Attachment 149557 Details for Bug 229366 – Patch that fixes the bug in 4.1

[patch] Patch that fixes the bug in 4.1

gcc-cse-pr30643.patch (text/plain), 1.55 KB, created by Alexandre Oliva on 2007-03-08 10:05:06 UTC

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Creator: Alexandre Oliva

Created: 2007-03-08 10:05:06 UTC

Size: 1.55 KB

patch

obsolete

>for  gcc/ChangeLog
>from  Alexandre Oliva  <aoliva@redhat.com>
>
>	PR rtl-optimization/30643
>	* cse.c (cse_insn): Recompute dest_hash after insert_regs for
>	dest_addr_elt.
>
>for  gcc/testsuite/ChangeLog
>from  Alexandre Oliva  <aoliva@redhat.com>
>
>	PR rtl-optimization/30643
>	* gcc.dg/pr30643.c: New.
>
>Index: gcc/cse.c
>===================================================================
>--- gcc/cse.c.orig	2007-03-08 04:52:32.000000000 -0300
>+++ gcc/cse.c	2007-03-08 05:54:07.000000000 -0300
>@@ -6016,8 +6016,11 @@ cse_insn (rtx insn, rtx libcall_insn)
> 		{
> 		  if (insert_regs (x, NULL, 0))
> 		    {
>+		      rtx dest = SET_DEST (sets[i].rtl);
>+
> 		      rehash_using_reg (x);
> 		      hash = HASH (x, mode);
>+		      sets[i].dest_hash = HASH (dest, GET_MODE (dest));
> 		    }
> 		  elt = insert (x, NULL, hash, mode);
> 		}
>Index: gcc/testsuite/gcc.dg/pr30643.c
>===================================================================
>--- /dev/null	1970-01-01 00:00:00.000000000 +0000
>+++ gcc/testsuite/gcc.dg/pr30643.c	2007-03-08 06:01:42.000000000 -0300
>@@ -0,0 +1,26 @@
>+/* { dg-do compile } */
>+/* { dg-options "-O2" } */
>+/* { dg-final { scan-assembler-not "undefined" } } */
>+
>+/* Make sure we optimize all calls away.  */
>+
>+extern void undefined (void);
>+struct s { int a, b; };
>+void bar (struct s *ps,  int *p, int *__restrict__ rp, int *__restrict__ rq)
>+{
>+  ps->a = 0;
>+  ps->b = 1;
>+  if (ps->a != 0)
>+    undefined ();
>+  p[0] = 0;
>+  p[1] = 1;
>+  if (p[0] != 0)
>+    undefined ();
>+  rp[0] = 0;
>+  rq[0] = 1;
>+  if (rp[0] != 0)
>+    undefined ();
>+}
>+int main (void) {
>+  return 0;
>+}

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Attachments on bug 229366: 149557