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-rw-r--r--gcc/testsuite/gcc.dg/tree-ssa/ssa-pre-24.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/ssa-pre-24.c b/gcc/testsuite/gcc.dg/tree-ssa/ssa-pre-24.c
new file mode 100644
index 000000000..f91f4af74
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/ssa-pre-24.c
@@ -0,0 +1,15 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-pre" } */
+
+void foo(int *p, double *x, int n)
+{
+ int i;
+ for (i = 0; i < n; ++i)
+ *(x + *p * i) = 0.0;
+}
+
+/* We should remove the unnecessary insertion of a phi-node and
+ _not_ end up using the phi result for replacement *p. */
+
+/* { dg-final { scan-tree-dump-not "= prephitmp" "pre" } } */
+/* { dg-final { cleanup-tree-dump "pre" } } */