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From ab9047340859545251be5c074524d69327901407 Mon Sep 17 00:00:00 2001
From: jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue, 3 May 2011 13:06:06 +0000
Subject: [PATCH] PR target/48774
* config/i386/i386.c (ix86_match_ccmode): For CC{A,C,O,S}mode
only succeed if req_mode is the same as set_mode.
* gcc.dg/pr48774.c: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_6-branch@173302 138bc75d-0d04-0410-961f-82ee72b054a4
index f3a8a0c..e8210c5 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -17194,11 +17194,15 @@ ix86_match_ccmode (rtx insn, enum machine_mode req_mode)
if (req_mode == CCZmode)
return false;
/* FALLTHRU */
+ case CCZmode:
+ break;
+
case CCAmode:
case CCCmode:
case CCOmode:
case CCSmode:
- case CCZmode:
+ if (set_mode != req_mode)
+ return false;
break;
default:
new file mode 100644
index 0000000..91ce361
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr48774.c
@@ -0,0 +1,38 @@
+/* PR target/48774 */
+/* { dg-do run } */
+/* { dg-options "-O2 -funroll-loops" } */
+
+extern void abort (void);
+unsigned long int s[24]
+ = { 12, ~1, 12, ~2, 12, ~4, 12, ~8, 12, ~16, 12, ~32,
+ 12, ~64, 12, ~128, 12, ~256, 12, ~512, 12, ~1024, 12, ~2048 };
+struct { int n; unsigned long *e[12]; } g
+ = { 12, { &s[0], &s[2], &s[4], &s[6], &s[8], &s[10], &s[12], &s[14],
+ &s[16], &s[18], &s[20], &s[22] } };
+int c[12];
+
+__attribute__((noinline, noclone)) void
+foo (void)
+{
+ int i, j;
+ for (i = 0; i < g.n; i++)
+ for (j = 0; j < g.n; j++)
+ {
+ if (i == j && j < g.e[0][0] && (g.e[i][1] & (1UL << j)))
+ abort ();
+ if (j < g.e[0][0] && (g.e[i][1] & (1UL << j)))
+ c[i]++;
+ }
+}
+
+int
+main ()
+{
+ int i;
+ asm volatile ("" : "+m" (s), "+m" (g), "+m" (c));
+ foo ();
+ for (i = 0; i < 12; i++)
+ if (c[i] != 11)
+ abort ();
+ return 0;
+}
--
1.7.0.4
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