mulv64di3): Rename to ...
(mul<mode>3): ... this, and use V_DI and <VnSI>.
(mulv64di3_exec): Rename to ...
(mul<mode>3_exec): ... this, and use V_DI and <VnSI>.
(mulv64di3_zext): Rename to ...
(mul<mode>3_zext): ... this, and use V_DI and <VnSI>.
(mulv64di3_zext_exec): Rename to ...
(mul<mode>3_zext_exec): ... this, and use V_DI and <VnSI>.
(mulv64di3_zext_dup2): Rename to ...
(mul<mode>3_zext_dup2): ... this, and use V_DI and <VnSI>.
(mulv64di3_zext_dup2_exec): Rename to ...
(mul<mode>3_zext_dup2_exec): ... this, and use V_DI and <VnSI>.
(<expander>v64di3): Rename to ...
(<expander><mode>3): ... this, and use V_DI and <VnSI>.
(<expander>v64di3_exec): Rename to ...
(<expander><mode>3_exec): ... this, and use V_DI and <VnSI>.
(<expander>v64si3<exec>): Rename to ...
(<expander><mode>3<exec>): ... this, and use V_SI and <VnSI>.
(v<expander>v64si3<exec>): Rename to ...
(v<expander><mode>3<exec>): ... this, and use V_SI and <VnSI>.
(<expander>v64si3<exec>): Rename to ...
(<expander><vnsi>3<exec>): ... this, and use V_SI.
(subv64df3<exec>): Rename to ...
(sub<mode>3<exec>): ... this, and use V_DF.
(truncv64di<mode>2): Rename to ...
(trunc<vndi><mode>2): ... this, and use <VnDI>.
(truncv64di<mode>2_exec): Rename to ...
(trunc<vndi><mode>2_exec): ... this, and use <VnDI>.
(<convop><mode>v64di2): Rename to ...
(<convop><mode><vndi>2): ... this, and use <VnDI>.
(<convop><mode>v64di2_exec): Rename to ...
(<convop><mode><vndi>2_exec): ... this, and use <VnDI>.
(vec_cmpv64qidi): Rename to ...
(vec_cmp<mode>di): ... this, and use <VnSI>.
(vec_cmpv64qidi_exec): Rename to ...
(vec_cmp<mode>di_exec): ... this, and use <VnSI>.
(vcond_mask_<mode>di): Use <VnDI>.
(maskload<mode>di): Likewise.
(maskstore<mode>di): Likewise.
(mask_gather_load<mode>v64si): Rename to ...
(mask_gather_load<mode><vnsi>): ... this, and use <VnSI> and <VnDI>.
(mask_scatter_store<mode>v64si): Rename to ...
(mask_scatter_store<mode><vnsi>): ... this, and use <VnSI> and <VnDI>.
(*<reduc_op>_dpp_shr_v64di): Rename to ...
(*<reduc_op>_dpp_shr_<mode>): ... this, and use V_DI and <VnSI>.
(*plus_carry_in_dpp_shr_v64si): Rename to ...
(*plus_carry_in_dpp_shr_<mode>): ... this, and use V_SI.
(*plus_carry_dpp_shr_v64di): Rename to ...
(*plus_carry_dpp_shr_<mode>): ... this, and use V_DI and <VnSI>.
(vec_seriesv64si): Rename to ...
(vec_series<mode>): ... this, and use V_SI.
(vec_seriesv64di): Rename to ...
(vec_series<mode>): ... this, and use V_DI.

arc: Update operand printing

Use HOST_WIDE_INT_PRINT_DEC macro instead of %ld for format printing.

gcc/
xxxx-xx-xx Claudiu Zissulescu <claziss@synopsys.com>

* config/arc/arc.c (arc_print_operand): Use
HOST_WIDE_INT_PRINT_DEC macro.

arc: Cleanup compilation warning

gcc/
xxxx-xx-xx Claudiu Zissulescu <claziss@synopsys.com>

* config/arc/arc.h (ASM_FORMAT_PRIVATE_NAME): Fix it.

[ARM][PATCH]: Add MVE ACLE intrinsics vbicq_n_* polymorphic variant support.

For the following MVE ACLE intrinsics, polymorphic variant support is missing on the trunk.

vbicq_n_s16, vbicq_n_s32, vbicq_n_u16 and vbicq_n_u32.

This patch add the polymorphic variant support for above intrinsics.

Please refer to M-profile Vector Extension (MVE) intrinsics [1] for more details.
[1] https://developer.arm.com/architectures/instruction-sets/simd-isas/helium/mve-intrinsics

2020-03-31 Srinath Parvathaneni <srinath.parvathaneni@arm.com>

* config/arm/arm_mve.h (vbicq): Define MVE intrinsic polymorphic
variant.
(__arm_vbicq): Likewise.

2020-03-31 Srinath Parvathaneni <srinath.parvathaneni@arm.com>

* gcc.target/arm/mve/intrinsics/vbicq_n_s16.c: Modify.
* gcc.target/arm/mve/intrinsics/vbicq_n_s32.c: Likewise.
* gcc.target/arm/mve/intrinsics/vbicq_n_u16.c: Likewise.
* gcc.target/arm/mve/intrinsics/vbicq_n_u32.c: Likewise.

arc: Allow more ABIs in GLIBC_DYNAMIC_LINKER

Enable big-endian suffixed dynamic linker per glibc multi-abi support.

And to avoid a future churn and version pairingi hassles, also allow
arc700 although glibc for ARC currently doesn't support it.

gcc/
xxxx-xx-xx Vineet Gupta <vgupta@synopsys.com>

* config/arc/linux.h: GLIBC_DYNAMIC_LINKER support BE/arc700

[ARM][PATCH]: Add support for MVE ACLE intrinsics polymorphic variants for +mve.fp option.

For the following MVE ACLE intrinsics, polymorphic variant supports only +mve option, support for +mve.fp is missing.

vabavq_p_s16, vabavq_p_s32, vabavq_p_s8, vabavq_p_u16, vabavq_p_u32, vabavq_p_u8, vabavq_s16, vabavq_s32, vabavq_s8, vabavq_u16, vabavq_u32, vabavq_u8, vaddlvaq_p_s32, vaddlvaq_p_u32, vaddlvaq_s32, vaddlvaq_u32, vaddlvq_p_s32, vaddlvq_p_u32, vaddlvq_u32, vaddvaq_p_s16, vaddvaq_p_s32, vaddvaq_p_s8, vaddvaq_p_u16, vaddvaq_p_u32, vaddvaq_p_u8, vaddvaq_s16, vaddvaq_s32, vaddvaq_s8, vaddvaq_u16, vaddvaq_u32, vaddvaq_u8, vaddvq_p_s16, vaddvq_p_s32, vaddvq_p_s8, vaddvq_p_u16, vaddvq_p_u32, vaddvq_p_u8, vaddvq_s8, vaddvq_u16, vaddvq_u32, vaddvq_u8, vcmpcsq_m_n_u16, vcmpcsq_m_n_u32, vcmpcsq_m_n_u8, vcmpcsq_m_u16, vcmpcsq_m_u32, vcmpcsq_m_u8, vcmpcsq_n_u16, vcmpcsq_n_u32, vcmpcsq_n_u8, vcmpcsq_u16, vcmpcsq_u32, vcmpcsq_u8, vcmpeqq_n_f16, vcmpeqq_n_f32, vcmpgeq_m_n_s16, vcmpgeq_m_n_s32, vcmpgeq_m_n_s8, vcmpgtq_m_n_f16, vcmpgtq_m_n_f32, vcmpgtq_n_f16, vcmpgtq_n_f32, vcmphiq_m_n_u16, vcmphiq_m_n_u32, vcmphiq_m_n_u8, vcmphiq_m_u16, vcmphiq_m_u32, vcmphiq_m_u8, vcmphiq_n_u16, vcmphiq_n_u32, vcmphiq_n_u8, vcmphiq_u16, vcmphiq_u32, vcmphiq_u8, vcmpleq_m_n_f16, vcmpleq_m_n_f32, vcmpleq_n_f16, vcmpleq_n_f32, vcmpltq_m_n_f16, vcmpltq_m_n_f32, vcmpneq_m_n_f16, vcmpneq_m_n_f32, vcmpneq_n_f16, vcmpneq_n_f32, vmaxavq_p_s16, vmaxavq_p_s32, vmaxavq_p_s8, vmaxavq_s16, vmaxavq_s32, vmaxavq_s8, vmaxq_x_s16, vmaxq_x_s32, vmaxq_x_s8, vmaxq_x_u16, vmaxq_x_u32, vmaxq_x_u8, vmaxvq_p_s16, vmaxvq_p_s32, vmaxvq_p_s8, vmaxvq_p_u16, vmaxvq_p_u32, vmaxvq_p_u8, vmaxvq_s16, vmaxvq_s32, vmaxvq_s8, vmaxvq_u16, vmaxvq_u32, vmaxvq_u8, vminavq_p_s16, vminavq_p_s32, vminavq_p_s8, vminavq_s16, vminavq_s32, vminavq_s8, vminq_x_s16, vminq_x_s32, vminq_x_s8, vminq_x_u16, vminq_x_u32, vminq_x_u8, vminvq_p_s16, vminvq_p_s32, vminvq_p_s8, vminvq_p_u16, vminvq_p_u32, vminvq_p_u8, vminvq_s16, vminvq_s32, vminvq_s8, vminvq_u16, vminvq_u32, vminvq_u8, vmladavaq_p_s16, vmladavaq_p_s32, vmladavaq_p_s8, vmladavaq_p_u16, vmladavaq_p_u32, vmladavaq_p_u8, vmladavaq_s16, vmladavaq_s32, vmladavaq_s8, vmladavaq_u16, vmladavaq_u32, vmladavaq_u8, vmladavaxq_s16, vmladavaxq_s32, vmladavaxq_s8, vmladavq_p_s16, vmladavq_p_s32, vmladavq_p_s8, vmladavq_p_u16, vmladavq_p_u32, vmladavq_p_u8, vmladavq_s16, vmladavq_s32, vmladavq_s8, vmladavq_u16, vmladavq_u32, vmladavq_u8, vmladavxq_p_s16, vmladavxq_p_s32, vmladavxq_p_s8, vmladavxq_s16, vmladavxq_s32, vmladavxq_s8, vmlaldavaq_s16, vmlaldavaq_s32, vmlaldavaq_u16, vmlaldavaq_u32, vmlaldavaxq_s16, vmlaldavaxq_s32, vmlaldavq_p_s16, vmlaldavq_p_s32, vmlaldavq_p_u16, vmlaldavq_p_u32, vmlaldavq_s16, vmlaldavq_s32, vmlaldavq_u16, vmlaldavq_u32, vmlaldavxq_p_s16, vmlaldavxq_p_s32, vmlsdavaq_s16, vmlsdavaq_s32, vmlsdavaq_s8, vmlsdavaxq_s16, vmlsdavaxq_s32, vmlsdavaxq_s8, vmlsdavq_p_s16, vmlsdavq_p_s32, vmlsdavq_p_s8, vmlsdavq_s16, vmlsdavq_s32, vmlsdavq_s8, vmlsdavxq_p_s16, vmlsdavxq_p_s32, vmlsdavxq_p_s8, vmlsdavxq_s16, vmlsdavxq_s32, vmlsdavxq_s8, vmlsldavaq_s16, vmlsldavaq_s32, vmlsldavaxq_s16, vmlsldavaxq_s32, vmlsldavq_p_s16, vmlsldavq_p_s32, vmlsldavq_s16, vmlsldavq_s32, vmlsldavxq_p_s16, vmlsldavxq_p_s32, vmlsldavxq_s16, vmlsldavxq_s32, vmovlbq_x_s16, vmovlbq_x_s8, vmovlbq_x_u16, vmovlbq_x_u8, vmovltq_x_s16, vmovltq_x_s8, vmovltq_x_u16, vmovltq_x_u8, vmulhq_x_s16, vmulhq_x_s32, vmulhq_x_s8, vmulhq_x_u16, vmulhq_x_u32, vmulhq_x_u8, vmullbq_int_x_s16, vmullbq_int_x_s32, vmullbq_int_x_s8, vmullbq_int_x_u16, vmullbq_int_x_u32, vmullbq_int_x_u8, vmullbq_poly_x_p16, vmullbq_poly_x_p8, vmulltq_int_x_s16, vmulltq_int_x_s32, vmulltq_int_x_s8, vmulltq_int_x_u16, vmulltq_int_x_u32, vmulltq_int_x_u8, vmulltq_poly_x_p16, vmulltq_poly_x_p8, vrmlaldavhaq_s32, vrmlaldavhaq_u32, vrmlaldavhaxq_s32, vrmlaldavhq_p_s32, vrmlaldavhq_p_u32, vrmlaldavhq_s32, vrmlaldavhq_u32, vrmlaldavhxq_p_s32, vrmlaldavhxq_s32, vrmlsldavhaq_s32, vrmlsldavhaxq_s32, vrmlsldavhq_p_s32, vrmlsldavhq_s32, vrmlsldavhxq_p_s32, vrmlsldavhxq_s32, vstrbq_p_s16, vstrbq_p_s32, vstrbq_p_s8, vstrbq_p_u16, vstrbq_p_u32, vstrbq_p_u8, vstrbq_s16, vstrbq_s32, vstrbq_s8, vstrbq_scatter_offset_p_s16, vstrbq_scatter_offset_p_s32, vstrbq_scatter_offset_p_s8, vstrbq_scatter_offset_p_u16, vstrbq_scatter_offset_p_u32, vstrbq_scatter_offset_p_u8, vstrbq_scatter_offset_s16, vstrbq_scatter_offset_s32, vstrbq_scatter_offset_s8, vstrbq_scatter_offset_u16, vstrbq_scatter_offset_u32, vstrbq_scatter_offset_u8, vstrbq_u16, vstrbq_u32, vstrbq_u8, vstrdq_scatter_base_p_s64, vstrdq_scatter_base_p_u64, vstrdq_scatter_base_s64, vstrdq_scatter_base_u64, vstrdq_scatter_offset_p_s64, vstrdq_scatter_offset_p_u64, vstrdq_scatter_offset_s64, vstrdq_scatter_offset_u64, vstrdq_scatter_shifted_offset_p_s64,
vstrdq_scatter_shifted_offset_p_u64, vstrdq_scatter_shifted_offset_s64,
vstrdq_scatter_shifted_offset_u64.

This patch adds the support for MVE ACLE intrinsics polymorphic variants with +mve.fp option.

Please refer to M-profile Vector Extension (MVE) intrinsics [1] for more details.
[1] https://developer.arm.com/architectures/instruction-sets/simd-isas/helium/mve-intrinsics

2020-03-31 Srinath Parvathaneni <srinath.parvathaneni@arm.com>

* config/arm/arm_mve.h (vaddlvq): Move the polymorphic variant to the
common section of both MVE Integer and MVE Floating Point.
(vaddvq): Likewise.
(vaddlvq_p): Likewise.
(vaddvaq): Likewise.
(vaddvq_p): Likewise.
(vcmpcsq): Likewise.
(vmlsdavxq): Likewise.
(vmlsdavq): Likewise.
(vmladavxq): Likewise.
(vmladavq): Likewise.
(vminvq): Likewise.
(vminavq): Likewise.
(vmaxvq): Likewise.
(vmaxavq): Likewise.
(vmlaldavq): Likewise.
(vcmphiq): Likewise.
(vaddlvaq): Likewise.
(vrmlaldavhq): Likewise.
(vrmlaldavhxq): Likewise.
(vrmlsldavhq): Likewise.
(vrmlsldavhxq): Likewise.
(vmlsldavxq): Likewise.
(vmlsldavq): Likewise.
(vabavq): Likewise.
(vrmlaldavhaq): Likewise.
(vcmpgeq_m_n): Likewise.
(vmlsdavxq_p): Likewise.
(vmlsdavq_p): Likewise.
(vmlsdavaxq): Likewise.
(vmlsdavaq): Likewise.
(vaddvaq_p): Likewise.
(vcmpcsq_m_n): Likewise.
(vcmpcsq_m): Likewise.
(vmladavxq_p): Likewise.
(vmladavq_p): Likewise.
(vmladavaxq): Likewise.
(vmladavaq): Likewise.
(vminvq_p): Likewise.
(vminavq_p): Likewise.
(vmaxvq_p): Likewise.
(vmaxavq_p): Likewise.
(vcmphiq_m): Likewise.
(vaddlvaq_p): Likewise.
(vmlaldavaq): Likewise.
(vmlaldavaxq): Likewise.
(vmlaldavq_p): Likewise.
(vmlaldavxq_p): Likewise.
(vmlsldavaq): Likewise.
(vmlsldavaxq): Likewise.
(vmlsldavq_p): Likewise.
(vmlsldavxq_p): Likewise.
(vrmlaldavhaxq): Likewise.
(vrmlaldavhq_p): Likewise.
(vrmlaldavhxq_p): Likewise.
(vrmlsldavhaq): Likewise.
(vrmlsldavhaxq): Likewise.
(vrmlsldavhq_p): Likewise.
(vrmlsldavhxq_p): Likewise.
(vabavq_p): Likewise.
(vmladavaq_p): Likewise.
(vstrbq_scatter_offset): Likewise.
(vstrbq_p): Likewise.
(vstrbq_scatter_offset_p): Likewise.
(vstrdq_scatter_base_p): Likewise.
(vstrdq_scatter_base): Likewise.
(vstrdq_scatter_offset_p): Likewise.
(vstrdq_scatter_offset): Likewise.
(vstrdq_scatter_shifted_offset_p): Likewise.
(vstrdq_scatter_shifted_offset): Likewise.
(vmaxq_x): Likewise.
(vminq_x): Likewise.
(vmovlbq_x): Likewise.
(vmovltq_x): Likewise.
(vmulhq_x): Likewise.
(vmullbq_int_x): Likewise.
(vmullbq_poly_x): Likewise.
(vmulltq_int_x): Likewise.
(vmulltq_poly_x): Likewise.
(vstrbq): Likewise.

gcc/testsuite/ChangeLog:

2020-03-31 Srinath Parvathaneni <srinath.parvathaneni@arm.com>

* gcc.target/arm/mve/intrinsics/vcmpcsq_m_n_u16.c: Modify.
* gcc.target/arm/mve/intrinsics/vcmpcsq_m_n_u32.c: Likewise.
* gcc.target/arm/mve/intrinsics/vcmpcsq_m_n_u8.c: Likewise.
* gcc.target/arm/mve/intrinsics/vcmpeqq_n_f16.c: Likewise.
* gcc.target/arm/mve/intrinsics/vcmpeqq_n_f32.c: Likewise.
* gcc.target/arm/mve/intrinsics/vcmpgeq_m_n_s16.c: Likewise.
* gcc.target/arm/mve/intrinsics/vcmpgeq_m_n_s32.c: Likewise.
* gcc.target/arm/mve/intrinsics/vcmpgeq_m_n_s8.c: Likewise.
* gcc.target/arm/mve/intrinsics/vcmpgtq_m_n_f16.c: Likewise.
* gcc.target/arm/mve/intrinsics/vcmpgtq_m_n_f32.c: Likewise.
* gcc.target/arm/mve/intrinsics/vcmpgtq_n_f16.c: Likewise.
* gcc.target/arm/mve/intrinsics/vcmpgtq_n_f32.c: Likewise.
* gcc.target/arm/mve/intrinsics/vcmpleq_m_n_f16.c: Likewise.
* gcc.target/arm/mve/intrinsics/vcmpleq_m_n_f32.c: Likewise.
* gcc.target/arm/mve/intrinsics/vcmpleq_n_f16.c: Likewise.
* gcc.target/arm/mve/intrinsics/vcmpleq_n_f32.c: Likewise.
* gcc.target/arm/mve/intrinsics/vcmpltq_m_n_f16.c: Likewise.
* gcc.target/arm/mve/intrinsics/vcmpltq_m_n_f32.c: Likewise.
* gcc.target/arm/mve/intrinsics/vcmpneq_m_n_f16.c: Likewise.
* gcc.target/arm/mve/intrinsics/vcmpneq_m_n_f32.c: Likewise.
* gcc.target/arm/mve/intrinsics/vcmpneq_n_f16.c: Likewise.
* gcc.target/arm/mve/intrinsics/vcmpneq_n_f32.c: Likewise.

aarch64: Fix up aarch64_compare_and_swaphi pattern [PR94368]

The following testcase ICEs in final_scan_insn_1. The problem is in the
@aarch64_compare_and_swaphi define_insn_and_split, since 9 it uses
aarch64_plushi_operand predicate for the "expected value" operand, which
allows either 0..0xfff constants or 0x1000..0xf000 constants (i.e. HImode
values which when zero extended are either 0..0xfff or (0..0xfff) << 12).
The problem is that RA doesn't care about predicates, it honors just
constraints and the used constraint on the operand is n, which means any
HImode CONST_SCALAR_INT. In the testcase LRA thus propagates the -1
value into the insn.
This is a define_insn_and_split which requires mandatory split.
But during split2 pass, we check the predicate (and don't check
constraints), which fails and thus we don't split it and during final ICE
because the mandatory splitting didn't happen.

The following patch fixes it by adding a matching constraint to the
predicate and using it.

2020-03-31 Jakub Jelinek <jakub@redhat.com>

PR target/94368
* config/aarch64/constraints.md (Uph): New constraint.
* config/aarch64/atomics.md (cas_short_expected_imm): New mode attr.
(@aarch64_compare_and_swap<mode>): Use it instead of n in operand 2's
constraint.

* gcc.dg/pr94368.c: New test.

fold-const: Fix division folding with vector operands [PR94412]

The following testcase is miscompiled since 4.9, we treat unsigned
vector types as if they were signed and "optimize" negations across it.

2020-03-31 Marc Glisse <marc.glisse@inria.fr>
Jakub Jelinek <jakub@redhat.com>

PR middle-end/94412
* fold-const.c (fold_binary_loc) <case TRUNC_DIV_EXPR>: Use
ANY_INTEGRAL_TYPE_P instead of INTEGRAL_TYPE_P.

* gcc.c-torture/execute/pr94412.c: New test.

Co-authored-by: Marc Glisse <marc.glisse@inria.fr>

store-merging: Allow enums during bswap recognition [PR94403]

The following testcase is optimized with char/unsigned char/signed char,
but not with std::byte. The following patch fixes that. Didn't use
INTEGRAL_TYPE_P because bswapping bools is just too weird.

2020-03-31 Jakub Jelinek <jakub@redhat.com>

PR tree-optimization/94403
* gimple-ssa-store-merging.c (verify_symbolic_number_p): Allow also
ENUMERAL_TYPE lhs_type.

* g++.dg/tree-ssa/pr94403.C: New test.

forwprop: Pattern recognize more rotates [PR94344]

The following patch adjusts simplify_rotate to recognize more rotates,
basically we allow even some same precision integral -> integral
conversions, with the requirement that the RSHIFT_EXPR operand has to be
done in unsigned type (i.e. logical right shift), so that we compensate for
the combiner no longer being able to simplify those into rotates on some
targets.

2020-03-31 Jakub Jelinek <jakub@redhat.com>

PR rtl-optimization/94344
* tree-ssa-forwprop.c (simplify_rotate): Handle also same precision
conversions, either on both operands of |^+ or just one. Handle
also extra same precision conversion on RSHIFT_EXPR first operand
provided RSHIFT_EXPR is performed in unsigned type.

* gcc.dg/pr94344.c: New test.

lra: set insn_code_data to NULL when freeing

libgccjit's test-threads.c repeatedly compiles and runs numerous tests,
each in a separate thread.

Attempting to add an empty test that generates no code leads to a
double-free ICE within that thread, within lra.c's
finish_insn_code_data_once.

The root cause is that the insn_code_data array is cleared in
init_insn_code_data_once, but this is only called the first time
a cgraph_node is expanded [1], whereas the "loop-over-all-elements
and free them" is unconditionally called in finalize [2].  Hence
if there are no functions:
* the array is not re-initialized for the empty context
* when finish_insn_code_data_once is called for the empty context
it still contains the freed pointers from the previous context
that held the jit mutex, and hence the free is a double-free.

This patch sets the pointers to NULL after freeing them, fixing
the ICE.

[1]
init_insn_code_data_once is called via
  lra_init_once called by
    ira_init_once called by
      initialize_rtl, via:
         if (!rtl_initialized)
           ira_init_once ();
        called by init_function_start
           called by cgraph_node::expand

[2]:
finish_insn_code_data_once is called by:
  lra_finish_once called by
    finalize

gcc/ChangeLog:
* lra.c (finish_insn_code_data_once): Set the array elements
to NULL after freeing them.

gcc/testsuite/ChangeLog:
* jit.dg/all-non-failing-tests.h: Add test-empty.c

Daily bump.

Update gcc sv.po.

* sv.po: Update.

c++: Fix comparison of fn() and ns::fn() [PR90711]

The resolution of CWG issue 1321 clarified that when deciding whether two
expressions involving template parameters are equivalent, two dependent
function calls where the function is named with an unqualified-id are
considered to be equivalent if the name is the same, even if unqualified
lookup finds different sets of functions. We were wrongly treating
qualified-ids the same way, so that EXISTS and test::EXISTS were considered
to be equivalent even though they are looking up the name in different
scopes. This also causes a mangling bug, but I don't think it's safe to fix
that for GCC 10; this patch just fixes the comparison.

gcc/cp/ChangeLog
2020-03-30 Jason Merrill <jason@redhat.com>

PR c++/90711
* tree.c (cp_tree_equal) [CALL_EXPR]: Compare KOENIG_LOOKUP_P.
(called_fns_equal): Check DECL_CONTEXT.

c++: Fix handling of internal fn calls in statement expressions [PR94385]

The following testcase ICEs, because the FE when processing the statement
expression changes the .VEC_CONVERT internal fn CALL_EXPR into .PHI call.
That is because the internal fn call is recorded in the base.u.ifn
field, which overlaps base.u.bits.lang_flag_1 which is used for
STMT_IS_FULL_EXPR_P, so this essentially does ifn |= 2 on little-endian.
STMT_IS_FULL_EXPR_P bit is used in:
cp-gimplify.c- if (STATEMENT_CODE_P (code))
cp-gimplify.c- {
cp-gimplify.c- saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
cp-gimplify.c- current_stmt_tree ()->stmts_are_full_exprs_p
cp-gimplify.c: = STMT_IS_FULL_EXPR_P (*expr_p);
cp-gimplify.c- }
and
pt.c- if (STATEMENT_CODE_P (TREE_CODE (t)))
pt.c: current_stmt_tree ()->stmts_are_full_exprs_p = STMT_IS_FULL_EXPR_P (t);
so besides being wrong on some other codes, it actually isn't beneficial at
all to set it on anything else, so the following patch restricts it to
trees with STATEMENT_CODE_P TREE_CODE.

2020-03-30 Jakub Jelinek <jakub@redhat.com>

PR c++/94385
* semantics.c (add_stmt): Only set STMT_IS_FULL_EXPR_P on trees with
STATEMENT_CODE_P code.

* c-c++-common/pr94385.c: New test.

Define TRY_EMPTY_VM_SPACE for riscv64-linux

* config/host-linux.c (TRY_EMPTY_VM_SPACE) [__riscv && __LP64__]:
Define.

RS6000 Allow builtin initialization regardless of mask

 Disable the code that limits initialization of builtins based
on the rs6000_builtin_mask. This allows all built-ins to be
properly referenced when building code using #pragma for cpu
targets newer than what was specified by the -mcpu default.
The use of built-ins is still properly limited by logic within
altivec_resolve_overloaded_builtin().

2020-03-30 Will Schmidt <will_schmidt@vnet.ibm.com>

gcc/
 * config/rs6000/rs6000-call.c altivec_init_builtins(): Remove code
 to skip defining builtins based on builtin_mask.

gcc/testsuite/
 * gcc.target/powerpc/pragma_power6.c: New.
 * gcc.target/powerpc/pragma_power7.c: New.
 * gcc.target/powerpc/pragma_power8.c: New.
 * gcc.target/powerpc/pragma_power9.c: New.
 * gcc.target/powerpc/pragma_misc9.c: New.
 * gcc.target/powerpc/vsu/vec-all-nez-7.c: Update error message.
 * gcc.target/powerpc/vsu/vec-any-eqz-7.c: Update error message.

Update bswap64-4 test for desired results

Update existing testcase powerpc/bswap64-4.c to
reflect that we generate ldbrx and stdbrx instructions
for newer cpu targets, versus the pair of lwbrx and stwbrx
instructions as seen on previous cpu targets.

2020-03-24 Will Schmidt <will_schmidt@vnet.ibm.com>

gcc/testsuite/
* gcc.target/powerpc/bswap64-4.c: Update scan-assembler
expected results.

i386: Fix up *one_cmplv*2* insn with avx512f [PR94343]

This define_insn has two issues.
One is that with -mavx512f -mno-avx512vl it can emit an AVX512VL-only insn
- 128-bit or 256-bit EVEX encoded vpternlog{d,q}.
Another one is that because there is no vpternlog{b,w}, we emit vpternlogd
instead, but then we shouldn't pretend we support masking of that, because
we don't.
The first one can be fixed by forcing the use of %zmm* registers instead of
%xmm* or %ymm* if AVX512F but not AVX512VL, like we do for a couple of other
insns (although that is primarily done in order to support %xmm16+ regs).
But we need to make sure that in that case the input operand isn't memory,
because while we can read and store the higher bits of registers, we don't
want to read from memory more bytes than what we should read.

A variant to these two if_then_else set attrs, condition in the output and
larger condition would be 4 different define_insns (one with something like
VI48_AVX512VL iterator, masking, no g modifiers and "vm" input constraint,
another one with VI48_AVX iterator, !TARGET_AVX512VL in condition,
no masking, g modifiers and "v" input constraint, one with VI12_AVX512VL
iterator, no masking, no g modifiers and "vm" input constraint and last one with
VI12_AVX2 iterator, !TARGET_AVX512VL in condition, no masking, g modifiers
and "v" input constraint, but I think having one pattern is shorter than
that.

2020-03-30 Jakub Jelinek <jakub@redhat.com>

PR target/94343
* config/i386/sse.md (<mask_codefor>one_cmpl<mode>2<mask_name>): If
!TARGET_AVX512VL, use 512-bit vpternlog and make sure the input
operand is a register. Don't enable masked variants for V*[QH]Imode.

* gcc.target/i386/avx512f-pr94343.c: New test.
* gcc.target/i386/avx512vl-pr94343.c: New test.

XFAIL pr57193.c test-case.

PR rtl-optimization/87716
* gcc.target/i386/pr57193.c: XFAIL a test-case.

Fix scan pattern of vect-8.f90 dump.

PR testsuite/94402
* gfortran.dg/vect/vect-8.f90: Allow 22 or 23 loops
to be vectorized (based on libmvec presence).

Fix vextract* masked patterns [PR93069]

The AVX512F documentation clearly states that in instructions where the
destination is a memory only merging-masking is possible, not zero-masking,
and the assembler enforces that.

The testcase in this patch fails to assemble because of
Error: unsupported masking for `vextracti32x8'
on
vextracti32x8 $0x0, %zmm1, -64(%rsp){%k1}{z}
For the vector extraction patterns, we apparently have 7 *_maskm patterns
that only accept memory destinations and rtx_equal_p merge-masking source
for it, 7 *<mask_name> corresponding patterns that allow memory destination
only for the non-masked cases (through <store_mask_constraint>), then 2
*<mask_name> patterns (lo ssehalf V16FI and lo ssehalf VI8F_256 ones) which
do allow memory destination even for masked cases and are the cause of the
testsuite failure, because we must not allow C constraint if the destination
is m, and finally one pair of patterns (separate * and *_mask, hi ssehalf
VI4F_256), which has another issue (for which I don't have a testcase
though), where if it would match zero-masking with register destination,
it wouldn't emit the needed {z} into assembly.
The attached patch fixes those 3 issues only, perhaps more suitable for
backporting.

2020-03-30 Jakub Jelinek <jakub@redhat.com>

PR target/93069
* config/i386/sse.md (vec_extract_lo_<mode><mask_name>): Use
<store_mask_constraint> instead of m in output operand constraint.
(vec_extract_hi_<mode><mask_name>): Use <mask_operand2> instead of
%{%3%}.

* gcc.target/i386/avx512vl-pr93069.c: New test.
* gcc.dg/vect/pr93069.c: New test.

[RS6000] Put call cookie back in AIX/ELFv2 call patterns

-mlongcall -mno-pltseq is supposed to emit long calls by using
indirect calls.  It differs from -mlongcall -mpltseq in that the
function addresses are not placed in the PLT and thus lazy PLT
resolution is not available, affecting programs that dlopen shared
libraries.

In the case of -mcpu=future -mpcrel -mlongcall -mno-pltseq we see an
indirect call being generated, but combine merrily optimises the
sequence back to a direct call.  call_indirect_pcrel is enough like
call_nonlocal_aix that this can happen.

This patch puts the call cookie back in the call rtl, removed by git
commit f90f960ca8, in order to disable the optimisation for long
calls.  When that is done for call_local_aix the pattern becomes the
same as call_local32/64, so I merged them.  The only difference
besides mode between call_local32 and call_local64, dating back to
1998 commit a260abc996, is that call_local64 has TARGET_64BIT in the
predicate.  That alone doesn't seem reason enough to need separate
patterns; The P mode iterator selects DI on TARGET_64BIT anyway.

* config/rs6000/rs6000.c (rs6000_call_aix): Emit cookie to pattern.
(rs6000_indirect_call_template_1): Adjust to suit.
* config/rs6000/rs6000.md (call_local): Merge call_local32,
call_local64, and call_local_aix.
(call_value_local): Simlarly.
(call_nonlocal_aix, call_value_nonlocal_aix): Adjust rtl to suit,
and disable pattern when CALL_LONG.
(call_indirect_aix, call_value_indirect_aix): Adjust rtl.
(call_indirect_elfv2, call_indirect_pcrel): Likewise.
(call_value_indirect_elfv2, call_value_indirect_pcrel): Likewise.

Daily bump.

doc: Update -falign-functions/-falign-loops/-falign-jumps

Change -falign-functions=N to

    Align the start of functions to the next power-of-two greater than
    or equal to N.

Add

    If '-falign-labels' is greater than this value, then its value is
    used instead.

to -falign-loops=N and -falign-jumps=N.

PR driver/94381
* doc/invoke.texi: Update -falign-functions, -falign-loops and
-falign-jumps documentation.

testsuite: Handle more kinds of gdc.test test flags and directives.

This patch adds cases for JSON and D header file generation flags in the
testsuite, and sets up the test accordingly to only compile, then check
that the expected output file exists.

Support has also been added for the DFLAGS test directive, which
disables testing with all default flag permutations.

gcc/testsuite/ChangeLog:

* lib/gdc-utils.exp: (gdc-convert-args): Handle compilation test
arguments -D, -H, -X, and set compilable_output_file_ext.
(gdc-convert-test): Document and add cases DFLAGS and
EXTRA_CPP_SOURCES. Add dg-final entry for output generation tests,
and set compilable_do_what to compile.
(gdc-do-test): Define compilable_do_what, default to assemble.

testsuite: Move C++ tests in gdc.test into own subdirectory.

Tests have been moved into runnable_cxx as part of upstream dmd 3e10e2dd2.

The extra flags required for tests that mix C++ and D are now limited to
only a small subset of tests, rather than applied to all tests across
gdc.dg and gdc.test.

Reviewed-on: https://github.com/dlang/dmd/pull/10980

gcc/testsuite/ChangeLog:

* gdc.test/runnable_cxx/runnable_cxx.exp: New file.
* lib/gdc-utils.exp (gdc-do-test): Add case for runnable_cxx.
* lib/gdc.exp (gdc_include_flags): Only add flags for libstdc++-v3 if
GDC_INCLUDE_CXX_FLAGS is true.
(gdc_link_flags): Likewise.
(gdc_init): Move setting of default gdc test flags to...
(gdc_target_compile): ...here.

Fix typo in a warning related to flatten.

PR ipa/94363
* cgraphunit.c (process_function_and_variable_attributes): Remove
double 'attribute' words.

Delete duplicate .align output.

2020-03-29 John David Anglin <dave.anglin@bell.net>

* gcc/config/pa/pa.c (pa_asm_output_aligned_bss): Delete duplicate
.align output.

testsuite: Split up gdc-test.exp into each subdirectory

Use multiple test scripts, one for each subdirectory containing test
files, instead of having one test script to manage them all.

This allows removing some workarounds, such as the need to create
symlinks in the test run directory.

gcc/testsuite/ChangeLog:

* gdc.test/compilable/compilable.exp: New file.
* gdc.test/fail_compilation/fail_compilation.exp: New file.
* gdc.test/gdc-test.exp: Remove.
* gdc.test/runnable/runnable.exp: New file.
* lib/gdc-utils.exp: ...this. Remove load_lib gdc-dg.exp.
(dmd2dg): Rename to...
(gdc-convert-test): ...this.
(gdc-do-test): Add testcases parameter and remove subdir handling.

Daily bump.

libstdc++: Fix two tests that fail in C++20 mode

* testsuite/20_util/is_constructible/value-2.cc: Fix test to account
for changes due to parenthesized aggregate-initialization in C++20.
* testsuite/20_util/time_point/cons/81468.cc: Fix test to not clash
with std::chrono::sys_time in C++20.

libstdc++: Fix std::reverse_iterator relational operators

My recent changes to reverse_iterator's comparisons was not the version
of the code (or tests) that I meant to commit, and broke the relational
operators. This fixes them to reverse the order of the comparisons on
the base() iterators.

This also replaces the SFINAE constraints in the return type of the
reverse_iterator and move_iterator comparisons with a requires-clause.
This ensures the constrained overloads are preferred to unconstrained
ones. This means the non-standard same-type overloads can be omitted for
C++20 because they're not needed to solve the problem with std::rel_ops
or the testsuite's greedy_ops::X type.

* include/bits/stl_iterator.h (reverse_iterator): Use requires-clause
to constrain C++20 versions of comparison operators. Fix backwards
logic of relational operators.
(move_iterator): Use requires-clause to constrain comparison operators
in C++20. Do not declare non-standard same-type overloads for C++20.
* testsuite/24_iterators/move_iterator/rel_ops_c++20.cc: Check result
of comparisons and check using greedy_ops type.
* testsuite/24_iterators/reverse_iterator/rel_ops_c++20.cc: Likewise.
* testsuite/24_iterators/move_iterator/greedy_ops.cc: Remove redundant
main function from compile-only test.
* testsuite/24_iterators/reverse_iterator/greedy_ops.cc: Likewise.

testsuite: adjust modulo-sched compare-debug tests

Without this patch tortured tests eventually fail because of another
known issue which I plan to fix later in stage1.

* gcc.dg/torture/pr87197-debug-sms.c: Move to ...
* gcc.dg/sms-compare-debug-1.c: ... this. Add -O2.
* gcc.c-torture/execute/pr70127-debug-sms.c: Move to ...
* gcc.dg/sms-compare-debug-2.c: ... this. Add -O2.

Patch for PR94246

[Fortran] Fix result-variable handling of MODULE PROCEDURE (PR94348)

PR fortran/94348
* decl.c (gfc_match_submod_proc): Add result var to the
proc's namespace.

PR fortran/94348
* gfortran.dg/module_procedure_3.f90: New.

c++: Diagnose when "requires" is used instead of "requires requires" [PR94306]

This adds support to detect and recover from the case where an opening brace
immediately follows the start of a requires-clause. So rather than emitting the
error

error: expected primary-expression before '{' token

followed by a slew of irrevelant errors, we now assume the user had intended to
write "requires requires {" and diagnose and recover accordingly.

gcc/cp/ChangeLog:

PR c++/94306
* parser.c (cp_parser_requires_clause_opt): Diagnose and recover from
"requires {" when "requires requires {" was probably intended.

gcc/testsuite/ChangeLog:

PR c++/94306
* g++.dg/concepts/diagnostic8.C: New test.

c++: requires-expression outside of a template is misevaluated [PR94252]

This PR shows that a REQUIRES_EXPR outside of a template can sometimes be
misevaluated. This happens because the evaluation routine tsubst_requires_expr
(and diagnose_requires_expr) assumes the REQUIRES_EXPR's subtrees are templated
trees and that therefore it's safe to call tsubst_expr on them. But this
assumption isn't valid when we've parsed a REQUIRES_EXPR outside of a template
context. In order to make this assumption valid here, this patch sets
processing_template_decl to non-zero before parsing the body of a REQUIRES_EXPR
so that its subtrees are indeed always templated trees.

gcc/cp/ChangeLog:

PR c++/94252
* constraint.cc (tsubst_compound_requirement): Always suppress errors
from type_deducible_p and expression_convertible_p, as they're not
substitution errors.
(diagnose_atomic_constraint) <case INTEGER_CST>: Remove this case so
that we diagnose INTEGER_CST expressions of non-bool type via the
default case.
* cp-gimplify.c (cp_genericize_r) <case REQUIRES_EXPR>: New case.
* parser.c (cp_parser_requires_expression): Always parse the requirement
body as if we're processing a template, by temporarily incrementing
processing_template_decl. Afterwards, if we're not actually in a
template context, perform semantic processing to diagnose any invalid
types and expressions.
* pt.c (tsubst_copy_and_build) <case REQUIRES_EXPR>: Remove dead code.
* semantics.c (finish_static_assert): Explain an assertion failure
when the condition is a REQUIRES_EXPR like we do when it is a concept
check.

gcc/testsuite/ChangeLog:

PR c++/94252
* g++.dg/concepts/diagnostic7.C: New test.
* g++.dg/concepts/pr94252.C: New test.
* g++.dg/cpp2a/concepts-requires18.C: Adjust to expect an additional
diagnostic.

c++: Respect current_constraint_diagnosis_depth in diagnose_compound_requirement

The previous patch tries to avoid changing our current default diagnostics. But
for the sake of consistency we arguably should also respect
current_constraint_diagnosis_depth in diagnose_compound_requirement() like we do
in the other error-replaying diagnostic routines. But doing so would be a
change to our default diagnostics behavior, so the change has been split out
into this separate patch for separate consideration.

gcc/cp/ChangeLog:

* constraint.cc (diagnose_compound_requirement): When diagnosing a
compound requirement, maybe replay the satisfaction failure, subject to
the current diagnosis depth.

gcc/testsuite/ChangeLog:

* g++.dg/concepts/diagnostic1.C: Pass -fconcepts-diagnostics-depth=2.
* g++.dg/concepts/diagnostic5.C: Adjust expected diagnostics.
* g++.dg/cpp2a/concepts-iconv1.C: Pass -fconcepts-diagnostics-depth=2.
* g++.dg/cpp2a/concepts-requires5.C: Likewise.

c++: Replay errors during diagnosis of constraint satisfaction failures

This patch adds a new flag -fconcepts-diagnostics-depth to the C++ frontend
which controls how deeply we replay errors when diagnosing a constraint
satisfaction failure. The default is -fconcepts-diagnostics-depth=1 which
diagnoses only the topmost constraint satisfaction failure and is consistent
with our behavior before this patch. By increasing this flag's value, the user
can control how deeply they want the compiler to explain a constraint
satisfaction error.

For example, if the unsatisfied constraint is a disjunction, then the default
behavior is to just say "no branch in the disjunction is satisfied", but with
-fconcepts-diagnostics-depth=2 we will additionally replay and diagnose the
error in each branch of the disjunction. And if the unsatisfied constraint is a
requires expression, then we will replay the error in the requires expression,
etc. This proceeds recursively until there is nothing more to replay or we
exceeded the maximum depth specified by the flag.

Implementation wise, this patch essentially just uncomments the existing
commented-out code that performs the error-replaying, and along the way adds
logic to keep track of and limit the current replay depth. Besides that, there
is a new routine collect_operands_of_disjunction which flattens a disjunction
and collects all of its operands into a vector.

The extra diagnostics enabled by this flag are at times longer than they need to
be (e.g. "the operand is_array_v<...> is unsatisfied because \n the expression
is_array_v<...> [with ...] evaluated to false") and not immediately easy to
follow (especially when there are nested disjunctions), but the transparency
provided by these optional diagnostics seems to be pretty helpful in practice.

gcc/c-family/ChangeLog:

* c.opt: Add -fconcepts-diagnostics-depth.

gcc/cp/ChangeLog:

* constraint.cc (finish_constraint_binary_op): Set the location of EXPR
as well as its range, because build_x_binary_op doesn't always do so.
(current_constraint_diagnosis_depth): New.
(concepts_diagnostics_max_depth_exceeded_p): New.
(collect_operands_of_disjunction): New.
(satisfy_disjunction): When diagnosing a satisfaction failure, maybe
replay each branch of the disjunction, subject to the current diagnosis
depth.
(diagnose_valid_expression): When diagnosing a satisfaction failure,
maybe replay the substitution error, subject to the current diagnosis
recursion.
(diagnose_valid_type): Likewise.
(diagnose_nested_requiremnet): Likewise.
(diagnosing_failed_constraint::diagnosing_failed_constraint): Increment
current_constraint_diagnosis_depth when diagnosing.
(diagnosing_failed_constraint::~diagnosing_failed_constraint): Decrement
current_constraint_diagnosis_depth when diagnosing.
(diagnosing_failed_constraint::replay_errors_p): New static member
function.
(diagnose_constraints): Don't diagnose if concepts_diagnostics_max_depth
is 0. Emit a one-off note to increase -fconcepts-diagnostics-depth if
the limit was exceeded.
* cp-tree.h (diagnosing_failed_constraint::replay_errors_p): Declare.

gcc/testsuite/ChangeLog:

* g++.dg/concepts/diagnostic2.C: Expect "no operand" instead of
"neither operand".
* g++.dg/concepts/diagnostic5.C: New test.

c: After issuing errors about array size, for error-recovery don't make the array VLA [PR93573]

After we report various errors about array size, we set for error-recovery
the size to be 1, but because size_int_const is false, it still means we
pretend the array is a VLA, can emit a second diagnostics in that case etc.
E.g.
$ ./cc1.unpatched -quiet a.c
a.c:1:5: error: size of array ‘f’ has non-integer type
 1 | int f[100.0];
 | ^
a.c:1:1: warning: variably modified ‘f’ at file scope
 1 | int f[100.0];
 | ^~~
$ ./cc1 -quiet a.c
a.c:1:5: error: size of array ‘f’ has non-integer type
 1 | int f[100.0];
 | ^

2020-03-28 Jakub Jelinek <jakub@redhat.com>

PR c/93573
* c-decl.c (grokdeclarator): After issuing errors, set size_int_const
to true after setting size to integer_one_node.

* gcc.dg/pr93573-1.c: New test.
* gcc.dg/pr93573-2.c: New test.

reassoc: Fix -fcompare-debug bug in reassociate_bb [PR94329]

The following testcase FAILs with -fcompare-debug, because reassociate_bb
mishandles the case when the last stmt in a bb has zero uses. In that case
reassoc_remove_stmt (like gsi_remove) moves the iterator to the next stmt,
i.e. gsi_end_p is true, which means the code sets the iterator back to
gsi_last_bb. The problem is that the for loop does gsi_prev on that before
handling the next statement, which means the former penultimate stmt, now
last one, is not processed by reassociate_bb.
Now, with -g, if there is at least one debug stmt at the end of the bb,
reassoc_remove_stmt moves the iterator to that following debug stmt and we
just do gsi_prev and continue with the former penultimate non-debug stmt,
now last non-debug stmt.

The following patch fixes that by not doing the gsi_prev in this case; there
are too many continue; cases, so I didn't want to copy over the gsi_prev to
all of them, so this patch uses a bool for that instead. The second
gsi_end_p check isn't needed anymore, because when we don't do the
undesirable gsi_prev after gsi = gsi_last_bb, the loop !gsi_end_p (gsi)
condition will catch the removal of the very last stmt from a bb.

2020-03-28 Jakub Jelinek <jakub@redhat.com>

PR tree-optimization/94329
* tree-ssa-reassoc.c (reassociate_bb): When calling reassoc_remove_stmt
on the last stmt in a bb, make sure gsi_prev isn't done immediately
after gsi_last_bb.

* gfortran.dg/pr94329.f90: New test.

Daily bump.

libstdc++: Define __cpp_lib_ranges macro for C++20

Define the feature test macro now that ranges support is complete.

This also changes the preprocessor checks for the __cpp_concepts macro
so that library components depending on concepts are only enabled when
C++20 concepts are supported, and not just for the Concepts TS (which
uses different syntax in places).

* include/bits/range_cmp.h (__cpp_lib_ranges): Define.
* include/bits/stl_iterator.h: Check value of __cpp_concepts so that
C++20 concepts are required.
* include/bits/stl_iterator_base_types.h: Likewise.
* include/std/concepts: Likewise.
* include/std/version: Likewise.
* testsuite/std/ranges/headers/ranges/synopsis.cc: Check feature test
macro.

libstdc++: Add remaining C++20 changes to iterator adaptors

This adds the missing parts of P0896R4 to reverse_iterator and
move_iterator, so that they meet the C++20 requirements. This should be
the last piece of P0896R4, meaning ranges support is now complete.

The PR 94354 bug with reverse_iterator's comparisons is fixed for C++20
only, but that change should be extended to C++11, C++14 and C++17 modes
in stage 1.

* include/bits/stl_iterator.h (reverse_iterator::iterator_concept)
(reverse_iterator::iterator_category): Define for C++20.
(reverse_iterator): Define comparison operators correctly for C++20.
(__normal_iterator): Add constraints to comparison operators for C++20.
(move_iterator::operator++(int)) [__cpp_lib_concepts]: Define new
overload for input iterators.
(move_iterator): Add constraints to comparison operators for C++20.
Define operator<=> for C++20.
* testsuite/24_iterators/move_iterator/input_iterator.cc: New test.
* testsuite/24_iterators/move_iterator/move_only.cc: New test.
* testsuite/24_iterators/move_iterator/rel_ops_c++20.cc: New test.
* testsuite/24_iterators/reverse_iterator/rel_ops_c++20.cc: New test.

libstdc++: Implement C++20 changes to insert iterators

std::insert_iterator and std::inserter need to be adjusted for C++20, so
that they use ranges::iterator_t. That alias template requires
ranges::begin to be defined. Rather than moving the whole of
ranges::begin (and related details like ranges::enable_borrowed_range)
into <iterator>, this defines a new, simpler version of ranges::begin
that is sufficient for ranges::iterator_t to be defined. This works
because ranges::iterator_t uses an lvalue reference type, so the logic
in ranges::begin for non-lvalue ranges (i.e. borrowed ranges) isn't
needed.

This also adds the missing constexpr specifiers to the other insert
iterators.

* include/bits/iterator_concepts.h (__detail::__decay_copy)
(__detail::__member_begin, __detail::__adl_begin): Move here from
<bits/range_access.h>.
(__detail::__ranges_begin, __detail::__range_iter_t): Define.
* bits/range_access.h (__cust_access::__decay_copy)
(__cust_access::__member_begin, __cust_access::__adl_begin): Move to
<bits/iterator_concepts.h>.
(ranges::iterator_t): Use __detail::__range_iter_t.
* include/bits/stl_iterator.h (back_insert_iterator): Simplify
conditional compilation. Add _GLIBCXX20_CONSTEXPR to all members.
(front_insert_iterator): Likewise.
(insert_iterator): Implement changes from P0896R4 for C++20.
* testsuite/24_iterators/back_insert_iterator/constexpr.cc: New test.
* testsuite/24_iterators/front_insert_iterator/constexpr.cc: New test.
* testsuite/24_iterators/headers/iterator/synopsis_c++17.cc: Adjust
for inclusion in synopsis_c++20.cc which expects different signatures
for some function templates.
* testsuite/24_iterators/insert_iterator/constexpr.cc: New test.

libstdc++: Move definition earlier in file

This moves __is_array_convertible so it's not between
__is_nothrow_convertible and its helper, since it isn't related to
those.

* include/std/type_traits (__is_array_convertible): Move definition
to immediately after is_convertible.

Update gcc de.po.

[RS6000] PR94145, make PLT loads volatile

The PLT is volatile.  On PowerPC it is a bss style section which the
dynamic loader initialises to point at resolver stubs (called glink on
PowerPC64) to support lazy resolution of function addresses.  The
first call to a given function goes via the dynamic loader symbol
resolver, which updates the PLT entry for that function and calls the
function.  The second call, if there is one and we don't have a
multi-threaded race, will use the updated PLT entry and thus avoid
the relatively slow symbol resolver path.

Calls via the PLT are like calls via a function pointer, except that
no initialised function pointer is volatile like the PLT.  All
initialised function pointers are resolved at program startup to point
at the function or are left as NULL.  There is no support for lazy
resolution of any user visible function pointer.

So why does any of this matter to gcc?  Well, normally the PLT call
mechanism happens entirely behind gcc's back, but since we implemented
inline PLT calls (effectively putting the PLT code stub that loads the
PLT entry inline and making that code sequence scheduled), the load of
the PLT entry is visible to gcc.  That load then is subject to gcc
optimization, for example in

/* -S -mcpu=future -mpcrel -mlongcall -O2.  */
int foo (int);
void bar (void)
{
  while (foo(0))
    foo (99);
}

we see the PLT load for foo being hoisted out of the loop and stashed
in a call-saved register.  If that happens to be the first call to
foo, then the stashed value is that for the resolver stub, and every
call to foo in the loop will then go via the slow resolver path.  Not
a good idea.  Also, if foo turns out to be a local function and the
linker replaces the PLT calls with direct calls to foo then gcc has
just wasted a call-saved register.

This patch teaches gcc that the PLT loads are volatile.  The change
doesn't affect other loads of function pointers and thus has no effect
on normal indirect function calls.  Note that because the
"optimization" this patch prevents can only occur over function calls,
the only place gcc can stash PLT loads is in call-saved registers or
in other memory.  I'm reasonably confident that this change will be
neutral or positive for the "ld -z now" case where the PLT is not
volatile, in code where there is any register pressure.  Even if gcc
could be taught to recognise cases where the PLT is resolved, you'd
need to discount use of registers to cache PLT loads by some factor
involving the chance that those calls would be converted to direct
calls.

PR target/94145
* config/rs6000/rs6000.c (rs6000_longcall_ref): Use unspec_volatile
for PLT16_LO and PLT_PCREL.
* config/rs6000/rs6000.md (UNSPEC_PLT16_LO, UNSPEC_PLT_PCREL): Remove.
(UNSPECV_PLT16_LO, UNSPECV_PLT_PCREL): Define.
(pltseq_plt16_lo_, pltseq_plt_pcrel): Use unspec_volatile.

c++: Handle COMPOUND_EXPRs in ocp_convert [PR94339]

With the PR94346 fix in, we can revert the attr-copy-2.C workaround.

2020-03-27 Jakub Jelinek <jakub@redhat.com>

PR c++/94339
* g++.dg/ext/attr-copy-2.C: Revert the last changes.

PR c++/94346 - [9/10 Regression] ICE due to handle_copy_attribute since r9-3982

gcc/c-family/ChangeLog:

PR c++/94346
* c-attribs.c (handle_copy_attribute): Avoid passing expressions
to decl_attributes. Make handling of different kinds of entities
more robust.

gcc/c-c++-common/ChangeLog:

PR c++/94346
* c-c++-common/attr-copy.c: New test.

[pr84733] Fix ICE popping local scope

PR c++/84733
* name-lookup.c (do_pushdecl): Look through cleanp levels.

PR c++/94098 - ICE on attribute access redeclaration

gcc/c-family/ChangeLog:

PR c++/94098
* c-attribs.c (handle_access_attribute): Avoid setting TYPE_ATTRIBUTES
here.

gcc/ChangeLog:

PR c++/94098
* calls.c (init_attr_rdwr_indices): Iterate over all access attributes.

gcc/testsuite/ChangeLog:

PR c++/94098
* g++.dg/ext/attr-access-2.C: New test.

amdgcn: refactor mode iterators

The iterative addition of 8 and 16 bit vectors has left the mode iterators in a
bit of a mess. Also, the original names were rather verbose leading to
formatting difficulties.

This patch renames all the vector modes such that they are shorter and tidier.
It does not change the output machine description at all.

2020-03-27 Andrew Stubbs <ams@codesourcery.com>

gcc/
* config/gcn/gcn-valu.md:
(VEC_SUBDWORD_MODE): Rename to V_QIHI throughout.
(VEC_1REG_MODE): Delete.
(VEC_1REG_ALT): Delete.
(VEC_ALL1REG_MODE): Rename to V_1REG throughout.
(VEC_1REG_INT_MODE): Delete.
(VEC_ALL1REG_INT_MODE): Rename to V_INT_1REG throughout.
(VEC_ALL1REG_INT_ALT): Rename to V_INT_1REG_ALT throughout.
(VEC_2REG_MODE): Rename to V_2REG throughout.
(VEC_REG_MODE): Rename to V_noHI throughout.
(VEC_ALLREG_MODE): Rename to V_ALL throughout.
(VEC_ALLREG_ALT): Rename to V_ALL_ALT throughout.
(VEC_ALLREG_INT_MODE): Rename to V_INT throughout.
(VEC_INT_MODE): Delete.
(VEC_FP_MODE): Rename to V_FP throughout and move to top.
(VEC_FP_1REG_MODE): Rename to V_FP_1REG throughout and move to top.
(FP_MODE): Delete and replace with FP throughout.
(FP_1REG_MODE): Delete and replace with FP_1REG throughout.
(VCMP_MODE): Rename to V_noQI throughout and move to top.
(VCMP_MODE_INT): Rename to V_INT_noQI throughout and move to top.
* config/gcn/gcn.md (FP): New mode iterator.
(FP_1REG): New mode iterator.

c++: avoid -Wredundant-tags on a first declaration in use [PR 93824]

-Wredundant-tags doesn't consider type declarations that are also
the first uses of the type, such as in 'void f (struct S);' and
issues false positives for those. According to the reported that's
making it harder to use the warning to clean up LibreOffice.

The attached patch extends -Wredundant-tags to avoid these false
positives by relying on the same class_decl_loc_t::class2loc mapping
as -Wmismatched-tags. The patch also improves the detection
of both issues in template declarations.

gcc/cp/ChangeLog
2020-03-27 Martin Sebor <msebor@redhat.com>

PR c++/94078
PR c++/93824
PR c++/93810
* cp-tree.h (most_specialized_partial_spec): Declare.
* parser.c (cp_parser_elaborated_type_specifier): Distinguish alias
from declarations.
(specialization_of): New function.
(cp_parser_check_class_key): Move code...
(class_decl_loc_t::add): ...to here. Add parameters. Avoid issuing
-Wredundant-tags on first-time declarations in other declarators.
Correct handling of template specializations.
(class_decl_loc_t::diag_mismatched_tags): Also expect to be called
when -Wredundant-tags is enabled. Use primary template or partial
specialization as the guide for uses of implicit instantiations.
* pt.c (most_specialized_partial_spec): Declare extern.

gcc/testsuite/ChangeLog
2020-03-27 Martin Sebor <msebor@redhat.com>

PR c++/94078
PR c++/93824
PR c++/93810
* g++.dg/warn/Wmismatched-tags-3.C: New test.
* g++.dg/warn/Wmismatched-tags-4.C: New test.
* g++.dg/warn/Wmismatched-tags-5.C: New test.
* g++.dg/warn/Wmismatched-tags-6.C: New test.
* g++.dg/warn/Wredundant-tags-3.C: Remove xfails.
* g++.dg/warn/Wredundant-tags-6.C: New test.
* g++.dg/warn/Wredundant-tags-7.C: New test.

c++: Fix ICE after ambiguous inline namespace reopen [PR94257]

Following DR2061, 'namespace F', looks for 'F's inside inline namespaces.
That can result in ambiguous lookups that we failed to diagnose early enough,
leading us to push a new namespace and ICE later. Diagnose the ambiguity
earlier, and then pick one.

PR c++/94257
* name-lookup.c (push_namespace): Triage ambiguous lookups that
contain namespaces.

analyzer: fix malloc pointer NULL-ness

Fixes to exploded_path::feasible_p exposed a pre-existing bug
with pointer NULL-ness for pointers to symbolic_region.

symbolic_region has an "m_possibly_null" flag which if set means
that a region_svalue pointing to that region is treated as possibly
NULL.  Adding a constraint of "!= NULL" on an edge records that
the pointer is non-NULL, but doesn't affect other pointers (e.g.
if the first if a void *, but the other pointers are cast to other
pointer types).  This showed up in the tests
gcc.dg/analyzer/data-model-5b.c and -5c.c, which malloc a buffer
and test for NULL, but then cast that to a struct * and later test
that struct *: a path for the first test being non-NULL and the
second being NULL was erroneously found to be feasible.

This patch clears the m_possibly_null flag when a "!= NULL" constraint
is added, fixing that erroneous path (but not yet fixing the false
positive in the above tests, which seems to go on to hit a different
issue).  It also adds the field to dumps.

gcc/analyzer/ChangeLog:
* program-state.cc (selftest::test_program_state_dumping): Update
expected dump to include symbolic_region's possibly_null field.
* region-model.cc (symbolic_region::print_fields): New vfunc
implementation.
(region_model::add_constraint): Clear m_possibly_null from
symbolic_regions now known to be non-NULL.
(selftest::test_malloc_constraints): New selftest.
(selftest::analyzer_region_model_cc_tests): Call it.
* region-model.h (region::dyn_cast_symbolic_region): Add non-const
overload.
(symbolic_region::dyn_cast_symbolic_region): Implement it.
(symbolic_region::print_fields): New vfunc override decl.

gcc/testsuite/ChangeLog:
* gcc.dg/analyzer/data-model-5b.c: Add xfail for new false
positive leak.
* gcc.dg/analyzer/data-model-5c.c: Likewise.
* gcc.dg/analyzer/malloc-5.c: New test.

analyzer: add new supergraph visualization

This patch extends -fdump-analyzer-supergraph so that rather than just
dumping a DUMP_BASE_NAME.supergraph.dot at the start of analysis, it
also dumps a DUMP_BASE_NAME.supergraph-eg.dot at the end.

The new dump file contains a concise dump of the exploded_graph,
organized with respect to the supergraph and its statements.  The
exploded nodes are colorized to show sm-state, but no other state
is shown.  Per exploded_node saved_diagnostics are also shown,
along with feasibility of the paths to reach them.

I've been finding this a useful way of tracking down issues in
exploded_graphs that are sufficiently large that the output of
-fdump-analyzer-exploded-graph becomes unwieldy.

The patch extends feasiblity-testing so that if the exploded_path
for a saved_diagnostic is found to be infeasible, the reason is
saved and written into the saved_diagnostic, so it can be shown in the
dump.  I've found this very useful when tracking down feasibility
issues.

I'm keeping the initial dump file as it's useful when tracking down
ICEs within the analyzer (which would stop the second dump file being
written).

gcc/analyzer/ChangeLog:
* analyzer.h (class feasibility_problem): New forward decl.
* diagnostic-manager.cc (saved_diagnostic::saved_diagnostic):
Initialize new fields m_status, m_epath_length, and m_problem.
(saved_diagnostic::~saved_diagnostic): Delete m_problem.
(dedupe_candidate::dedupe_candidate): Convert "sd" param from a
const ref to a mutable ptr.
(dedupe_winners::add): Convert "sd" param from a const ref to a
mutable ptr.  Record the length of the exploded_path.  Record the
feasibility/infeasibility of sd into sd, capturing a
feasibility_problem when feasible_p fails, and storing it in sd.
(diagnostic_manager::emit_saved_diagnostics): Update for pass by
ptr rather than by const ref.
* diagnostic-manager.h (class saved_diagnostic): Add new enum
status.  Add fields m_status, m_epath_length and m_problem.
(saved_diagnostic::set_feasible): New member function.
(saved_diagnostic::set_infeasible): New member function.
(saved_diagnostic::get_feasibility_problem): New accessor.
(saved_diagnostic::get_status): New accessor.
(saved_diagnostic::set_epath_length): New member function.
(saved_diagnostic::get_epath_length): New accessor.
* engine.cc: Include "gimple-pretty-print.h".
(exploded_path::feasible_p): Add OUT param and, if non-NULL, write
a new feasibility_problem to it on failure.
(viz_callgraph_node::dump_dot): Convert begin_tr calls to
begin_trtd.  Convert end_tr calls to end_tdtr.
(class exploded_graph_annotator): New subclass of dot_annotator.
(impl_run_checkers): Add a second -fdump-analyzer-supergraph dump
after the analysis runs, using exploded_graph_annotator. dumping
to DUMP_BASE_NAME.supergraph-eg.dot.
* exploded-graph.h (exploded_node::get_dot_fillcolor): Make
public.
(exploded_path::feasible_p): Add OUT param.
(class feasibility_problem): New class.
* state-purge.cc (state_purge_annotator::add_node_annotations):
Return a bool, add a "within_table" param.
(print_vec_of_names): Convert begin_tr calls to begin_trtd.
Convert end_tr calls to end_tdtr.
(state_purge_annotator::add_stmt_annotations): Add "within_row"
param.
* state-purge.h ((state_purge_annotator::add_node_annotations):
Return a bool, add a "within_table" param.
(state_purge_annotator::add_stmt_annotations): Add "within_row"
param.
* supergraph.cc (supernode::dump_dot): Call add_node_annotations
twice: as before, passing false for "within_table", then again
with true when within the TABLE element.  Convert some begin_tr
calls to begin_trtd, and some end_tr calls to end_tdtr.
Repeat each add_stmt_annotations call, distinguishing between
calls that add TRs and those that add TDs to an existing TR.
Add a call to add_after_node_annotations.
* supergraph.h (dot_annotator::add_node_annotations): Add a
"within_table" param.
(dot_annotator::add_stmt_annotations): Add a "within_row" param.
(dot_annotator::add_after_node_annotations): New vfunc.

gcc/ChangeLog:
* doc/invoke.texi (-fdump-analyzer-supergraph): Document that this
now emits two .dot files.
* graphviz.cc (graphviz_out::begin_tr): Only emit a TR, not a TD.
(graphviz_out::end_tr): Only close a TR, not a TD.
(graphviz_out::begin_td): New.
(graphviz_out::end_td): New.
(graphviz_out::begin_trtd): New, replacing the old implementation
of graphviz_out::begin_tr.
(graphviz_out::end_tdtr): New, replacing the old implementation
of graphviz_out::end_tr.
* graphviz.h (graphviz_out::begin_td): New decl.
(graphviz_out::end_td): New decl.
(graphviz_out::begin_trtd): New decl.
(graphviz_out::end_tdtr): New decl.

gcc/testsuite/ChangeLog:
* gcc.dg/analyzer/dot-output.c: Check that
dot-output.c.supergraph-eg.dot is valid.

analyzer: improvements to diagnostic-manager.cc logging

gcc/analyzer/ChangeLog:
* diagnostic-manager.cc (dedupe_winners::add): Show the
exploded_node index in the log messages.
(diagnostic_manager::emit_saved_diagnostics): Log a summary of
m_saved_diagnostics at entry.

analyzer: tweaks to superedge::dump

gcc/analyzer/ChangeLog:
* supergraph.cc (superedge::dump): Add space before description;
move newline to non-pretty_printer overload.

debug/94273 - avoid creating type DIEs for DINFO_LEVEL_TERSE

This avoids completing types for DINFO_LEVEL_TERSE by using
the should_emit_struct_debug machinery.

2020-03-27 Richard Biener <rguenther@suse.de>

PR debug/94273
* dwarf2out.c (should_emit_struct_debug): Return false for
DINFO_LEVEL_TERSE.

* g++.dg/debug/pr94273.C: New testcase.

tree-optimization/94352 - fix uninitialized use of curr_order

This fixes a (harmless) use of a not re-initialized curr_order.

2020-03-27 Richard Biener <rguenther@suse.de>

PR tree-optimization/94352
* tree-ssa-propagate.c (ssa_prop_init): Move seeding of the
worklist ...
(ssa_propagation_engine::ssa_propagate): ... here after
initializing curr_order.

[Fortran] Fix ICE with deferred-rank arrays (PR93957)

PR fortran/93957
* trans-array.c (gfc_alloc_allocatable_for_assignment): Accept
nonallocatable, nonpointer deferred-rank arrays.

PR fortran/93957
* gfortran.dg/assumed_rank_19.f90: New.

Fix PR90332 by extending half size vector mode

As PR90332 shows, the current scalar epilogue peeling for gaps
elimination requires expected vec_init optab with two half size
vector mode. On Power, we don't support vector mode like V8QI,
so can't support optab like vec_initv16qiv8qi. But we want to
leverage existing scalar mode like DI to init the desirable
vector mode. This patch is to extend the existing support for
Power, as evaluated on Power9 we can see expected 1.9% speed up
on SPEC2017 525.x264_r.

As Richi suggested, add one function vector_vector_composition_type
to refactor existing related codes and also make use of it further.

Bootstrapped/regtested on powerpc64le-linux-gnu (LE) P8 and P9,
as well as x86_64-redhat-linux.

gcc/ChangeLog

2020-03-27 Kewen Lin <linkw@gcc.gnu.org>

 PR tree-optimization/90332
 * tree-vect-stmts.c (vector_vector_composition_type): New function.
 (get_group_load_store_type): Adjust to call vector_vector_composition_type,
 extend it to construct with scalar types.
 (vectorizable_load): Likewise.

fixup: move ChangeLog entry for last Arm fix to correct file.

PR target/94220

Fortran] Reject invalid association target (PR93363)

PR fortran/93363
* resolve.c (resolve_assoc_var): Reject association to DT and
function name.

PR fortran/93363
* gfortran.dg/associate_51.f90: Fix test case.
* gfortran.dg/associate_53.f90: New.

c++: Avoid calls in non-evaluated contexts affect whether function can or can't throw [PR94326]

The following testcase FAILs -fcompare-debug, because if we emit a
-Wreturn-local-addr warning, we tsubst decltype in order to print the
warning and as that function could throw, set_flags_from_callee during that
sets cp_function_chain->can_throw and later on we don't set TREE_NOTHROW
on foo. While with -w or -Wno-return-local-addr, tsubst isn't called during
the warning_at, cp_function_chain->can_throw is kept clear and TREE_NOTHROW
is set on foo.
It isn't just a matter of the warning though, in
int foo ();
int bar () { return sizeof (foo ()); }
int baz () { return sizeof (int); }
I don't really see why we should mark only baz as TREE_NOTHROW and not bar
too, when neither can really throw.

2020-03-27 Jakub Jelinek <jakub@redhat.com>

PR c++/94326
* call.c (set_flags_from_callee): Don't update
cp_function_chain->can_throw or current_function_returns_abnormally
if cp_unevaluated_operand.

* g++.dg/other/pr94326.C: New test.

c++: Handle COMPOUND_EXPRs in ocp_convert [PR94339]

My recent change to get_narrower/warnings_for_convert_and_check broke
the following testcase, warnings_for_convert_and_check is upset that
expr is a COMPOUND_EXPR with INTEGER_CST at the rightmost operand, while
result is a COMPOUND_EXPR with a NOP_EXPR of INTEGER_CST at the rightmost
operand, it expects such conversions to be simplified.

The easiest fix seems to be to handle COMPOUND_EXPRs in ocp_convert too,
by converting the rightmost operand and recreating COMPOUND_EXPR(s) if that
changed.

The attr-copy-2.C change is a workaround for PR94346, where we now ICE on
the testcase, while previously we'd ICE only if it contained a comma
expression at the outer level rather than cast of a COMPOUND_EXPR to
something. I'll defer that to Martin.

2020-03-27 Jakub Jelinek <jakub@redhat.com>

PR c++/94339
* cvt.c (ocp_convert): Handle COMPOUND_EXPR by recursion on the second
operand and creating a new COMPOUND_EXPR if anything changed.

* g++.dg/other/pr94339.C: New test.
* g++.dg/ext/attr-copy-2.C: Comment out failing tests due to PR94346.

modulo-sched: fix bootstrap compare-debug issue

This patch removes all debug insns from DDG analysis.  It fixes bootstrap
comparison failure on powerpc64le when running with -fmodulo-sched enabled.

* ddg.c (create_ddg_dep_from_intra_loop_link): Remove assertions.
(create_ddg_dep_no_link): Likewise.
(add_cross_iteration_register_deps): Move debug instruction check.
Other minor refactoring.
(add_intra_loop_mem_dep): Do not check for debug instructions.
(add_inter_loop_mem_dep): Likewise.
(build_intra_loop_deps): Likewise.
(create_ddg): Do not include debug insns into the graph.
* ddg.h (struct ddg): Remove num_debug field.
* modulo-sched.c (doloop_register_get): Adjust condition.
(res_MII): Remove DDG num_debug field usage.
(sms_schedule_by_order): Use assertion against debug insns.
(ps_has_conflicts): Drop debug insn check.

testsuite:

     * gcc.c-torture/execute/pr70127-debug-sms.c: New test.
     * gcc.dg/torture/pr87197-debug-sms.c: New test.

c++: template keyword accepted before destructor names [PR94336]

This came up on the C++ core list recently. We don't diagnose the case
when 'template' is followed by a destructor name which is not permitted
by [temp.names]/5.

PR c++/94336 - template keyword accepted before destructor names.
* parser.c (cp_parser_unqualified_id): Give an error when 'template'
is followed by a destructor name.

* g++.dg/template/template-keyword2.C: New test.

c++: Remove redundant calls to type_dependent_expression_p

This simplifies conditions that test both value_dependent_expression_p and
type_dependent_expression_p, since the former predicate now subsumes the latter.

gcc/cp/ChangeLog:

* decl.c (compute_array_index_type_loc): Remove redundant
type_dependent_expression_p check that is subsumed by
value_dependent_expression_p.
* decl2.c (is_late_template_attribute): Likewise.
* pt.c (uses_template_parms): Likewise.
(dependent_template_arg_p): Likewise.

coroutines, testsuite: Fix symmetric-transfer-00-basic.C on Linux.

In order for the test output to work we need to include
cstdio.

2020-03-27 Iain Sandoe <iain@sandoe.co.uk>

* g++.dg/coroutines/torture/symmetric-transfer-00-basic.C:
Add <cstdio>.

Daily bump.

Update gcc .po files.

* be.po, da.po, de.po, el.po, es.po, fi.po, fr.po, hr.po, id.po,
ja.po, nl.po, ru.po, sr.po, sv.po, tr.po, uk.po, vi.po, zh_CN.po,
zh_TW.po: Update.

c++: DR1710, template keyword in a typename-specifier [PR94057]

Consider

 template <typename T> class A {
 template <typename U> class B {
 void fn(typename A<T>::B);
 };
 };

which is rejected with
error: 'typename A<T>::B' names 'template<class T> template<class U> class A<T>::B', which is not a type
whereas clang/icc/msvc accept it.

"typename A<T>::B" is a typename-specifier. Sadly, our comments
don't mention it anywhere, because the typename-specifier wasn't in C++11;
it was only added to the language in N1376. Instead, we handle it as
an elaborated-type-specifier (not a problem thus far). So we get to
cp_parser_nested_name_specifier_opt which has a loop that breaks if we
don't see a < or ::, but that means we can -- tentatively -- parse even
B which is not a nested-name-specifier (it doesn't end with a ::).

I think this should compile because [temp.names]/4 says: "In a qualified-id
used as the name in a typename-specifier, elaborated-type-specifier,
using-declaration, or class-or-decltype, an optional keyword template
appearing at the top level is ignored.", added in DR 1710. Also see
DR 1812.

This issue on its own is not a significant problem or a regression.
However, in C++20, the typename here becomes optional, and so this test
is rejected in C++20, but accepted in C++17:

 template <typename T> class A {
 template <typename U> class B {
 void fn(A<T>::B);
 };
 };

Here we morph A<T>::B into a typename-specifier, but that happens
in cp_parser_simple_type_specifier and we never handle it as above.
To fake the template keyword I'm afraid we need to use cp_parser_template_id
with template_keyword_p=true as in the patch below. The tricky thing
is to avoid breaking concepts.

To handle DR 1710, I made cp_parser_nested_name_specifier_opt assume that
when we're naming a type, the template keyword is present, too. That
revealed a bug: DR 1710 also says that the template keyword can be followed
by an alias template, but we weren't prepared to handle that. alias-decl?.C
exercise this.

gcc/cp:

DR 1710
PR c++/94057 - template keyword in a typename-specifier.
* parser.c (check_template_keyword_in_nested_name_spec): New.
(cp_parser_nested_name_specifier_opt): Implement DR1710, optional
'template'. Call check_template_keyword_in_nested_name_spec.
(cp_parser_simple_type_specifier): Assume that a <
following a qualified-id in a typename-specifier begins
a template argument list.

gcc/testsuite:

DR 1710
PR c++/94057 - template keyword in a typename-specifier.
* g++.dg/cpp1y/alias-decl1.C: New test.
* g++.dg/cpp1y/alias-decl2.C: New test.
* g++.dg/cpp1y/alias-decl3.C: New test.
* g++.dg/parse/missing-template1.C: Update dg-error.
* g++.dg/parse/template3.C: Likewise.
* g++.dg/template/error4.C: Likewise.
* g++.dg/template/meminit2.C: Likewise.
* g++.dg/template/dependent-name5.C: Likewise.
* g++.dg/template/dependent-name7.C: New test.
* g++.dg/template/dependent-name8.C: New test.
* g++.dg/template/dependent-name9.C: New test.
* g++.dg/template/dependent-name10.C: New test.
* g++.dg/template/dependent-name11.C: New test.
* g++.dg/template/dependent-name12.C: New test.
* g++.dg/template/dependent-name13.C: New test.
* g++.dg/template/dr1794.C: New test.
* g++.dg/template/dr314.C: New test.
* g++.dg/template/dr1710.C: New test.
* g++.dg/template/dr1710-2.C: New test.
* g++.old-deja/g++.pt/crash38.C: Update dg-error.

coroutines: Implement n4849 recommended symmetric transfer.

Although the note in the text [expr.await] / 5.1.1 is not normative,
it is asserted by users that an implementation that is unable to
perform unlimited symmetric transfers is not terribly useful.

This relates to the following circumstance:

try {
users-function-body:
{
 ....
 { some suspend context
 continuation_handle = await_suspend (another handle);
 continuation_handle.resume ();
 'return' (actually a suspension operation).
 }
 }
} catch (...) {}

The call to 'continuation_handle.resume ()' needs to be a tail-
call in order that an arbitrary number of coroutines can be handled
in this manner. There are two issues with this:

1. That the user's function body is wrapped in a try/catch block and
 one cannot tail-call from within those.

2. That GCC doesn't usually produce tail-calls when the optimisation
 level is < O2.

After considerable discussion at WG21 meetings, it has been determined
that the intent is that the operation behaves as if the resume call is
executed in the context of the caller.

So, we can remap the fragment above like this:

{
 void_coroutine_handle continuation;

 try {
 users-function-body:
 {
 ....
 { some suspend context
 continuation = await_suspend (another handle);
 <scope exit without cleanup> symmetric_transfer;
 }
 }
 } catch (...) {}

symmetric_transfer:
 continuation.resume(); [tail call] [must tail call]
}

Thus we take the call outside the try-catch block which solves
issue (1) and mark it as a tail call and as "must tail call" for
correctness which solves (2).

As bonuses, since we no longer need to differentiate handle types
returned from await_suspend() methods, nor do we need to keep them
in the coroutine frame, since they are ephemeral, we save entries in
the frame and reduce some code too.

gcc/cp/ChangeLog:

2020-03-26 Iain Sandoe <iain@sandoe.co.uk>

* coroutines.cc (coro_init_identifiers): Initialize an identifier
for the cororoutine handle 'address' method name.
(struct coro_aw_data): Add fields to cover the continuations.
(co_await_expander): Determine the kind of await_suspend in use.
If we have the case that returns a continuation handle, then save
this and make the target for 'scope exit without cleanup' be the
continuation resume label.
(expand_co_awaits): Remove.
(struct suspend_point_info): Remove fields that kept the returned
await_suspend handle type.
(transform_await_expr): Remove code tracking continuation handles.
(build_actor_fn): Add the continuation handle as an actor-function
scope var. Build the symmetric transfer continuation point. Call
the tree walk for co_await expansion directly, rather than via a
trivial shim function.
(register_await_info): Remove fields tracking continuation handles.
(get_await_suspend_return_type): Remove.
(register_awaits): Remove code tracking continuation handles.
(morph_fn_to_coro): Remove code tracking continuation handles.

gcc/testsuite/ChangeLog:

2020-03-26 Iain Sandoe <iain@sandoe.co.uk>

* g++.dg/coroutines/torture/co-ret-09-bool-await-susp.C: Amend
to n4849 behaviour.
* g++.dg/coroutines/torture/symmetric-transfer-00-basic.C: New
test.

coroutines: Implement n4849 changes to exception handling.

The standard now calls up a revised mechanism to handle exceptions
where exceptions thrown by the await_resume () method of the
initial suspend expression are considered in the same manner as
exceptions thrown by the user-authored function body.

This implements [dcl.fct.def.coroutine] / 5.3.

gcc/cp/ChangeLog:

2020-03-26 Iain Sandoe <iain@sandoe.co.uk>

* coroutines.cc (co_await_expander): If we are expanding the
initial await expression, set a boolean flag to show that we
have now reached the initial await_resume() method call.
(expand_co_awaits): Handle the 'initial await resume called' flag.
(build_actor_fn): Insert the initial await expression into the
start of the user-authored function-body. Handle the 'initial await
resume called' flag.
(morph_fn_to_coro): Initialise the 'initial await resume called'
flag. Modify the unhandled exception catch clause to recognise
exceptions that occur before the initial await_resume() and re-
throw them.

gcc/testsuite/ChangeLog:

2020-03-26 Iain Sandoe <iain@sandoe.co.uk>

* g++.dg/coroutines/torture/exceptions-test-01-n4849-a.C: New test.

libstdc++: Add some C++20 additions to <chrono>

* include/std/chrono (chrono::days, chrono::weeks, chrono::years)
(chrono::months, chrono::sys_days, chrono::local_t)
(chrono::local_time, chrono::local_seconds, chrono::local_days):
Define for C++20.
(chrono::time_point): Add missing static assert.
* testsuite/20_util/time_point/requirements/duration_neg.cc: New test.
* testsuite/std/time/clock/file/overview.cc: New test.
* testsuite/std/time/clock/file/members.cc: New test.
* testsuite/std/time/syn_c++20.cc: New test.

arm: unified syntax for libgcc when built with -Os [PR94220]

The recent patch to convert all thumb1 code in libgcc to unified syntax
ommitted the conditional code that is used only when building the library
for minimal size. This patch fixes this case.

I've also fixed the COND macro so that a single definition is always used
that is for unified syntax. This eliminates a warning that is now being
seen from the assembler when compiling the ieee fp support code.

PR target/94220
* config/arm/lib1funcs.asm (COND): Use a single definition for
unified syntax.
(aeabi_uidivmod): Unified syntax when optimizing Thumb for size.
(aeabi_idivmod): Likewise.
(divsi3_skip_div0_test): Likewise.

Fix UNRESOLVED test-case.

* gcc.target/i386/pr81213.c: Do not scan assembler
and add one missing PR entry.

tree: Fix -fcompare-debug issues due to protected_set_expr_location [PR94323]

The following testcase FAILs since recently when the C++ FE started calling
protected_set_expr_location more often.
With -g, it is called on a STATEMENT_LIST that contains a DEBUG_BEGIN_STMT
and CLEANUP_POINT_EXPR, and as STATEMENT_LISTs have !CAN_HAVE_LOCATION_P,
nothing is set. Without -g, it is called instead on the CLEANUP_POINT_EXPR
directly and changes its location.

The following patch recurses on the single non-DEBUG_BEGIN_STMT statement
of a STATEMENT_LIST if any to make the two behave the same.

2020-03-26 Jakub Jelinek <jakub@redhat.com>

PR debug/94323
* tree.c (protected_set_expr_location): Recurse on STATEMENT_LIST
that contains exactly one non-DEBUG_BEGIN_STMT statement.

* g++.dg/debug/pr94323.C: New test.

Skip test for non-x86 targets.

PR testsuite/94334
* gcc.dg/lto/pr94271_0.c: Skip for non-x86 targets
and add ifunc effective target.
* gcc.target/i386/pr81213-2.c: Add ifunc effective target.

gimplify: Fix -fcompare-debug differences caused by gimplify_body [PR94281]

The following testcase FAILs, because gimplify_body adds a GIMPLE_NOP only
when there are no statements in the function and with -g there is a
DEBUG_BEGIN_STMT, so it doesn't add it and due to -fno-tree-dce that never
gets removed afterwards. Similarly, if the body seq after gimplification
contains some DEBUG_BEGIN_STMTs plus a single gbind, then we could behave
differently between -g0 and -g, by using that gbind as the body in the -g0
case and not in the -g case.
This patch fixes that by ignoring DEBUG_BEGIN_STMTs (other debug stmts can't
appear at this point yet thankfully) during decisions and if we pick the
single gbind and there are DEBUG_BEGIN_STMTs next to it, it moves them into
the gbind.
While debugging this, I found also a bug in the gimple_seq_last_nondebug_stmt
function, for a seq that has a single non-DEBUG_BEGIN_STMT statement
followed by one or more DEBUG_BEGIN_STMTs it would return NULL rather than
the first statement.

2020-03-26 Jakub Jelinek <jakub@redhat.com>

PR debug/94281
* gimple.h (gimple_seq_first_nondebug_stmt): New function.
(gimple_seq_last_nondebug_stmt): Don't return NULL if seq contains
a single non-debug stmt followed by one or more debug stmts.
* gimplify.c (gimplify_body): Use gimple_seq_first_nondebug_stmt
instead of gimple_seq_first_stmt, use gimple_seq_first_nondebug_stmt
and gimple_seq_last_nondebug_stmt instead of gimple_seq_first and
gimple_seq_last to check if outer_stmt gbind could be reused and
if yes and it is surrounded by any debug stmts, move them into the
gbind body.

* g++.dg/debug/pr94281.C: New test.

c++: Fix up user_provided_p [PR81349]

The standard says: "A function is user-provided if it is user-declared and
not explicitly defaulted or deleted on its first declaration."
I don't see anything about function templates having different rules here,
but user_provided_p does return true for all TEMPLATE_DECLs.

The following patch fixes it by treating as user-provided only templates
that aren't deleted.

2020-03-26 Jakub Jelinek <jakub@redhat.com>

PR c++/81349
* class.c (user_provided_p): Use STRIP_TEMPLATE instead of returning
true for all TEMPLATE_DECLs.

* g++.dg/cpp1z/pr81349.C: New test.

c++: Fix a -fcompare-debug issue with DEBUG_BEGIN_STMT stmts in STATEMENT_LISTs [PR94272]

The following testcase FAILs with -fcompare-debug. The problem is that
the C++ FE initially uses IF_STMTs, tcc_statement which default to
TREE_SIDE_EFFECTS set, but later on is genericized into COND_EXPRs,
tcc_expression which default to TREE_SIDE_EFFECTS ored from all 3 operands.
Furthermore, with -g we emit by default DEBUG_BEGIN_STMTs (TREE_SIDE_EFFECTS
clear) and so end up with a STATEMENT_LIST containing DEBUG_BEGIN_STMT
+ e.g. the IF_STMT, while with -g0 we would end up with just the IF_STMT
alone and in that case there is no STATEMENT_LIST wrapping it.

Now, the STATEMENT_LIST has TREE_SIDE_EFFECTS set to match the IF_STMT,
but if none of the 3 operands (condition and both branches) have
TREE_SIDE_EFFECTS, genericize_if_stmt will replace the IF_STMT with
COND_EXPR without TREE_SIDE_EFFECTS, but with -g only STATEMENT_LIST
wrapping it will keep TREE_SIDE_EFFECTS. Then during gimplification,
shortcut_cond_expr checks TREE_SIDE_EFFECTS of the operands and as it
is differennt between -g and -g0, will generate different code.

The following patch attempts to fix this by clearing TREE_SIDE_EFFECTS
on STATEMENT_LISTs that initially have it set and contain only
DEBUG_BEGIN_STMT or at most one other statement that lost TREE_SIDE_EFFECTS
during the genericization.

2020-03-26 Jakub Jelinek <jakub@redhat.com>

PR c++/94272
* cp-gimplify.c (cp_genericize_r): Handle STATEMENT_LIST.

* g++.dg/debug/pr94272.C: New test.

var-tracking: Mark as sp based more VALUEs [PR92264]

With this simple patch, on i686-linux and x86_64-linux with -m32 (no change
for -m64), the find_base_term visited_vals.length () > 100 find_base_term
statistics changed (fbt is before this patch, fbt2 with this patch):
for k in '' '1$'; do for i in 32 64; do for j in fbt fbt2; do \
echo -n "$j $i $k "; LC_ALL=C grep ^$i.*"$k" $j | wc -l; done; done; done
fbt 32 5313355
fbt2 32 4229854
fbt 64 217523
fbt2 64 217523
fbt 32 1$ 1296
fbt2 32 1$ 407
fbt 64 1$ 0
fbt2 64 1$ 0
For frame_pointer_needed functions, we need to wait until we see the
fp_setter insn in the prologue at which point we disassociate the fp based
VALUEs from sp based VALUEs, but for !frame_pointer_needed functions,
we IMHO don't need to wait anything. For ACCUMULATE_OUTGOING_ARGS it isn't
IMHO worth doing anything, as there is a single sp adjustment and so there
is no risk of many thousands deep VALUE chains, but for
!ACCUMULATE_OUTGOING_ARGS the sp keeps changing constantly.

2020-03-26 Jakub Jelinek <jakub@redhat.com>

PR rtl-optimization/92264
* var-tracking.c (add_stores): Call cselib_set_value_sp_based even
for sp based values in !frame_pointer_needed
&& !ACCUMULATE_OUTGOING_ARGS functions.

widening_mul: restrict ops to be defined in the same basic-block when convert plusminus to widen

In the testcase for PR94269, widening_mul moves two multiply
instructions from outside the loop to inside
the loop, merging with two add instructions separately. This
increases the cost of the loop. Like FMA detection
in the same pass, simply restrict ops to be defined in the same
basic-block to avoid possibly moving multiply
to a different block with a higher execution frequency.

2020-03-26 Felix Yang <felix.yang@huawei.com>

PR tree-optimization/94269
* tree-ssa-math-opts.c (convert_plusminus_to_widen): Restrict
this
operation to single basic block.

* gcc.dg/pr94269.c: New test.

Daily bump.

[PATCH] rs6000: vec_rlnm fix to make builtin work according to ABI

gcc/ChangeLog

2020-03-25 Carl Love <cel@us.ibm.com>

PR target/93819
* gcc/config/rs6000/altivec.h:
Fixed swapped arguments for vec_rlnm define.

libstdc++: Fix author in previous ChangeLog entry

The previous commit added two tests which were written by Mike Crowe,
not by me. This fixes the ChangeLog entry.

libstdc++ Add missing tests for std::shared_timed_mutex

These tests were supposed to be committed as part of r278904 (aka
b789efeae8c0620b83f25e4a0757c4871e02ab5f) but I didn't 'git add' them.

* testsuite/30_threads/shared_timed_mutex/try_lock_until/1.cc: New
test.
* testsuite/30_threads/shared_timed_mutex/try_lock_until/2.cc: New
test.

libstdc++: Define and use chrono::is_clock for C++20

For C++20 the wait_until members of mutexes and condition variables are
required to be ill-formed if given a clock that doesn't meet the
requirements for a clock type. To implement that requirement this patch
adds static assertions using the chrono::is_clock trait, and defines
that trait.

To avoid expensive checks for the common cases, the trait (and
associated variable template) are explicitly specialized for the
standard clock types.

This also moves the filesystem::__file_clock type from <filesystem> to
<chrono>, so that chrono::file_clock and chrono::file_time can be
defined in <chrono> as required.

* include/bits/fs_fwd.h (filesystem::__file_clock): Move to ...
* include/std/chrono (filesystem::__file_clock): Here.
(filesystem::__file_clock::from_sys, filesystem::__file_clock::to_sys):
Define public member functions for C++20.
(is_clock, is_clock_v): Define traits for C++20.
* include/std/condition_variable (condition_variable::wait_until): Add
check for valid clock.
* include/std/future (_State_baseV2::wait_until): Likewise.
* include/std/mutex (__timed_mutex_impl::_M_try_lock_until): Likewise.
* include/std/shared_mutex (shared_timed_mutex::try_lock_shared_until):
Likewise.
* include/std/thread (this_thread::sleep_until): Likewise.
* testsuite/30_threads/condition_variable/members/2.cc: Qualify
slow_clock with new namespace.
* testsuite/30_threads/condition_variable/members/clock_neg.cc: New
test.
* testsuite/30_threads/condition_variable_any/members/clock_neg.cc:
New test.
* testsuite/30_threads/future/members/clock_neg.cc: New test.
* testsuite/30_threads/recursive_timed_mutex/try_lock_until/3.cc:
Qualify slow_clock with new namespace.
* testsuite/30_threads/recursive_timed_mutex/try_lock_until/
clock_neg.cc: New test.
* testsuite/30_threads/shared_future/members/clock_neg.cc: New
test.
* testsuite/30_threads/shared_lock/locking/clock_neg.cc: New test.
* testsuite/30_threads/shared_timed_mutex/try_lock_until/clock_neg.cc:
New test.
* testsuite/30_threads/timed_mutex/try_lock_until/3.cc: Qualify
slow_clock with new namespace.
* testsuite/30_threads/timed_mutex/try_lock_until/4.cc: Likewise.
* testsuite/30_threads/timed_mutex/try_lock_until/clock_neg.cc: New
test.
* testsuite/30_threads/unique_lock/locking/clock_neg.cc: New test.
* testsuite/std/time/traits/is_clock.cc: New test.
* testsuite/util/slow_clock.h (slow_clock): Move to __gnu_test
namespace.

testsuite: adjustments for amdgcn

2020-03-25 Andrew Stubbs <ams@codesourcery.com>

gcc/testsuite/
* gcc.dg/vect/bb-slp-pr69907.c: Disable the dump scan for amdgcn.
* lib/target-supports.exp (check_effective_target_vect_unpack):
Add amdgcn.

Fix vector-compare-1 regressions on sh4/sh4eb caused by pattern clobbering T reg without expressing that in its RTL.

            PR rtl-optimization/90275
            * config/sh/sh.md (mov_neg_si_t): Clobber the T register in the
            pattern.

Fix vector-compare-1 regressions on sh4/sh4eb caused by pattern clobbering T reg without expressing that in its RTL.

PR rtl-optimization/90275
* config/sh/sh.md (mov_neg_si_t): Clobber the T register in the
pattern.