diff options
| -rw-r--r-- | gcc/config/i386/i386-features.c | 8 | ||||
| -rw-r--r-- | gcc/config/i386/i386-options.c | 4 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/i386/avx-vzeroupper-29.c | 14 |
3 files changed, 19 insertions, 7 deletions
diff --git a/gcc/config/i386/i386-features.c b/gcc/config/i386/i386-features.c index 329f4c36a9a..a5e0c21ec1a 100644 --- a/gcc/config/i386/i386-features.c +++ b/gcc/config/i386/i386-features.c @@ -1825,9 +1825,7 @@ ix86_add_reg_usage_to_vzerouppers (void) static unsigned int rest_of_handle_insert_vzeroupper (void) { - if (TARGET_VZEROUPPER - && flag_expensive_optimizations - && !optimize_size) + if (TARGET_VZEROUPPER) { /* vzeroupper instructions are inserted immediately after reload to account for possible spills from 256bit or 512bit registers. The pass @@ -1871,9 +1869,7 @@ public: virtual bool gate (function *) { return TARGET_AVX - && ((TARGET_VZEROUPPER - && flag_expensive_optimizations - && !optimize_size) + && (TARGET_VZEROUPPER || cfun->machine->has_explicit_vzeroupper); } diff --git a/gcc/config/i386/i386-options.c b/gcc/config/i386/i386-options.c index 7bb644b67b4..3510ad5f5d7 100644 --- a/gcc/config/i386/i386-options.c +++ b/gcc/config/i386/i386-options.c @@ -2715,7 +2715,9 @@ ix86_option_override_internal (bool main_args_p, sorry ("%<-mcall-ms2sysv-xlogues%> isn%'t currently supported with SEH"); if (!(opts_set->x_target_flags & MASK_VZEROUPPER) - && TARGET_EMIT_VZEROUPPER) + && TARGET_EMIT_VZEROUPPER + && flag_expensive_optimizations + && !optimize_size) opts->x_target_flags |= MASK_VZEROUPPER; if (!(opts_set->x_target_flags & MASK_STV)) opts->x_target_flags |= MASK_STV; diff --git a/gcc/testsuite/gcc.target/i386/avx-vzeroupper-29.c b/gcc/testsuite/gcc.target/i386/avx-vzeroupper-29.c new file mode 100644 index 00000000000..4af637757f7 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/avx-vzeroupper-29.c @@ -0,0 +1,14 @@ +/* { dg-do compile } */ +/* { dg-options "-O0 -mavx -mtune=generic -mvzeroupper -dp" } */ + +#include <immintrin.h> + +extern __m256 x, y; + +void +foo () +{ + x = y; +} + +/* { dg-final { scan-assembler-times "avx_vzeroupper" 1 } } */ |