2017-02-10  Jakub Jelinek  <jakub@redhat.com>

	PR sanitizer/79341
	* c-c++-common/ubsan/float-cast-overflow-8.c (TEST): Make min and max
	variables volatile.

--- gcc/testsuite/c-c++-common/ubsan/float-cast-overflow-8.c.jj	2015-10-29 09:14:30.000000000 +0100
+++ gcc/testsuite/c-c++-common/ubsan/float-cast-overflow-8.c	2017-02-10 18:09:47.767251774 +0100
@@ -8,7 +8,7 @@
 #define TEST(type1, type2) \
   if (type1##_MIN)						\
     {								\
-      type2 min = type1##_MIN;					\
+      volatile type2 min = type1##_MIN;				\
       type2 add = -1.0;						\
       while (1)							\
 	{							\
@@ -28,7 +28,7 @@
       volatile type1 tem3 = cvt_##type1##_##type2 (-1.0f);	\
     }								\
   {								\
-    type2 max = type1##_MAX;					\
+    volatile type2 max = type1##_MAX;				\
     type2 add = 1.0;						\
     while (1)							\
       {								\