fix PR6743, a case where we'd delete an instruction before using it
in some cases.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100937 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Transforms/JumpThreading/crash.ll b/test/Transforms/JumpThreading/crash.ll
index c65fd10..21620be 100644
--- a/test/Transforms/JumpThreading/crash.ll
+++ b/test/Transforms/JumpThreading/crash.ll
@@ -324,3 +324,20 @@
call void undef(i64 ptrtoint (i8* blockaddress(@test11, %A) to i64)) nounwind
unreachable
}
+
+; PR6743
+define void @test12() nounwind ssp {
+entry:
+ br label %lbl_51
+
+lbl_51: ; preds = %if.then, %entry
+ %tmp3 = phi i1 [ false, %if.then ], [ undef, %entry ] ; <i1> [#uses=2]
+ br i1 %tmp3, label %if.end12, label %if.then
+
+if.then: ; preds = %lbl_51
+ br i1 %tmp3, label %lbl_51, label %if.end12
+
+if.end12: ; preds = %if.then, %lbl_51
+ ret void
+}
+