File: pr64289-tce.ll

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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -O3 < %s | FileCheck %s

; A miscompilation found on https://github.com/llvm/llvm-project/issues/64289.
; 1. PostOrderFunctionAttrsPass added readonly to the parameter.
; 2. TailCallElimPass modified the parameter but kept readonly.
; 3. LICMPass incorrectly hoisted the load instruction.

define void @pr64289(ptr noalias byval(i64) %x) {
; CHECK-LABEL: @pr64289(
; CHECK-NEXT:  start:
; CHECK-NEXT:    ret void
;
start:
  %new_x = alloca i64, align 8
  %x_val = load i64, ptr %x, align 8
  %is_zero = icmp eq i64 %x_val, 0
  br i1 %is_zero, label %end, label %recurse

recurse:
  store i64 0, ptr %new_x, align 8
  call void @pr64289(ptr %new_x)
  br label %end

end:
  ret void
}