diff options
| author | Richard Biener <rguenther@suse.de> | 2022-06-14 10:59:49 +0200 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2022-07-19 11:24:50 +0200 |
| commit | 1fe7321a6ce0dcb05763c8f1850a066824516342 (patch) | |
| tree | bdbd81d304633d5509c7de239abb4551d54da7af | |
| parent | 92aa9490315d969d6e7580fb6e8d006415877bd6 (diff) | |
middle-end/105965 - add missing v_c_e <{ el }> simplification
When we got the simplification of bit-field-ref to view-convert
we lost the ability to detect FMAs since we cannot look through
_1 = {_10};
_11 = VIEW_CONVERT_EXPR<float>(_1);
the following amends the (view_convert CONSTRUCTOR) pattern
to handle this case.
2022-06-14 Richard Biener <rguenther@suse.de>
PR middle-end/105965
* match.pd (view_convert CONSTRUCTOR): Handle single-element
CTOR case.
* gcc.target/i386/pr105965.c: New testcase.
(cherry picked from commit 90467f0ad649d0817f9e034596a0fb85605b55af)
| -rw-r--r-- | gcc/match.pd | 17 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/i386/pr105965.c | 12 |
2 files changed, 25 insertions, 4 deletions
diff --git a/gcc/match.pd b/gcc/match.pd index 6d691d302b3..fa59624d66b 100644 --- a/gcc/match.pd +++ b/gcc/match.pd @@ -3672,12 +3672,21 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT) && TYPE_UNSIGNED (TREE_TYPE (@1))))) (view_convert @1))) -/* Simplify a view-converted empty constructor. */ +/* Simplify a view-converted empty or single-element constructor. */ (simplify (view_convert CONSTRUCTOR@0) - (if (TREE_CODE (@0) != SSA_NAME - && CONSTRUCTOR_NELTS (@0) == 0) - { build_zero_cst (type); })) + (with + { tree ctor = (TREE_CODE (@0) == SSA_NAME + ? gimple_assign_rhs1 (SSA_NAME_DEF_STMT (@0)) : @0); } + (switch + (if (CONSTRUCTOR_NELTS (ctor) == 0) + { build_zero_cst (type); }) + (if (CONSTRUCTOR_NELTS (ctor) == 1 + && VECTOR_TYPE_P (TREE_TYPE (ctor)) + && operand_equal_p (TYPE_SIZE (type), + TYPE_SIZE (TREE_TYPE + (CONSTRUCTOR_ELT (ctor, 0)->value)))) + (view_convert { CONSTRUCTOR_ELT (ctor, 0)->value; }))))) /* Re-association barriers around constants and other re-association barriers can be removed. */ diff --git a/gcc/testsuite/gcc.target/i386/pr105965.c b/gcc/testsuite/gcc.target/i386/pr105965.c new file mode 100644 index 00000000000..5bb53790de8 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/pr105965.c @@ -0,0 +1,12 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -mfma -mfpmath=sse" } */ + +typedef float v1sf __attribute__((vector_size(4))); + +v1sf +foo43 (v1sf a, v1sf b, v1sf c) +{ + return a * b + c; +} + +/* { dg-final { scan-assembler "fmadd" } } */ |