reapply 86289, 86278, 86270, 86267, 86266 & 86264 plus a fix
(making pred factoring only happen if threading is guaranteed
to be successful).
This now survives an X86-64 bootstrap of llvm-gcc.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86355 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Transforms/JumpThreading/basic.ll b/test/Transforms/JumpThreading/basic.ll
index 3d936b8..7b444ad 100644
--- a/test/Transforms/JumpThreading/basic.ll
+++ b/test/Transforms/JumpThreading/basic.ll
@@ -170,5 +170,36 @@
}
+;; This tests that the branch in 'merge' can be cloned up into T1.
+;; rdar://7367025
+define i32 @test7(i1 %cond, i1 %cond2) {
+Entry:
+; CHECK: @test7
+ %v1 = call i32 @f1()
+ br i1 %cond, label %Merge, label %F1
+F1:
+ %v2 = call i32 @f2()
+ br label %Merge
+
+Merge:
+ %B = phi i32 [%v1, %Entry], [%v2, %F1]
+ %M = icmp ne i32 %B, %v1
+ %N = icmp eq i32 %B, 47
+ %O = and i1 %M, %N
+ br i1 %O, label %T2, label %F2
+
+; CHECK: Merge:
+; CHECK-NOT: phi
+; CHECK-NEXT: %v2 = call i32 @f2()
+
+T2:
+ call void @f3()
+ ret i32 %B
+
+F2:
+ ret i32 %B
+; CHECK: F2:
+; CHECK-NEXT: phi i32
+}