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| author | liuhongt <hongtao.liu@intel.com> | 2023-07-27 15:14:39 +0800 |
|---|---|---|
| committer | liuhongt <hongtao.liu@intel.com> | 2023-07-28 10:06:44 +0800 |
| commit | 54e54f77c1012ab53126314181c51eaee146ad5d (patch) | |
| tree | b297b4da3e7a877338fdcbb90e58e6956a3e8f93 | |
| parent | 0c7b0745e61225d649cf43181873408d081caa39 (diff) | |
| download | gcc-54e54f77c1012ab53126314181c51eaee146ad5d.zip gcc-54e54f77c1012ab53126314181c51eaee146ad5d.tar.gz gcc-54e54f77c1012ab53126314181c51eaee146ad5d.tar.bz2 | |
Add UNSPEC_MASKOP to vpbroadcastm pattern.
Prevent rtl optimization of vec_duplicate + zero_extend to
vpbroadcastm since there could be an extra kmov after RA.
gcc/ChangeLog:
PR target/110788
* config/i386/sse.md (avx512cd_maskb_vec_dup<mode>): Add
UNSPEC_MASKOP.
(avx512cd_maskw_vec_dup<mode>): Ditto.
gcc/testsuite/ChangeLog:
* gcc.target/i386/pr110788.c: New test.
| -rw-r--r-- | gcc/config/i386/sse.md | 8 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/i386/pr110788.c | 11 |
2 files changed, 17 insertions, 2 deletions
diff --git a/gcc/config/i386/sse.md b/gcc/config/i386/sse.md index 35fd66e..51961bb 100644 --- a/gcc/config/i386/sse.md +++ b/gcc/config/i386/sse.md @@ -26778,11 +26778,14 @@ (set_attr "prefix" "evex") (set_attr "mode" "<sseinsnmode>")]) +;; Use unspec to prevent rtl optimizer to optimize zero_extend + vec_duplicate +;; to pbroadcastm, there could be an extra kmov after RA. (define_insn "avx512cd_maskb_vec_dup<mode>" [(set (match_operand:VI8_AVX512VL 0 "register_operand" "=v") (vec_duplicate:VI8_AVX512VL (zero_extend:DI - (match_operand:QI 1 "register_operand" "k"))))] + (match_operand:QI 1 "register_operand" "k")))) + (unspec [(const_int 0)] UNSPEC_MASKOP)] "TARGET_AVX512CD" "vpbroadcastmb2q\t{%1, %0|%0, %1}" [(set_attr "type" "mskmov") @@ -26793,7 +26796,8 @@ [(set (match_operand:VI4_AVX512VL 0 "register_operand" "=v") (vec_duplicate:VI4_AVX512VL (zero_extend:SI - (match_operand:HI 1 "register_operand" "k"))))] + (match_operand:HI 1 "register_operand" "k")))) + (unspec [(const_int 0)] UNSPEC_MASKOP)] "TARGET_AVX512CD" "vpbroadcastmw2d\t{%1, %0|%0, %1}" [(set_attr "type" "mskmov") diff --git a/gcc/testsuite/gcc.target/i386/pr110788.c b/gcc/testsuite/gcc.target/i386/pr110788.c new file mode 100644 index 0000000..4cf1676 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/pr110788.c @@ -0,0 +1,11 @@ +/* { dg-do compile } */ +/* { dg-options "-O3 -march=cascadelake --param vect-partial-vector-usage=2" } */ +/* { dg-final { scan-assembler-not "vpbroadcastm" } } */ + +double a[1024], b[1024]; + +void foo (int n) +{ + for (int i = 0; i < n; ++i) + a[i] = b[i] * 3.; +} |