diff options
| author | Richard Biener <rguenther@suse.de> | 2021-11-30 08:19:24 +0100 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2021-11-30 09:16:41 +0100 |
| commit | e2521cd2d26661cfcfceaabf9bd281ef316fd3fc (patch) | |
| tree | 58bb7df30c2c5ca7adffce8dd88f78f8ea21cde3 /gcc | |
| parent | 930e7637828b6c6da7ff33ff3bd20c5c4c9164e7 (diff) | |
| download | gcc-e2521cd2d26661cfcfceaabf9bd281ef316fd3fc.zip gcc-e2521cd2d26661cfcfceaabf9bd281ef316fd3fc.tar.gz gcc-e2521cd2d26661cfcfceaabf9bd281ef316fd3fc.tar.bz2 | |
middle-end/103485 - fix conversion kind for vectors
This makes sure to use a VIEW_CONVERT_EXPR for converting
vector signedness in the -((int)x >> (prec - 1)) to (unsigned)x >> (prec - 1)
simplification.
2021-11-30 Richard Biener <rguenther@suse.de>
PR middle-end/103485
* match.pd (-((int)x >> (prec - 1)) to (unsigned)x >> (prec - 1)):
Use VIEW_CONVERT_EXPR for vectors.
* gcc.dg/pr103485.c: New testcase.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/match.pd | 4 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/pr103485.c | 10 |
2 files changed, 13 insertions, 1 deletions
diff --git a/gcc/match.pd b/gcc/match.pd index e14f97e..d467a1c 100644 --- a/gcc/match.pd +++ b/gcc/match.pd @@ -1611,7 +1611,9 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT) (with { tree stype = TREE_TYPE (@0); tree ntype = TYPE_UNSIGNED (stype) ? signed_type_for (stype) : unsigned_type_for (stype); } - (convert (rshift:ntype (convert:ntype @0) @1))))) + (if (VECTOR_TYPE_P (type)) + (view_convert (rshift (view_convert:ntype @0) @1)) + (convert (rshift (convert:ntype @0) @1)))))) /* Try to fold (type) X op CST -> (type) (X op ((type-x) CST)) when profitable. diff --git a/gcc/testsuite/gcc.dg/pr103485.c b/gcc/testsuite/gcc.dg/pr103485.c new file mode 100644 index 0000000..1afa928 --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr103485.c @@ -0,0 +1,10 @@ +/* { dg-do compile } */ + +int foo_v256u128_0; +unsigned __attribute__((__vector_size__ (sizeof(unsigned) * 8))) foo_v256u8_0; + +void +foo (void) +{ + foo_v256u8_0 -= (foo_v256u8_0 >> sizeof (foo_v256u8_0) - 1) + foo_v256u128_0; +} |