From: Uros Bizjak <ubizjak@gmail.com>
Date: Fri, 17 Jul 2015 18:45:50 +0000 (+0200)
Subject: backport: re PR target/66703 ([4.9/5/6] gcc.target/i386/readeflags-1.c aborts on... 
X-Git-Tag: releases/gcc-4.9.4~696
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a7972e3b48029b3445e874d52a18a6d04aaca2ba;p=thirdparty%2Fgcc.git

backport: re PR target/66703 ([4.9/5/6] gcc.target/i386/readeflags-1.c aborts on -march=i586 or on -miamcu)

	Backport from mainline:
	2015-07-10  Uros Bizjak  <ubizjak@gmail.com>

	PR target/66703
	* gcc.target/i386/readeflags-1.c (readeflags_test): Declare with
	__attribute__((noinline, noclone)).  Change "x" to "volatile char"
	type to prevent possible flag-clobbering zero-extensions.
	* gcc.target/i386/pr66703.c: New test.

From-SVN: r225962
---

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index cbb60c390714..2ff28ecfd72f 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,14 @@
+2015-06-17  Uros Bizjak  <ubizjak@gmail.com>
+
+	Backport from mainline:
+	2015-07-10  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR target/66703
+	* gcc.target/i386/readeflags-1.c (readeflags_test): Declare with
+	__attribute__((noinline, noclone)).  Change "x" to "volatile char"
+	type to prevent possible flag-clobbering zero-extensions.
+	* gcc.target/i386/pr66703.c: New test.
+
 2015-06-17  Uros Bizjak  <ubizjak@gmail.com>
 
 	Backport from mainline:
diff --git a/gcc/testsuite/gcc.target/i386/pr66703.c b/gcc/testsuite/gcc.target/i386/pr66703.c
new file mode 100644
index 000000000000..0fb05829deb6
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr66703.c
@@ -0,0 +1,4 @@
+/* { dg-do run { target { ia32 } } } */
+/* { dg-options "-O0 -mtune=pentium" } */
+
+#include "readeflags-1.c"
diff --git a/gcc/testsuite/gcc.target/i386/readeflags-1.c b/gcc/testsuite/gcc.target/i386/readeflags-1.c
index 6b2fa7e8d146..8b00d7d5d110 100644
--- a/gcc/testsuite/gcc.target/i386/readeflags-1.c
+++ b/gcc/testsuite/gcc.target/i386/readeflags-1.c
@@ -9,10 +9,11 @@
 #define EFLAGS_TYPE unsigned int
 #endif
 
-static EFLAGS_TYPE
+__attribute__((noinline, noclone))
+EFLAGS_TYPE
 readeflags_test (unsigned int a, unsigned int b)
 {
-  unsigned x = (a == b);
+  volatile char x = (a == b);
   return __readeflags ();
 }