1 files changed, 44 insertions, 0 deletions
diff --git a/llvm/test/Transforms/JumpThreading/pr36133.ll b/llvm/test/Transforms/JumpThreading/pr36133.ll
new file mode 100644
index 00000000000..b8d8c5fac46
--- /dev/null
+++ b/llvm/test/Transforms/JumpThreading/pr36133.ll
@@ -0,0 +1,44 @@
+; RUN: opt -jump-threading -S < %s | FileCheck %s
+@global = external global i8*, align 8
+
+define i32 @foo(i32 %arg) {
+; CHECK-LABEL: @foo
+; CHECK-LABEL: bb:
+; CHECK: icmp eq
+; CHECK-NEXT: br i1 %tmp1, label %bb7, label %bb7
+bb:
+  %tmp = load i8*, i8** @global, align 8
+  %tmp1 = icmp eq i8* %tmp, null
+  br i1 %tmp1, label %bb3, label %bb2
+
+; CHECK-NOT: bb2:
+bb2:
+  br label %bb3
+
+; CHECK-NOT: bb3:
+bb3:
+  %tmp4 = phi i8 [ 1, %bb2 ], [ 0, %bb ]
+  %tmp5 = icmp eq i8 %tmp4, 0
+  br i1 %tmp5, label %bb7, label %bb6
+
+; CHECK-NOT: bb6:
+bb6:
+  br label %bb7
+
+; CHECK-LABEL: bb7:
+bb7:
+  %tmp8 = icmp eq i32 %arg, -1
+  br i1 %tmp8, label %bb9, label %bb10
+
+; CHECK-LABEL: bb9:
+bb9:
+  ret i32 0
+
+; CHECK-LABEL: bb10:
+bb10:
+  %tmp11 = icmp sgt i32 %arg, -1
+  call void @llvm.assume(i1 %tmp11)
+  ret i32 1
+}
+
+declare void @llvm.assume(i1)