make jump threading on a phi with undef inputs happen.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83754 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Transforms/JumpThreading/basic.ll b/test/Transforms/JumpThreading/basic.ll
index 1a602a6..cab7712 100644
--- a/test/Transforms/JumpThreading/basic.ll
+++ b/test/Transforms/JumpThreading/basic.ll
@@ -1,6 +1,4 @@
; RUN: opt < %s -jump-threading -S | FileCheck %s
-; There should be no uncond branches left.
-; RUN: opt < %s -jump-threading -S | not grep {br label}
declare i32 @f1()
declare i32 @f2()
@@ -75,3 +73,35 @@
F1:
ret i32 17
}
+
+define i32 @test4(i1 %cond, i1 %cond2) {
+; CHECK: @test4
+
+ br i1 %cond, label %T1, label %F1
+
+T1:
+; CHECK: %v1 = call i32 @f1()
+; CHECK-NEXT: br label %T
+
+ %v1 = call i32 @f1()
+ br label %Merge
+
+F1:
+ %v2 = call i32 @f2()
+; CHECK: %v2 = call i32 @f2()
+; CHECK-NEXT: br i1 %cond2,
+ br label %Merge
+
+Merge:
+ %A = phi i1 [undef, %T1], [%cond2, %F1]
+ %B = phi i32 [%v1, %T1], [%v2, %F1]
+ br i1 %A, label %T2, label %F2
+
+T2:
+ call void @f3()
+ ret i32 %B
+
+F2:
+ ret i32 %B
+}
+