re PR target/30961 (redundant reg/mem stores/moves)

gcc/

2007-11-06  Ulrich Weigand  <Ulrich.Weigand@de.ibm.com>

	PR target/30961
	* reload1.c (find_reloads): Also check in_reg when handling a
	simple move with an input reload and a destination of a hard
	register.

gcc/testsuite/

2007-11-06  H.J. Lu  <hongjiu.lu@intel.com>

	PR target/30961
	* gcc.target/i386/pr30961-1.c: New.

From-SVN: r129943

gcc/ChangeLog

+2007-11-06  Ulrich Weigand  <Ulrich.Weigand@de.ibm.com>
+
+	PR target/30961
+	* reload1.c (find_reloads): Also check in_reg when handling a
+	simple move with an input reload and a destination of a hard
+	register.
+
 2007-11-06  Maxim Kuvyrkov  <maxim@codesourcery.com>
 
 	* config/m68k/m68k.c (sched-int.h, insn-codes.h): New includes.

gcc/reload.c

@@ -4462,7 +4462,8 @@ find_reloads (rtx insn, int replace, int ind_levels, int live_known,
     if (rld[i].when_needed == RELOAD_FOR_INPUT
 	&& GET_CODE (PATTERN (insn)) == SET
 	&& REG_P (SET_DEST (PATTERN (insn)))
-	&& SET_SRC (PATTERN (insn)) == rld[i].in
+	&& (SET_SRC (PATTERN (insn)) == rld[i].in
+	    || SET_SRC (PATTERN (insn)) == rld[i].in_reg)
 	&& !elimination_target_reg_p (SET_DEST (PATTERN (insn))))
       {
 	rtx dest = SET_DEST (PATTERN (insn));

gcc/testsuite/ChangeLog

+2007-11-06  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR target/30961
+	* gcc.target/i386/pr30961-1.c: New.
+
 2007-11-06  Tom Tromey  <tromey@redhat.com>
 
 	PR c++/32368:

gcc/testsuite/gcc.target/i386/pr30961-1.c

+/* { dg-do compile } */
+/* { dg-require-effective-target lp64 } */
+/* { dg-options "-O2" } */
+
+double
+convert (long long in)
+{
+  double f;
+  __builtin_memcpy( &f, &in, sizeof( in ) );
+  return f;
+}
+
+/* { dg-final { scan-assembler-not "movapd" } } */