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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -newgvn %s | FileCheck %s
@a = external global i32
define void @b() {
; CHECK-LABEL: @b(
; CHECK-NEXT: br i1 false, label [[C:%.*]], label [[WHILE_D:%.*]]
; CHECK: while.d:
; CHECK-NEXT: br label [[F:%.*]]
; CHECK: f:
; CHECK-NEXT: br i1 undef, label [[IF_E:%.*]], label [[C]]
; CHECK: c:
; CHECK-NEXT: br i1 undef, label [[IF_G:%.*]], label [[IF_E]]
; CHECK: if.g:
; CHECK-NEXT: store i32 undef, i32* @a
; CHECK-NEXT: br label [[WHILE_D]]
; CHECK: if.e:
; CHECK-NEXT: br label [[F]]
;
br i1 false, label %c, label %while.d
while.d: ; preds = %if.g, %0
br label %f
f: ; preds = %if.e, %while.d
br i1 undef, label %if.e, label %c
c: ; preds = %f, %0
br i1 undef, label %if.g, label %if.e
if.g: ; preds = %c
store i32 undef, i32* @a
br label %while.d
if.e: ; preds = %c, %f
br label %f
}
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