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[4.6 Regression]: [alpha] -fcompare-debug failure due to sched1 pass
http://gcc.gnu.org/PR56023
https://bugs.gentoo.org/451680
Author: uros
Date: Mon Jan 21 18:02:57 2013
New Revision: 195345
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=195345
Log:
PR rtl-optimization/56023
* haifa-sched.c (fix_inter_tick): Do not update ticks of instructions,
dependent on debug instruction.
testsuite/ChangeLog:
PR rtl-optimization/56023
* gcc.dg/pr56023.c: New test.
--- a/gcc/haifa-sched.c
+++ b/gcc/haifa-sched.c
@@ -3684,6 +3684,9 @@ fix_inter_tick (rtx head, rtx tail)
INSN_TICK (head) = tick;
}
+ if (DEBUG_INSN_P (head))
+ continue;
+
FOR_EACH_DEP (head, SD_LIST_RES_FORW, sd_it, dep)
{
rtx next;
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr56023.c
@@ -0,0 +1,19 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fcompare-debug" } */
+
+void
+foo (char *c)
+{
+ unsigned int x = 0;
+ unsigned int i;
+
+ for (i = 0; c[i]; i++)
+ {
+ if (i >= 5 && x != 1)
+ break;
+ else if (c[i] == ' ')
+ x = i;
+ else if (c[i] == '/' && c[i + 1] != ' ' && i)
+ x = i + 1;
+ }
+}
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