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From: David Schultz <das@FreeBSD.org>
Date: Mon, 6 Dec 2010 00:19:56 +0000 (UTC)
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Subject: svn commit: r216223 - head/tools/regression/lib/msun
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Author: das
Date: Mon Dec  6 00:19:56 2010
New Revision: 216223
URL: http://svn.freebsd.org/changeset/base/216223

Log:
  Work around gcc constant folding bugs.

Modified:
  head/tools/regression/lib/msun/test-lrint.c

Modified: head/tools/regression/lib/msun/test-lrint.c
==============================================================================
--- head/tools/regression/lib/msun/test-lrint.c	Mon Dec  6 00:02:49 2010	(r216222)
+++ head/tools/regression/lib/msun/test-lrint.c	Mon Dec  6 00:19:56 2010	(r216223)
@@ -41,9 +41,14 @@ __FBSDID("$FreeBSD$");
 #include <ieeefp.h>
 #endif
 
+/*
+ * XXX The volatile here is to avoid gcc's bogus constant folding and work
+ *     around the lack of support for the FENV_ACCESS pragma.
+ */
 #define	test(func, x, result, excepts)	do {				\
+	volatile double _d = x;						\
 	assert(feclearexcept(FE_ALL_EXCEPT) == 0);			\
-	assert((func)(x) == (result) || fetestexcept(FE_INVALID));	\
+	assert((func)(_d) == (result) || fetestexcept(FE_INVALID));	\
 	assert(fetestexcept(FE_ALL_EXCEPT) == (excepts));		\
 } while (0)