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| author | liuhongt <hongtao.liu@intel.com> | 2023-06-05 12:38:41 +0800 |
|---|---|---|
| committer | liuhongt <hongtao.liu@intel.com> | 2023-06-09 09:46:42 +0800 |
| commit | 887f903ab05ddcac498247384734efbc6cf45147 (patch) | |
| tree | 36b4b0b253d26d4ca3e6e2f3492026963de054c7 /gcc | |
| parent | 7a6e2986aa6f2e30ccae2b826982026232a33fa2 (diff) | |
| download | gcc-887f903ab05ddcac498247384734efbc6cf45147.zip gcc-887f903ab05ddcac498247384734efbc6cf45147.tar.gz gcc-887f903ab05ddcac498247384734efbc6cf45147.tar.bz2 | |
Explicitly view_convert_expr mask to signed type when folding pblendvb builtins.
Since mask < 0 will be always false for vector char when
-funsigned-char, but vpblendvb needs to check the most significant
bit. The patch explicitly VCE to vector signed char.
gcc/ChangeLog:
PR target/110108
* config/i386/i386.cc (ix86_gimple_fold_builtin): Explicitly
view_convert_expr mask to signed type when folding pblendvb
builtins.
gcc/testsuite/ChangeLog:
* gcc.target/i386/pr110108-2.c: New test.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/i386/i386.cc | 4 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/i386/pr110108-2.c | 14 |
2 files changed, 17 insertions, 1 deletions
diff --git a/gcc/config/i386/i386.cc b/gcc/config/i386/i386.cc index 9a9ff3b..63e8e5e 100644 --- a/gcc/config/i386/i386.cc +++ b/gcc/config/i386/i386.cc @@ -18396,8 +18396,10 @@ ix86_gimple_fold_builtin (gimple_stmt_iterator *gsi) tree itype = GET_MODE_INNER (TYPE_MODE (type)) == E_SFmode ? intSI_type_node : intDI_type_node; type = get_same_sized_vectype (itype, type); - arg2 = gimple_build (&stmts, VIEW_CONVERT_EXPR, type, arg2); } + else + type = signed_type_for (type); + arg2 = gimple_build (&stmts, VIEW_CONVERT_EXPR, type, arg2); tree zero_vec = build_zero_cst (type); tree cmp_type = truth_type_for (type); tree cmp = gimple_build (&stmts, LT_EXPR, cmp_type, arg2, zero_vec); diff --git a/gcc/testsuite/gcc.target/i386/pr110108-2.c b/gcc/testsuite/gcc.target/i386/pr110108-2.c new file mode 100644 index 0000000..2d1d2fd --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/pr110108-2.c @@ -0,0 +1,14 @@ +/* { dg-do compile } */ +/* { dg-options "-mavx2 -O2 -funsigned-char" } */ +/* { dg-final { scan-assembler-times "vpblendvb" 2 } } */ + +#include <immintrin.h> +__m128i do_stuff_128(__m128i X0, __m128i X1, __m128i X2) { + __m128i Result = _mm_blendv_epi8(X0, X1, X2); + return Result; +} + +__m256i do_stuff_256(__m256i X0, __m256i X1, __m256i X2) { + __m256i Result = _mm256_blendv_epi8(X0, X1, X2); + return Result; +} |