From d989dba8ef02c2406b7c9e62b352197dffc6b880 Mon Sep 17 00:00:00 2001 From: Tom de Vries Date: Fri, 3 Aug 2018 11:21:09 +0000 Subject: [PATCH] [c++] Don't emit exception tables for UI_NONE If a target does not support exceptions, it can indicate this by returning UI_NONE in TARGET_EXCEPT_UNWIND_INFO. Currently the compiler still emits exception tables for such a target. This patch makes sure that no exception tables are emitted if the target does not support exceptions. This allows us to remove a workaround in TARGET_ASM_BYTE_OP in the nvptx port. Build on x86_64 with nvptx accelerator, and tested libgomp. Build and reg-tested on x86_64. 2018-08-03 Tom de Vries * common/config/nvptx/nvptx-common.c (nvptx_except_unwind_info): Return UI_NONE. * config/nvptx/nvptx.c (TARGET_ASM_BYTE_OP): Remove define. * except.c (output_function_exception_table): Do early exit if targetm_common.except_unwind_info (&global_options) == UI_NONE. From-SVN: r263287 --- gcc/ChangeLog | 8 ++++++++ gcc/common/config/nvptx/nvptx-common.c | 2 +- gcc/config/nvptx/nvptx.c | 3 --- gcc/except.c | 3 ++- 4 files changed, 11 insertions(+), 5 deletions(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 88553407612..8d2814b19b3 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,11 @@ +2018-08-03 Tom de Vries + + * common/config/nvptx/nvptx-common.c (nvptx_except_unwind_info): Return + UI_NONE. + * config/nvptx/nvptx.c (TARGET_ASM_BYTE_OP): Remove define. + * except.c (output_function_exception_table): Do early exit if + targetm_common.except_unwind_info (&global_options) == UI_NONE. + 2018-08-03 Martin Liska * predict.c (dump_prediction): Change to 2 digits diff --git a/gcc/common/config/nvptx/nvptx-common.c b/gcc/common/config/nvptx/nvptx-common.c index f31e0696281..3a124e8844d 100644 --- a/gcc/common/config/nvptx/nvptx-common.c +++ b/gcc/common/config/nvptx/nvptx-common.c @@ -33,7 +33,7 @@ along with GCC; see the file COPYING3. If not see enum unwind_info_type nvptx_except_unwind_info (struct gcc_options *opts ATTRIBUTE_UNUSED) { - return UI_TARGET; + return UI_NONE; } #undef TARGET_HAVE_NAMED_SECTIONS diff --git a/gcc/config/nvptx/nvptx.c b/gcc/config/nvptx/nvptx.c index 62fefda8612..c0b0a2ec3ab 100644 --- a/gcc/config/nvptx/nvptx.c +++ b/gcc/config/nvptx/nvptx.c @@ -6051,9 +6051,6 @@ nvptx_can_change_mode_class (machine_mode, machine_mode, reg_class_t) #undef TARGET_HAVE_SPECULATION_SAFE_VALUE #define TARGET_HAVE_SPECULATION_SAFE_VALUE speculation_safe_value_not_needed -#undef TARGET_ASM_BYTE_OP -#define TARGET_ASM_BYTE_OP "// .byte " - struct gcc_target targetm = TARGET_INITIALIZER; #include "gt-nvptx.h" diff --git a/gcc/except.c b/gcc/except.c index 84666d9041e..728b1e1d349 100644 --- a/gcc/except.c +++ b/gcc/except.c @@ -3189,7 +3189,8 @@ output_function_exception_table (int section) rtx personality = get_personality_function (current_function_decl); /* Not all functions need anything. */ - if (!crtl->uses_eh_lsda) + if (!crtl->uses_eh_lsda + || targetm_common.except_unwind_info (&global_options) == UI_NONE) return; /* No need to emit any boilerplate stuff for the cold part. */ -- 2.30.2