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| author | Prathamesh Kulkarni <prathamesh.kulkarni@linaro.org> | 2020-12-08 14:30:04 +0530 |
|---|---|---|
| committer | Prathamesh Kulkarni <prathamesh.kulkarni@linaro.org> | 2020-12-08 14:30:04 +0530 |
| commit | 3a6e3ad38a17a03ee0139b49a0946e7b9ded1eb1 (patch) | |
| tree | 7f183717821fc4422d514302c8950b6033ba2d53 /gcc | |
| parent | e844c04e35ca2fe9ee2f758a720dd37cbe81e7ef (diff) | |
| download | gcc-3a6e3ad38a17a03ee0139b49a0946e7b9ded1eb1.zip gcc-3a6e3ad38a17a03ee0139b49a0946e7b9ded1eb1.tar.gz gcc-3a6e3ad38a17a03ee0139b49a0946e7b9ded1eb1.tar.bz2 | |
gimple-isel: Fold x CMP y ? -1 : 0 to x CMP y [PR97872]
gcc/
2020-12-08 Prathamesh Kulkarni <prathamesh.kulkarni@linaro.org>
PR target/97872
* gimple-isel.cc (gimple_expand_vec_cond_expr): Try to fold
x CMP y ? -1 : 0 to x CMP y.
gcc/testsuite/
2020-12-08 Prathamesh Kulkarni <prathamesh.kulkarni@linaro.org>
PR target/97872
* gcc.target/arm/pr97872.c: New test.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/gimple-isel.cc | 14 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/arm/pr97872.c | 12 |
2 files changed, 26 insertions, 0 deletions
diff --git a/gcc/gimple-isel.cc b/gcc/gimple-isel.cc index d79c212..1ab75e7 100644 --- a/gcc/gimple-isel.cc +++ b/gcc/gimple-isel.cc @@ -184,6 +184,20 @@ gimple_expand_vec_cond_expr (gimple_stmt_iterator *gsi, tree op0_type = TREE_TYPE (op0); tree op0a_type = TREE_TYPE (op0a); + + /* Try to fold x CMP y ? -1 : 0 to x CMP y. */ + + if (integer_minus_onep (op1) + && integer_zerop (op2) + && TYPE_MODE (TREE_TYPE (lhs)) == TYPE_MODE (TREE_TYPE (op0)) + && expand_vec_cmp_expr_p (op0a_type, op0_type, tcode)) + { + tree conv_op = build1 (VIEW_CONVERT_EXPR, TREE_TYPE (lhs), op0); + gassign *new_stmt = gimple_build_assign (lhs, conv_op); + gsi_replace (gsi, new_stmt, true); + return new_stmt; + } + if (used_vec_cond_exprs >= 2 && (get_vcond_mask_icode (mode, TYPE_MODE (op0_type)) != CODE_FOR_nothing) diff --git a/gcc/testsuite/gcc.target/arm/pr97872.c b/gcc/testsuite/gcc.target/arm/pr97872.c new file mode 100644 index 0000000..eeb4dd9 --- /dev/null +++ b/gcc/testsuite/gcc.target/arm/pr97872.c @@ -0,0 +1,12 @@ +/* { dg-do compile } */ +/* { dg-require-effective-target arm_neon_ok } */ +/* { dg-options "-O3" } */ +/* { dg-add-options arm_neon } */ + +#include <arm_neon.h> + +uint8x8_t f1(int8x8_t a, int8x8_t b) { + return a < b; +} + +/* { dg-final { scan-assembler-not "vbsl" } } */ |