--- /dev/null
+; RUN: opt -simplifycfg -S < %s | FileCheck %s
+
+declare { i32, i1 } @llvm.uadd.with.overflow.i32(i32, i32) #1
+
+define i32 @f(i32 %a, i32 %b) #0 {
+entry:
+ %uadd = tail call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 %a, i32 %b)
+ %cmp = extractvalue { i32, i1 } %uadd, 1
+ br i1 %cmp, label %return, label %if.end
+
+if.end: ; preds = %entry
+ %0 = extractvalue { i32, i1 } %uadd, 0
+ br label %return
+
+return: ; preds = %entry, %if.end
+ %retval.0 = phi i32 [ %0, %if.end ], [ 0, %entry ]
+ ret i32 %retval.0
+
+; CHECK-LABEL: @f(
+; CHECK-NOT: phi
+; CHECK: select
+}