Record function attribute "stackrealign" instead of using backend option
-force-align-stack.

Also, make changes to the driver so that -mno-stack-realign is no longer
an option exposed to the end-user that disallows stack realignment in
the backend.

Differential Revision: http://reviews.llvm.org/D11815

llvm-svn: 247451
diff --git a/clang/test/Driver/stackrealign.c b/clang/test/Driver/stackrealign.c
index c5221d6..70de40f 100644
--- a/clang/test/Driver/stackrealign.c
+++ b/clang/test/Driver/stackrealign.c
@@ -1,12 +1,6 @@
-// RUN: %clang -### %s 2>&1 | FileCheck %s -check-prefix=NORMAL
-// NORMAL-NOT: -force-align-stack
-// NORMAL: -mstackrealign
+// RUN: %clang -### %s 2>&1 | FileCheck %s -check-prefix=NO-REALIGN
+// RUN: %clang -### -mno-stackrealign -mstackrealign %s 2>&1 | FileCheck %s -check-prefix=REALIGN
+// RUN: %clang -### -mstackrealign -mno-stackrealign %s 2>&1 | FileCheck %s -check-prefix=NO-REALIGN
 
-// RUN: %clang -### -mstackrealign %s 2>&1 | FileCheck %s -check-prefix=MREALIGN
-// MREALIGN: -force-align-stack
-// MREALIGN: -mstackrealign
-
-// RUN: %clang -### -mno-stackrealign %s 2>&1 | \
-// RUN: FileCheck %s -check-prefix=MNOREALIGN
-// MNOREALIGN-NOT: -force-align-stack
-// MNOREALIGN-NOT: -mstackrealign
+// REALIGN: -mstackrealign
+// NO-REALIGN-NOT: -mstackrealign