Add a test where phi translation was producing a null result.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37563 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/GVNPRE/2007-06-12-PhiTranslate.ll b/test/Transforms/GVNPRE/2007-06-12-PhiTranslate.ll
new file mode 100644 (file)
index 0000000..3a6ac67
--- /dev/null
+++ b/test/Transforms/GVNPRE/2007-06-12-PhiTranslate.ll
@@ -0,0 +1,19 @@
+; RUN: llvm-as < %s | opt -gvnpre | llvm-dis
+
+define void @strength_test5(i32* %data) {
+entry:
+       br i1 false, label %cond_next16.preheader, label %cond_true
+
+cond_true:             ; preds = %entry
+       %tmp12 = icmp sgt i32 0, 0              ; <i1> [#uses=1]
+       br i1 %tmp12, label %return, label %cond_next16.preheader
+
+cond_next16.preheader:         ; preds = %cond_true, %entry
+       %i.01.1.ph = phi i32 [ 1, %entry ], [ 1, %cond_true ]           ; <i32> [#uses=1]
+       %i.01.1 = add i32 0, %i.01.1.ph         ; <i32> [#uses=0]
+       %indvar.next = add i32 0, 1             ; <i32> [#uses=0]
+       ret void
+
+return:                ; preds = %cond_true
+       ret void
+}