add a testcase, which we already handle

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17737 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/InstCombine/phi.ll b/test/Transforms/InstCombine/phi.ll
index 7459332009c382c1f5b6eb2e69b6f0a4ceeb436a..c29700757158377604b41738f6a578fb6e65cf13 100644 (file)
--- a/test/Transforms/InstCombine/phi.ll
+++ b/test/Transforms/InstCombine/phi.ll
@@ -33,7 +33,7 @@ Exit:
        ret int %B
 }
 
-int %test3(bool %b) {
+int %test4(bool %b) {
 BB0:  ret int 7                                 ; Loop is unreachable
 
 Loop:
@@ -43,3 +43,13 @@ L2:
        br label %Loop
 }
 
+int %test5(int %a, bool %b) {
+BB0: br label %Loop
+
+Loop:
+        %B = phi int [%A, %BB0], [undef, %Loop]    ; PHI has same value always.
+        br bool %b, label %Loop, label %Exit
+Exit:
+        ret int %B
+}
+