re PR lto/47259 (LTO and global register variable)

2011-01-12  Richard Guenther  <rguenther@suse.de>

	PR lto/47259
	* gcc.dg/lto/pr47259_0.c: New testcase.
	* gcc.dg/lto/pr47259_1.c: Likewise.

From-SVN: r168715

gcc/testsuite/ChangeLog

+2011-01-12  Richard Guenther  <rguenther@suse.de>
+
+	PR lto/47259
+	* gcc.dg/lto/pr47259_0.c: New testcase.
+	* gcc.dg/lto/pr47259_1.c: Likewise.
+
 2011-01-12  Iain Sandoe  <iains@gcc.gnu.org>
 
 	* objc-obj-c++-shared/Object1.h: Add copyright header, update

gcc/testsuite/gcc.dg/lto/pr47259_0.c

+/* { dg-lto-do link } */
+/* { dg-skip-if "" { ! { x86_64-*-* } } { "*" } { "" } } */
+/* { dg-lto-options { { -O2 -flto -w } } } */
+/* { dg-require-effective-target lp64 } */
+
+register int r asm("esi");
+
+void foo(void)
+{
+  if (r)
+    __asm__("sar\t%0" : "+r" (r));
+  __asm__("sar\t%0" : "+r" (r));
+}

gcc/testsuite/gcc.dg/lto/pr47259_1.c

+/* { dg-options "-fno-lto" } */
+
+extern void foo(void);
+
+int main(void)
+{
+  foo();
+  return 0;
+}