--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/llvm/test/Transforms/StructurizeCFG/branch-on-argument.ll	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,50 @@
+; RUN: opt -S -o - -structurizecfg < %s | FileCheck %s
+
+; CHECK-LABEL: @invert_branch_on_arg_inf_loop(
+; CHECK: entry:
+; CHECK: %arg.inv = xor i1 %arg, true
+define void @invert_branch_on_arg_inf_loop(i32 addrspace(1)* %out, i1 %arg) {
+entry:
+  br i1 %arg, label %for.end, label %sesestart
+sesestart:
+  br label %for.body
+
+for.body:                                         ; preds = %entry, %for.body
+  store i32 999, i32 addrspace(1)* %out, align 4
+  br i1 %arg, label %for.body, label %seseend
+seseend:
+  ret void
+
+for.end:                                          ; preds = %Flow
+  ret void
+}
+
+
+; CHECK-LABEL: @invert_branch_on_arg_jump_into_loop(
+; CHECK: entry:
+; CHECK: %arg.inv = xor i1 %arg, true
+; CHECK: Flow:
+; CHECK: Flow1:
+define void @invert_branch_on_arg_jump_into_loop(i32 addrspace(1)* %out, i32 %n, i1 %arg) {
+entry:
+  br label %for.body
+
+for.body:
+  %i = phi i32 [0, %entry], [%i.inc, %end.loop]
+  %ptr = getelementptr i32, i32 addrspace(1)* %out, i32 %i
+  store i32 %i, i32 addrspace(1)* %ptr, align 4
+  br i1 %arg, label %mid.loop, label %end.loop
+
+mid.loop:
+  store i32 333, i32 addrspace(1)* %out, align 4
+  br label %for.end
+
+end.loop:
+  %i.inc = add i32 %i, 1
+  %cmp = icmp ne i32 %i.inc, %n
+  br i1 %cmp, label %for.body, label %for.end
+
+for.end:
+  ret void
+}
+