1; RUN: opt -simplifycfg -S  < %s | FileCheck %s
2
3declare { i32, i1 } @llvm.uadd.with.overflow.i32(i32, i32) #1
4
5define i32 @f(i32 %a, i32 %b) #0 {
6entry:
7  %uadd = tail call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 %a, i32 %b)
8  %cmp = extractvalue { i32, i1 } %uadd, 1
9  br i1 %cmp, label %return, label %if.end
10
11if.end:                                           ; preds = %entry
12  %0 = extractvalue { i32, i1 } %uadd, 0
13  br label %return
14
15return:                                           ; preds = %entry, %if.end
16  %retval.0 = phi i32 [ %0, %if.end ], [ 0, %entry ]
17  ret i32 %retval.0
18
19; CHECK-LABEL: @f(
20; CHECK-NOT: phi
21; CHECK: select
22}
23