With
gcc -O2 -fPIC -flto -g -c -o a.o a.c
gcc -O2 -fPIC -flto -g -mavx -c -o b.o b.c
gcc -shared -O2 -fPIC -flto -g -o lib1.so a.o b.o
LTO correctly generates AVX for b.o and SSE for a.o. But the GCC driver
passes -msse2avx to assembler, which encodes SSE instructions as AVX
instructions. We shouldn't pass -msse2avx to assembler for -mavx.
Tested on x86-64. OK for trunk?
Thanks.
H.J.
---
PR target/87522
* config/i386/gnu-user.h (ASM_SPEC): Don't pass -msse2avx to
assembler for -mavx.
* config/i386/gnu-user64.h (ASM_SPEC): Likewise.
---
gcc/config/i386/gnu-user.h | 2 +-
gcc/config/i386/gnu-user64.h | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/gcc/config/i386/gnu-user.h b/gcc/config/i386/gnu-user.h
index a922c9b93fa..baed87aa54f 100644
--- a/gcc/config/i386/gnu-user.h
+++ b/gcc/config/i386/gnu-user.h
@@ -67,7 +67,7 @@ along with GCC; see the file COPYING3. If not see
#undef ASM_SPEC
#define ASM_SPEC \
- "--32 %{!mno-sse2avx:%{mavx:-msse2avx}} %{msse2avx:%{!mavx:-msse2avx}}"
+ "--32 %{msse2avx:%{!mavx:-msse2avx}}"
#undef SUBTARGET_EXTRA_SPECS
#define SUBTARGET_EXTRA_SPECS \
diff --git a/gcc/config/i386/gnu-user64.h b/gcc/config/i386/gnu-user64.h
index f7a68fdecf0..09141ce3508 100644
--- a/gcc/config/i386/gnu-user64.h
+++ b/gcc/config/i386/gnu-user64.h
@@ -50,7 +50,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If
not, see
#define ASM_SPEC "%{" SPEC_32 ":--32} \
%{" SPEC_64 ":--64} \
%{" SPEC_X32 ":--x32} \
- %{!mno-sse2avx:%{mavx:-msse2avx}} %{msse2avx:%{!mavx:-msse2avx}}"
+ %{msse2avx:%{!mavx:-msse2avx}}"
#define GNU_USER_TARGET_LINK_SPEC \
"%{" SPEC_64 ":-m " GNU_USER_LINK_EMULATION64 "} \
--
2.17.1
