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| author | H.J. Lu <hjl.tools@gmail.com> | 2021-08-03 06:17:22 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2021-08-04 12:59:38 -0700 |
| commit | 5738a64f8b3cf132b88b39af84b9f5f5a9a1554c (patch) | |
| tree | 3587f41db394a98e89ffefa94f794095f3fe630e /gcc | |
| parent | 09dba016db937e61be21ef1e9581065a9ed2847d (diff) | |
| download | gcc-5738a64f8b3cf132b88b39af84b9f5f5a9a1554c.zip gcc-5738a64f8b3cf132b88b39af84b9f5f5a9a1554c.tar.gz gcc-5738a64f8b3cf132b88b39af84b9f5f5a9a1554c.tar.bz2 | |
x86: Update STORE_MAX_PIECES
Update STORE_MAX_PIECES to allow 16/32/64 bytes only if inter-unit move
is enabled since vec_duplicate enabled by inter-unit move is used to
implement store_by_pieces of 16/32/64 bytes.
gcc/
PR target/101742
* config/i386/i386.h (STORE_MAX_PIECES): Allow 16/32/64 bytes
only if TARGET_INTER_UNIT_MOVES_TO_VEC is true.
gcc/testsuite/
PR target/101742
* gcc.target/i386/pr101742a.c: New test.
* gcc.target/i386/pr101742b.c: Likewise.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/i386/i386.h | 26 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/i386/pr101742a.c | 16 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/i386/pr101742b.c | 4 |
3 files changed, 35 insertions, 11 deletions
diff --git a/gcc/config/i386/i386.h b/gcc/config/i386/i386.h index bed9cd9..21fe51b 100644 --- a/gcc/config/i386/i386.h +++ b/gcc/config/i386/i386.h @@ -1780,18 +1780,22 @@ typedef struct ix86_args { && TARGET_SSE_UNALIGNED_STORE_OPTIMAL) \ ? 16 : UNITS_PER_WORD))) -/* STORE_MAX_PIECES is the number of bytes at a time that we can - store efficiently. */ +/* STORE_MAX_PIECES is the number of bytes at a time that we can store + efficiently. Allow 16/32/64 bytes only if inter-unit move is enabled + since vec_duplicate enabled by inter-unit move is used to implement + store_by_pieces of 16/32/64 bytes. */ #define STORE_MAX_PIECES \ - ((TARGET_AVX512F && !TARGET_PREFER_AVX256) \ - ? 64 \ - : ((TARGET_AVX \ - && !TARGET_PREFER_AVX128 \ - && !TARGET_AVX256_SPLIT_UNALIGNED_STORE) \ - ? 32 \ - : ((TARGET_SSE2 \ - && TARGET_SSE_UNALIGNED_STORE_OPTIMAL) \ - ? 16 : UNITS_PER_WORD))) + (TARGET_INTER_UNIT_MOVES_TO_VEC \ + ? ((TARGET_AVX512F && !TARGET_PREFER_AVX256) \ + ? 64 \ + : ((TARGET_AVX \ + && !TARGET_PREFER_AVX128 \ + && !TARGET_AVX256_SPLIT_UNALIGNED_STORE) \ + ? 32 \ + : ((TARGET_SSE2 \ + && TARGET_SSE_UNALIGNED_STORE_OPTIMAL) \ + ? 16 : UNITS_PER_WORD))) \ + : UNITS_PER_WORD) /* If a memory-to-memory move would take MOVE_RATIO or more simple move-instruction pairs, we will do a cpymem or libcall instead. diff --git a/gcc/testsuite/gcc.target/i386/pr101742a.c b/gcc/testsuite/gcc.target/i386/pr101742a.c new file mode 100644 index 0000000..67ea405 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/pr101742a.c @@ -0,0 +1,16 @@ +/* { dg-do compile } */ +/* { dg-additional-options "-O3 -mtune=nano-x2" } */ + +int n2; + +__attribute__ ((simd)) char +w7 (void) +{ + short int xb = n2; + int qp; + + for (qp = 0; qp < 2; ++qp) + xb = xb < 1; + + return xb; +} diff --git a/gcc/testsuite/gcc.target/i386/pr101742b.c b/gcc/testsuite/gcc.target/i386/pr101742b.c new file mode 100644 index 0000000..ba19064 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/pr101742b.c @@ -0,0 +1,4 @@ +/* { dg-do compile } */ +/* { dg-additional-options "-O3 -mtune=nano-x2 -mtune-ctrl=sse_unaligned_store_optimal" } */ + +#include "pr101742a.c" |