builtin-unreachable.c: New test.

2009-06-17  David Daney  <ddaney@caviumnetworks.com>

	* gcc.target/i386/builtin-unreachable.c: New test.

From-SVN: r148622

gcc/testsuite/ChangeLog

+2009-06-17  David Daney  <ddaney@caviumnetworks.com>
+
+	* gcc.target/i386/builtin-unreachable.c: New test.
+
 2009-06-17  Ian Lance Taylor  <iant@google.com>
 
 	* gcc.dg/Wcxx-compat-14.c: New testcase.

gcc/testsuite/gcc.target/i386/builtin-unreachable.c

+/* This should return 1 without setting up a stack frame or
+   jumping.  */
+/* { dg-do compile } */
+/* { dg-require-effective-target ilp32 } */
+/* { dg-options "-O2 -fomit-frame-pointer" } */
+int h (char *p)
+{
+  if (*p)
+    __builtin_unreachable ();
+  return p ? 1 : 0;
+}
+/* { dg-final { scan-assembler-not "%e\[bs\]p" } } */
+/* { dg-final { scan-assembler-not "\[\\t \]+j" } } */