Hello!
The testcase failed to compile with 4.5 with spill failure, but
compiles OK with 4.6+. Attached patch adds the test to gcc testsuite,
so the bug can be closed.
2012-09-02 Uros Bizjak <ubiz...@gmail.com>
PR target/42295
* g++.dg/opt/pr42295.C: New test.
Tested on x86_64-pc-linux-gnu {,-m32} and committed to mainline SVN.
Uros.
Index: g++.dg/opt/pr42295.C
===================================================================
--- g++.dg/opt/pr42295.C (revision 0)
+++ g++.dg/opt/pr42295.C (working copy)
@@ -0,0 +1,18 @@
+// { dg-do compile { target i?86-*-* x86_64-*-* } }
+// { dg-options "-O1 -fschedule-insns -fselective-scheduling" }
+
+extern int f (...);
+
+int
+testsum (void *a, int k, int n)
+{
+ int i, j;
+
+ f (n / 2);
+ for (i = 0; i < n; i += 8)
+ for (j = 0; j < n; j += 8)
+ while (k < n)
+ k += 8;
+
+ return k;
+}
