llvm/test/Analysis/LazyCallGraph/remove-dead-function-spurious-ref-edge.ll


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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=argpromotion,inline -S %s | FileCheck %s

; argpromo removes @b's parameter (removing @c's reference to @a without updating the ref edge in the call graph), then the inliner inlines @a into @d and attempts to remove @a.

define internal void @a() alwaysinline {
  call void @e(ptr @c)
  ret void
}

define internal void @b(ptr) noinline {
; CHECK-LABEL: @b(
; CHECK-NEXT:    ret void
;
  ret void
}

define internal void @c() noinline {
; CHECK-LABEL: @c(
; CHECK-NEXT:    call void @b()
; CHECK-NEXT:    ret void
;
  call void @b(ptr @a)
  ret void
}

define void @d() {
; CHECK-LABEL: @d(
; CHECK-NEXT:    call void @e(ptr @c)
; CHECK-NEXT:    ret void
;
  call void @a()
  ret void
}

declare void @e(ptr);