expmed.c (emit_store_flag_1): Fix choice of zero vs.

2009-07-11  Paolo Bonzini  <bonzini@gnu.org>

	* expmed.c (emit_store_flag_1): Fix choice of zero vs. sign extension.

2009-07-11  Paolo Bonzini  <bonzini@gnu.org>

	* gcc.c-torture/execute/20090711-1.c: New test.

From-SVN: r149509

gcc/ChangeLog

+2009-07-11  Paolo Bonzini  <bonzini@gnu.org>
+
+	* expmed.c (emit_store_flag_1): Fix choice of zero vs. sign extension.
+
 2009-07-10  DJ Delorie  <dj@redhat.com>
 
 	* config/mep/mep.c (mep_can_inline_p): Correct logic, and simplify.

gcc/expmed.c

@@ -5343,7 +5343,7 @@ emit_store_flag_1 (rtx target, enum rtx_code code, rtx op0, rtx op1,
 	    target = gen_reg_rtx (target_mode);
 
 	  convert_move (target, tem,
-			0 == (STORE_FLAG_VALUE
+			0 == ((normalizep ? normalizep : STORE_FLAG_VALUE)
 			      & ((HOST_WIDE_INT) 1
 				 << (GET_MODE_BITSIZE (word_mode) -1))));
 	  return target;

gcc/testsuite/ChangeLog

+2009-07-11  Paolo Bonzini  <bonzini@gnu.org>
+
+	* gcc.c-torture/execute/20090711-1.c: New test.
+
 2009-07-11  Richard Sandiford  <rdsandiford@googlemail.com>
 
 	PR testsuite/40699

gcc/testsuite/gcc.c-torture/execute/20090711-1.c

+/* Used to be miscompiled at -O0 due to incorrect choice of sign extension
+   vs. zero extension.  __attribute__ ((noinline)) added to try to make it
+   fail at higher optimization levels too.  */
+
+extern void abort (void);
+
+long long __attribute__ ((noinline))
+div (long long val)
+{
+  return val / 32768;
+}
+
+int main (void)
+{
+  long long d1 = -990000000;
+  long long d2 = div(d1);
+  if (d2 != -30212)
+    abort ();
+  return 0;
+}
+