Only assume 4-byte stack alignment on 32-bit Solaris/x86 (PR target/62281)

	PR target/62281
	* config/i386/sol2.h (STACK_REALIGN_DEFAULT): Define.

From-SVN: r234022

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 2b5549808ee37b380826d8afab524243e3c16841..a797dfa0fd43a573ffd29685bb1bed0f932581ba 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2016-03-07  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
+       PR target/62281
+       * config/i386/sol2.h (STACK_REALIGN_DEFAULT): Define.
+
 2016-03-05  Venkataramanan Kumar  <Venkataramanan.kumar@amd.com>
 
        * config/i386/i386.c (znver1_cost): Fix Multiply cost.

diff --git a/gcc/config/i386/sol2.h b/gcc/config/i386/sol2.h
index 51d1c55de0d2b70b5099fb1735c48d73a7c5405e..e56e554a7403c73fc90509461e2dfebc38cb7255 100644 (file)
--- a/gcc/config/i386/sol2.h
+++ b/gcc/config/i386/sol2.h
@@ -21,6 +21,11 @@ along with GCC; see the file COPYING3.  If not see
 #define SUBTARGET_OPTIMIZATION_OPTIONS                         \
   { OPT_LEVELS_1_PLUS, OPT_momit_leaf_frame_pointer, NULL, 1 }
 
+/* 32-bit Solaris/x86 only guarantees 4-byte stack alignment as required by
+   the i386 psABI, so realign it as necessary for SSE instructions.  */
+#undef STACK_REALIGN_DEFAULT
+#define STACK_REALIGN_DEFAULT (TARGET_64BIT ? 0 : 1)
+
 /* Old versions of the Solaris assembler can not handle the difference of
    labels in different sections, so force DW_EH_PE_datarel if so.  */
 #ifndef HAVE_AS_IX86_DIFF_SECT_DELTA