re PR rtl-optimization/10474 (shrink wrapping for functions)

	PR rtl-optimization/10474
	* ira.c (interesting_dest_for_shprep_1): New function.
	(interesting_dest_for_shprep): Use interesting_dest_for_shprep_1,
	also check parallels.

testsuite/
	* gcc.dg/pr10474.c: Also test ppc64.
	* gcc.dg/ira-shrinkwrap-prep-1.c: Also tes ppc64, changed all ints
        to longs.
	* gcc.dg/ira-shrinkwrap-prep-2.c: Likewise.

From-SVN: r205281

gcc/ChangeLog

+2013-11-22  Martin Jambor  <mjambor@suse.cz>
+
+	PR rtl-optimization/10474
+	* ira.c (interesting_dest_for_shprep_1): New function.
+	(interesting_dest_for_shprep): Use interesting_dest_for_shprep_1,
+	also check parallels.
+
 2013-11-22  Jeff Law  <law@redhat.com>
 
 	* tree-ssa-threadedge.c (record_temporary_equivalence): Handle

gcc/ira.c

@@ -4847,17 +4847,13 @@ find_moveable_pseudos (void)
   free_dominance_info (CDI_DOMINATORS);
 }
 
-
-/* If insn is interesting for parameter range-splitting shring-wrapping
-   preparation, i.e. it is a single set from a hard register to a pseudo, which
-   is live at CALL_DOM, return the destination.  Otherwise return NULL.  */
+/* If SET pattern SET is an assignment from a hard register to a pseudo which
+   is live at CALL_DOM (if non-NULL, otherwise this check is omitted), return
+   the destination.  Otherwise return NULL.  */
 
 static rtx
-interesting_dest_for_shprep (rtx insn, basic_block call_dom)
+interesting_dest_for_shprep_1 (rtx set, basic_block call_dom)
 {
-  rtx set = single_set (insn);
-  if (!set)
-    return NULL;
   rtx src = SET_SRC (set);
   rtx dest = SET_DEST (set);
   if (!REG_P (src) || !HARD_REGISTER_P (src)
@@ -4867,6 +4863,41 @@ interesting_dest_for_shprep (rtx insn, basic_block call_dom)
   return dest;
 }
 
+/* If insn is interesting for parameter range-splitting shring-wrapping
+   preparation, i.e. it is a single set from a hard register to a pseudo, which
+   is live at CALL_DOM (if non-NULL, otherwise this check is omitted), or a
+   parallel statement with only one such statement, return the destination.
+   Otherwise return NULL.  */
+
+static rtx
+interesting_dest_for_shprep (rtx insn, basic_block call_dom)
+{
+  if (!INSN_P (insn))
+    return NULL;
+  rtx pat = PATTERN (insn);
+  if (GET_CODE (pat) == SET)
+    return interesting_dest_for_shprep_1 (pat, call_dom);
+
+  if (GET_CODE (pat) != PARALLEL)
+    return NULL;
+  rtx ret = NULL;
+  for (int i = 0; i < XVECLEN (pat, 0); i++)
+    {
+      rtx sub = XVECEXP (pat, 0, i);
+      if (GET_CODE (sub) == USE || GET_CODE (sub) == CLOBBER)
+	continue;
+      if (GET_CODE (sub) != SET
+	  || side_effects_p (sub))
+	return NULL;
+      rtx dest = interesting_dest_for_shprep_1 (sub, call_dom);
+      if (dest && ret)
+	return NULL;
+      if (dest)
+	ret = dest;
+    }
+  return ret;
+}
+
 /* Split live ranges of pseudos that are loaded from hard registers in the
    first BB in a BB that dominates all non-sibling call if such a BB can be
    found and is not in a loop.  Return true if the function has made any

gcc/testsuite/ChangeLog

+2013-11-22  Martin Jambor  <mjambor@suse.cz>
+
+	* gcc.dg/pr10474.c: Also test ppc64.
+	* gcc.dg/ira-shrinkwrap-prep-1.c: Also tes ppc64, changed all ints
+        to longs.
+	* gcc.dg/ira-shrinkwrap-prep-2.c: Likewise.
+
 2013-11-22  Michael Meissner  <meissner@linux.vnet.ibm.com>
 
 	PR target/59054

gcc/testsuite/gcc.dg/ira-shrinkwrap-prep-1.c

-/* { dg-do compile { target { x86_64-*-* && lp64 } } } */
+/* { dg-do compile { target { { x86_64-*-* && lp64 } || { powerpc*-*-* && lp64 } } } } */
 /* { dg-options "-O3 -fdump-rtl-ira -fdump-rtl-pro_and_epilogue"  } */
 
-int __attribute__((noinline, noclone))
-foo (int a)
+long __attribute__((noinline, noclone))
+foo (long a)
 {
   return a + 5;
 }
 
-static int g;
+static long g;
 
-int __attribute__((noinline, noclone))
-bar (int a)
+long __attribute__((noinline, noclone))
+bar (long a)
 {
-  int r;
+  long r;
 
   if (a)
     {

gcc/testsuite/gcc.dg/ira-shrinkwrap-prep-2.c

-/* { dg-do compile { target { x86_64-*-* && lp64 } } } */
+/* { dg-do compile { target { { x86_64-*-* && lp64 } || { powerpc*-*-* && lp64 } } } } */
 /* { dg-options "-O3 -fdump-rtl-ira -fdump-rtl-pro_and_epilogue"  } */
 
-int __attribute__((noinline, noclone))
-foo (int a)
+long __attribute__((noinline, noclone))
+foo (long a)
 {
   return a + 5;
 }
 
-static int g;
+static long g;
 
-int __attribute__((noinline, noclone))
-bar (int a)
+long __attribute__((noinline, noclone))
+bar (long a)
 {
-  int r;
+  long r;
 
   if (a)
     {

gcc/testsuite/gcc.dg/pr10474.c

-/* { dg-do compile { target { x86_64-*-* && lp64 } } } */
+/* { dg-do compile { target { { x86_64-*-* && lp64 } || { powerpc*-*-* && lp64 } } } } */
 /* { dg-options "-O3 -fdump-rtl-pro_and_epilogue"  } */
 
 void f(int *i)