phiprop: Add testcase for already fixed case [PR116824]

This testcase was fixed by r16-906-g8da568c885dc90. Since
this is a C testcase, it would be useful to have a C testcase besides
a C++ one too.

Tested for x86_64-linux-gnu.

	PR tree-optimization/116824

gcc/testsuite/ChangeLog:

	* gcc.dg/tree-ssa/phiprop-2.c: New test.

Signed-off-by: Andrew Pinski <quic_apinski@quicinc.com>

diff --git a/gcc/testsuite/gcc.dg/tree-ssa/phiprop-2.c b/gcc/testsuite/gcc.dg/tree-ssa/phiprop-2.c
new file mode 100644 (file)
index 0000000..7181787
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/phiprop-2.c
@@ -0,0 +1,28 @@
+/* { dg-do compile } */
+/* { dg-options "-O1 -fdump-tree-phiopt2 -fdump-tree-phiprop1-details" } */
+
+/* PR tree-optimization/116824 */
+
+int g(int i, int *tt)
+{
+  const int t = 10;
+  const int *a;
+  {
+    if (t < i)
+    {
+      *tt = 1;
+      a = &t;
+    }
+    else
+    {
+      *tt = 1;
+      a = &i;
+    }
+  }
+  return *a;
+}
+
+/* Check that phiprop1 can do the insert of the loads. */
+/* { dg-final { scan-tree-dump-times "Inserting PHI for result of load" 1 "phiprop1"} } */
+/* Should be able to get MIN_EXPR in phiopt2 after cselim and phiprop. */
+/* { dg-final { scan-tree-dump-times "MIN_EXPR " 1 "phiopt2" } } */