backport: re PR target/66703 ([4.9/5/6] gcc.target/i386/readeflags-1.c aborts on...

	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 cbb60c39071477e8ba997d9f212b7bf5dba0bace..2ff28ecfd72fe3c6cd539a3a0cd7af2a609f60df 100644 (file)
--- 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 (file)
index 0000000..0fb0582
--- /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 6b2fa7e8d146a296aac989810b0e0f932de93684..8b00d7d5d1103bafec57550e9c247a86e1f2c3e5 100644 (file)
--- 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 ();
 }