From: H.J. Lu <hongjiu.lu@intel.com>
Date: Fri, 12 Oct 2018 12:34:36 +0000 (+0000)
Subject: i386: Don't pass -msse2avx to assembler for -mavx
X-Git-Tag: releases/gcc-6.5.0~38
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e0b0bc007cb21d0541dee0f80544884d5d74d06e;p=thirdparty%2Fgcc.git

i386: Don't pass -msse2avx to assembler for -mavx

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.

	Backport from mainline
	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.

From-SVN: r265090
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index dfe7efc61fb2..acfb3175e4d2 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,13 @@
+2018-10-12  H.J. Lu  <hongjiu.lu@intel.com>
+
+	Backport from mainline
+	2018-10-05  H.J. Lu  <hongjiu.lu@intel.com>
+
+	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.
+
 2018-09-19  John David Anglin  <danglin@gcc.gnu.org>
 
 	* config/pa/pa.md (atomic_storeqi): Restore deleted expander.
diff --git a/gcc/config/i386/gnu-user.h b/gcc/config/i386/gnu-user.h
index fee33a3efdcb..3842f8928d53 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 7a02a7eb4d79..5aa2876739fb 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 "} \