... which is confused about a useful testcase not using uninitialized
variables.
Testcase committed.
Richard.
2012-01-19 Richard Guenther <rguent...@suse.de>
PR tree-optimization/37997
* gcc.dg/tree-ssa/ssa-pre-28.c: New testcase.
Index: gcc/testsuite/gcc.dg/tree-ssa/ssa-pre-28.c
===================================================================
--- gcc/testsuite/gcc.dg/tree-ssa/ssa-pre-28.c (revision 0)
+++ gcc/testsuite/gcc.dg/tree-ssa/ssa-pre-28.c (revision 0)
@@ -0,0 +1,21 @@
+/* PR37997 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-pre-details" } */
+
+int foo (int i, int b, int result)
+{
+ int mask;
+ if (b)
+ mask = -1;
+ else
+ mask = 0;
+ result = i + 1;
+ result = result & mask;
+ return result;
+}
+
+/* We should insert i + 1 into the if (b) path as well as the simplified
+ i + 1 & -1 expression. And do replacement with two PHI temps. */
+
+/* { dg-final { scan-tree-dump-times "with prephitmp" 2 "pre" } } */
+/* { dg-final { cleanup-tree-dump "pre" } } */
