From f06e47d7b644b4598a85f89eb76c13298e6e5d9f Mon Sep 17 00:00:00 2001 From: Jakub Jelinek Date: Thu, 29 Nov 2018 15:32:00 +0100 Subject: [PATCH] re PR target/88152 (optimize SSE & AVX char compares with subsequent movmskb) PR target/88152 * tree.h (build_uniform_cst, uniform_integer_cst_p): Declare. * tree.c (build_uniform_cst, uniform_integer_cst_p): New functions. * match.pd (define_predicates): Add uniform_integer_cst_p. (cmp @0 INTEGER_CST@1, cmp (convert?@2 @0) INTEGER_CST@1): Adjust so that it works also for vector comparisons with uniform constants with INTEGER_CST element. * g++.dg/tree-ssa/pr88152-1.C: New test. * g++.dg/tree-ssa/pr88152-2.C: New test. From-SVN: r266620 --- gcc/ChangeLog | 8 +++ gcc/match.pd | 74 ++++++++++++++------ gcc/testsuite/ChangeLog | 4 ++ gcc/testsuite/g++.dg/tree-ssa/pr88152-1.C | 55 +++++++++++++++ gcc/testsuite/g++.dg/tree-ssa/pr88152-2.C | 85 +++++++++++++++++++++++ gcc/tree.c | 32 +++++++++ gcc/tree.h | 7 ++ 7 files changed, 242 insertions(+), 23 deletions(-) create mode 100644 gcc/testsuite/g++.dg/tree-ssa/pr88152-1.C create mode 100644 gcc/testsuite/g++.dg/tree-ssa/pr88152-2.C diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 5fe36e07b9c..fcf4cf7a19c 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,13 @@ 2018-11-29 Jakub Jelinek + PR target/88152 + * tree.h (build_uniform_cst, uniform_integer_cst_p): Declare. + * tree.c (build_uniform_cst, uniform_integer_cst_p): New functions. + * match.pd (define_predicates): Add uniform_integer_cst_p. + (cmp @0 INTEGER_CST@1, cmp (convert?@2 @0) INTEGER_CST@1): Adjust + so that it works also for vector comparisons with uniform constants + with INTEGER_CST element. + PR target/88234 * config/rs6000/rs6000.c (rs6000_gimple_fold_builtin): For vec_add and vec_sub builtins, perform PLUS_EXPR or MINUS_EXPR diff --git a/gcc/match.pd b/gcc/match.pd index e9f9e0c08f7..6c267510adf 100644 --- a/gcc/match.pd +++ b/gcc/match.pd @@ -34,6 +34,7 @@ along with GCC; see the file COPYING3. If not see tree_expr_nonzero_p integer_valued_real_p integer_pow2p + uniform_integer_cst_p HONOR_NANS) /* Operator lists. */ @@ -3107,16 +3108,22 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT) (for cmp (le gt) acmp (lt ge) (simplify - (cmp @0 INTEGER_CST@1) - (if (tree_int_cst_sgn (@1) == -1) - (acmp @0 { wide_int_to_tree (TREE_TYPE (@1), wi::to_wide (@1) + 1); })))) + (cmp @0 uniform_integer_cst_p@1) + (with { tree cst = uniform_integer_cst_p (@1); } + (if (tree_int_cst_sgn (cst) == -1) + (acmp @0 { build_uniform_cst (TREE_TYPE (@1), + wide_int_to_tree (TREE_TYPE (cst), + wi::to_wide (cst) + + 1)); }))))) (for cmp (ge lt) acmp (gt le) (simplify - (cmp @0 INTEGER_CST@1) - (if (tree_int_cst_sgn (@1) == 1) - (acmp @0 { wide_int_to_tree (TREE_TYPE (@1), wi::to_wide (@1) - 1); })))) - + (cmp @0 uniform_integer_cst_p@1) + (with { tree cst = uniform_integer_cst_p (@1); } + (if (tree_int_cst_sgn (cst) == 1) + (acmp @0 { build_uniform_cst (TREE_TYPE (@1), + wide_int_to_tree (TREE_TYPE (cst), + wi::to_wide (cst) - 1)); }))))) /* We can simplify a logical negation of a comparison to the inverted comparison. As we cannot compute an expression @@ -3934,19 +3941,22 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT) /* Comparisons with the highest or lowest possible integer of the specified precision will have known values. */ (simplify - (cmp (convert?@2 @0) INTEGER_CST@1) - (if ((INTEGRAL_TYPE_P (TREE_TYPE (@1)) || POINTER_TYPE_P (TREE_TYPE (@1))) + (cmp (convert?@2 @0) uniform_integer_cst_p@1) + (if ((INTEGRAL_TYPE_P (TREE_TYPE (@1)) + || POINTER_TYPE_P (TREE_TYPE (@1)) + || VECTOR_INTEGER_TYPE_P (TREE_TYPE (@1))) && tree_nop_conversion_p (TREE_TYPE (@2), TREE_TYPE (@0))) (with { - tree arg1_type = TREE_TYPE (@1); + tree cst = uniform_integer_cst_p (@1); + tree arg1_type = TREE_TYPE (cst); unsigned int prec = TYPE_PRECISION (arg1_type); wide_int max = wi::max_value (arg1_type); wide_int signed_max = wi::max_value (prec, SIGNED); wide_int min = wi::min_value (arg1_type); } (switch - (if (wi::to_wide (@1) == max) + (if (wi::to_wide (cst) == max) (switch (if (cmp == GT_EXPR) { constant_boolean_node (false, type); }) @@ -3956,7 +3966,7 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT) { constant_boolean_node (true, type); }) (if (cmp == LT_EXPR) (ne @2 @1)))) - (if (wi::to_wide (@1) == min) + (if (wi::to_wide (cst) == min) (switch (if (cmp == LT_EXPR) { constant_boolean_node (false, type); }) @@ -3966,19 +3976,31 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT) { constant_boolean_node (true, type); }) (if (cmp == GT_EXPR) (ne @2 @1)))) - (if (wi::to_wide (@1) == max - 1) + (if (wi::to_wide (cst) == max - 1) (switch (if (cmp == GT_EXPR) - (eq @2 { wide_int_to_tree (TREE_TYPE (@1), wi::to_wide (@1) + 1); })) + (eq @2 { build_uniform_cst (TREE_TYPE (@1), + wide_int_to_tree (TREE_TYPE (cst), + wi::to_wide (cst) + + 1)); })) (if (cmp == LE_EXPR) - (ne @2 { wide_int_to_tree (TREE_TYPE (@1), wi::to_wide (@1) + 1); })))) - (if (wi::to_wide (@1) == min + 1) + (ne @2 { build_uniform_cst (TREE_TYPE (@1), + wide_int_to_tree (TREE_TYPE (cst), + wi::to_wide (cst) + + 1)); })))) + (if (wi::to_wide (cst) == min + 1) (switch (if (cmp == GE_EXPR) - (ne @2 { wide_int_to_tree (TREE_TYPE (@1), wi::to_wide (@1) - 1); })) + (ne @2 { build_uniform_cst (TREE_TYPE (@1), + wide_int_to_tree (TREE_TYPE (cst), + wi::to_wide (cst) + - 1)); })) (if (cmp == LT_EXPR) - (eq @2 { wide_int_to_tree (TREE_TYPE (@1), wi::to_wide (@1) - 1); })))) - (if (wi::to_wide (@1) == signed_max + (eq @2 { build_uniform_cst (TREE_TYPE (@1), + wide_int_to_tree (TREE_TYPE (cst), + wi::to_wide (cst) + - 1)); })))) + (if (wi::to_wide (cst) == signed_max && TYPE_UNSIGNED (arg1_type) /* We will flip the signedness of the comparison operator associated with the mode of @1, so the sign bit is @@ -3990,10 +4012,16 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT) /* The following case also applies to X < signed_max+1 and X >= signed_max+1 because previous transformations. */ (if (cmp == LE_EXPR || cmp == GT_EXPR) - (with { tree st = signed_type_for (arg1_type); } - (if (cmp == LE_EXPR) - (ge (convert:st @0) { build_zero_cst (st); }) - (lt (convert:st @0) { build_zero_cst (st); })))))))))) + (with { tree st = signed_type_for (TREE_TYPE (@1)); } + (switch + (if (cst == @1 && cmp == LE_EXPR) + (ge (convert:st @0) { build_zero_cst (st); })) + (if (cst == @1 && cmp == GT_EXPR) + (lt (convert:st @0) { build_zero_cst (st); })) + (if (cmp == LE_EXPR) + (ge (view_convert:st @0) { build_zero_cst (st); })) + (if (cmp == GT_EXPR) + (lt (view_convert:st @0) { build_zero_cst (st); }))))))))))) (for cmp (unordered ordered unlt unle ungt unge uneq ltgt) /* If the second operand is NaN, the result is constant. */ diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 0e908be06d1..b75b80d9c82 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,5 +1,9 @@ 2018-11-29 Jakub Jelinek + PR target/88152 + * g++.dg/tree-ssa/pr88152-1.C: New test. + * g++.dg/tree-ssa/pr88152-2.C: New test. + PR target/88234 * gcc.dg/ubsan/pr88234.c: New test. diff --git a/gcc/testsuite/g++.dg/tree-ssa/pr88152-1.C b/gcc/testsuite/g++.dg/tree-ssa/pr88152-1.C new file mode 100644 index 00000000000..423ec897c1d --- /dev/null +++ b/gcc/testsuite/g++.dg/tree-ssa/pr88152-1.C @@ -0,0 +1,55 @@ +// PR target/88152 +// { dg-do compile } +// { dg-options "-O2 -std=c++14 -fdump-tree-forwprop1" } +// { dg-final { scan-tree-dump-times " (?:<|>=) \{ 0\[, ]" 120 "forwprop1" } } + +template +using V [[gnu::vector_size (sizeof (T) * N)]] = T; + +void *foo (); + +template +__attribute__((noipa)) void +test_uns () +{ + V *x = (V *) foo (); + x[1] = x[0] > max; + x[3] = x[2] >= maxp1; + x[5] = x[4] <= max; + x[7] = x[6] < maxp1; +} + +template +__attribute__((noipa)) void +test () +{ + V *x = (V *) foo (); + x[1] = x[0] >= 0; + x[3] = x[2] > -1; + x[5] = x[4] < 0; + x[7] = x[6] <= -1; +} + +template +__attribute__((noipa)) void +tests () +{ + test_uns (); + test (); + test_uns (); + test (); + test_uns (); + test (); + test_uns (); + test (); + test_uns (); + test (); +} + +void +all_tests () +{ + tests<1> (); + tests<2> (); + tests<8> (); +} diff --git a/gcc/testsuite/g++.dg/tree-ssa/pr88152-2.C b/gcc/testsuite/g++.dg/tree-ssa/pr88152-2.C new file mode 100644 index 00000000000..69118b4ea36 --- /dev/null +++ b/gcc/testsuite/g++.dg/tree-ssa/pr88152-2.C @@ -0,0 +1,85 @@ +// PR target/88152 +// { dg-do compile { target int32 } } +// { dg-options "-O2 -Wno-psabi -fdump-tree-forwprop1" } +// { dg-final { scan-tree-dump-not " (?:>|>=|<|<=) \{ 214748364\[67]" "forwprop1" } } +// { dg-final { scan-tree-dump-not " (?:>|>=|<|<=) \{ -214748364\[78]" "forwprop1" } } +// { dg-final { scan-tree-dump-times "(?:return| =) \{ 0, 0, 0, 0 \}" 2 "forwprop1" } } +// { dg-final { scan-tree-dump-times "(?:return| =) \{ -1, -1, -1, -1 \}" 2 "forwprop1" } } +// { dg-final { scan-tree-dump-times " == \{ 2147483647, 2147483647, 2147483647, 2147483647 \}" 2 "forwprop1" } } +// { dg-final { scan-tree-dump-times " != \{ 2147483647, 2147483647, 2147483647, 2147483647 \}" 2 "forwprop1" } } +// { dg-final { scan-tree-dump-times " == \{ -2147483648, -2147483648, -2147483648, -2147483648 \}" 2 "forwprop1" } } +// { dg-final { scan-tree-dump-times " != \{ -2147483648, -2147483648, -2147483648, -2147483648 \}" 2 "forwprop1" } } + +typedef int V __attribute__((vector_size (16))); + +V +f1 (V a) +{ + return a > __INT_MAX__; +} + +V +f2 (V a) +{ + return a >= __INT_MAX__; +} + +V +f3 (V a) +{ + return a < __INT_MAX__; +} + +V +f4 (V a) +{ + return a <= __INT_MAX__; +} + +V +f5 (V a) +{ + return a > -__INT_MAX__ - 1; +} + +V +f6 (V a) +{ + return a >= -__INT_MAX__ - 1; +} + +V +f7 (V a) +{ + return a < -__INT_MAX__ - 1; +} + +V +f8 (V a) +{ + return a <= -__INT_MAX__ - 1; +} + +V +f9 (V a) +{ + return a > __INT_MAX__ - 1; +} + +V +f10 (V a) +{ + return a <= __INT_MAX__ - 1; +} + +V +f11 (V a) +{ + return a >= -__INT_MAX__; +} + +V +f12 (V a) +{ + return a < -__INT_MAX__; +} diff --git a/gcc/tree.c b/gcc/tree.c index 1e19a0bbdac..170ef1300ed 100644 --- a/gcc/tree.c +++ b/gcc/tree.c @@ -1906,6 +1906,18 @@ build_vector_from_val (tree vectype, tree sc) } } +/* If TYPE is not a vector type, just return SC, otherwise return + build_vector_from_val (TYPE, SC). */ + +tree +build_uniform_cst (tree type, tree sc) +{ + if (!VECTOR_TYPE_P (type)) + return sc; + + return build_vector_from_val (type, sc); +} + /* Build a vector series of type TYPE in which element I has the value BASE + I * STEP. The result is a constant if BASE and STEP are constant and a VEC_SERIES_EXPR otherwise. */ @@ -11212,6 +11224,26 @@ uniform_vector_p (const_tree vec) return NULL_TREE; } +/* If the argument is INTEGER_CST, return it. If the argument is vector + with all elements the same INTEGER_CST, return that INTEGER_CST. Otherwise + return NULL_TREE. */ + +tree +uniform_integer_cst_p (tree t) +{ + if (TREE_CODE (t) == INTEGER_CST) + return t; + + if (VECTOR_TYPE_P (TREE_TYPE (t))) + { + t = uniform_vector_p (t); + if (t && TREE_CODE (t) == INTEGER_CST) + return t; + } + + return NULL_TREE; +} + /* Build an empty statement at location LOC. */ tree diff --git a/gcc/tree.h b/gcc/tree.h index 0767ee80ad3..960526d48a8 100644 --- a/gcc/tree.h +++ b/gcc/tree.h @@ -4182,6 +4182,7 @@ extern tree build_int_cst_type (tree, poly_int64); extern tree make_vector (unsigned, unsigned CXX_MEM_STAT_INFO); extern tree build_vector_from_ctor (tree, vec *); extern tree build_vector_from_val (tree, tree); +extern tree build_uniform_cst (tree, tree); extern tree build_vec_series (tree, tree, tree); extern tree build_index_vector (tree, poly_uint64, poly_uint64); extern void recompute_constructor_flags (tree); @@ -4492,6 +4493,12 @@ extern tree vector_cst_elt (const_tree, unsigned int); extern tree uniform_vector_p (const_tree); +/* If the argument is INTEGER_CST, return it. If the argument is vector + with all elements the same INTEGER_CST, return that INTEGER_CST. Otherwise + return NULL_TREE. */ + +extern tree uniform_integer_cst_p (tree); + /* Given a CONSTRUCTOR CTOR, return the element values as a vector. */ extern vec *ctor_to_vec (tree); -- 2.30.2