File: pr31491.ll

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llvm-toolchain-20 1%3A20.1.8-1~exp1
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=newgvn -S | FileCheck %s
;; Test that we do not infinite loop on this testcase, and that we do not try
;; to replace the phi node argument with the result of the phi node.
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"

define internal i32 @pr31491() {
; CHECK-LABEL: @pr31491(
; CHECK-NEXT:  bb5:
; CHECK-NEXT:    br label [[BB7:%.*]]
; CHECK:       bb7:
; CHECK-NEXT:    [[TMP:%.*]] = phi ptr [ [[TMP11:%.*]], [[BB10:%.*]] ], [ undef, [[BB5:%.*]] ]
; CHECK-NEXT:    br label [[BB10]]
; CHECK:       bb10:
; CHECK-NEXT:    [[TMP11]] = tail call ptr @patatino(ptr [[TMP]])
; CHECK-NEXT:    br label [[BB7]]
;
bb5:
  br label %bb7

bb7:                                              ; preds = %bb10, %bb5
  %tmp = phi ptr [ %tmp11, %bb10 ], [ undef, %bb5 ]
  br label %bb10

bb10:                                             ; preds = %bb7
  %tmp11 = tail call ptr @patatino(ptr %tmp)
  br label %bb7
}

declare ptr @patatino(ptr)