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| author | Andre Simoes Dias Vieira <andre.simoesdiasvieira@arm.com> | 2021-10-20 13:12:09 +0100 |
|---|---|---|
| committer | Andre Vieira <andre.simoesdiasvieira@arm.com> | 2021-10-20 13:14:39 +0100 |
| commit | 914045dff10fbd27de27b90a0ac78a0058b2c86e (patch) | |
| tree | 5d2d2b018d25bd149f22f9334b282a286684e465 /gcc | |
| parent | ac5e46563817f4f1bd786be1d21b85d18e61bc0c (diff) | |
| download | gcc-914045dff10fbd27de27b90a0ac78a0058b2c86e.zip gcc-914045dff10fbd27de27b90a0ac78a0058b2c86e.tar.gz gcc-914045dff10fbd27de27b90a0ac78a0058b2c86e.tar.bz2 | |
[Patch][GCC][middle-end] - Generate FRINTZ for (double)(int) under -ffast-math on aarch64
20-10-2021 Andre Vieira <andre.simoesdiasvieira@arm.com>
Jirui Wu <jirui.wu@arm.com>
gcc/ChangeLog:
* match.pd: Generate IFN_TRUNC.
gcc/testsuite/ChangeLog:
* gcc.target/aarch64/merge_trunc1.c: New test.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/match.pd | 13 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/aarch64/merge_trunc1.c | 41 |
2 files changed, 54 insertions, 0 deletions
diff --git a/gcc/match.pd b/gcc/match.pd index 3ff15bc..5bed2e1 100644 --- a/gcc/match.pd +++ b/gcc/match.pd @@ -3606,6 +3606,19 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT) >= inside_prec - !inside_unsignedp) (convert @0))))))) +/* (float_type)(integer_type) x -> trunc (x) if the type of x matches + float_type. Only do the transformation if we do not need to preserve + trapping behaviour, so require !flag_trapping_math. */ +#if GIMPLE +(simplify + (float (fix_trunc @0)) + (if (!flag_trapping_math + && types_match (type, TREE_TYPE (@0)) + && direct_internal_fn_supported_p (IFN_TRUNC, type, + OPTIMIZE_FOR_BOTH)) + (IFN_TRUNC @0))) +#endif + /* If we have a narrowing conversion to an integral type that is fed by a BIT_AND_EXPR, we might be able to remove the BIT_AND_EXPR if it merely masks off bits outside the final type (and nothing else). */ diff --git a/gcc/testsuite/gcc.target/aarch64/merge_trunc1.c b/gcc/testsuite/gcc.target/aarch64/merge_trunc1.c new file mode 100644 index 0000000..0721706 --- /dev/null +++ b/gcc/testsuite/gcc.target/aarch64/merge_trunc1.c @@ -0,0 +1,41 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -ffast-math" } */ + +float +f1 (float x) +{ + int y = x; + + return (float) y; +} + +double +f2 (double x) +{ + long y = x; + + return (double) y; +} + +float +f3 (double x) +{ + int y = x; + + return (float) y; +} + +double +f4 (float x) +{ + int y = x; + + return (double) y; +} + +/* { dg-final { scan-assembler "frintz\\ts\[0-9\]+, s\[0-9\]+" } } */ +/* { dg-final { scan-assembler "frintz\\td\[0-9\]+, d\[0-9\]+" } } */ +/* { dg-final { scan-assembler "fcvtzs\\tw\[0-9\]+, d\[0-9\]+" } } */ +/* { dg-final { scan-assembler "scvtf\\ts\[0-9\]+, w\[0-9\]+" } } */ +/* { dg-final { scan-assembler "fcvtzs\\tw\[0-9\]+, s\[0-9\]+" } } */ +/* { dg-final { scan-assembler "scvtf\\td\[0-9\]+, w\[0-9\]+" } } */ |