reference, declaration → definition
definition → references, declarations, derived classes, virtual overrides
reference to multiple definitions → definitions
unreferenced

    1
    2
    3
    4
    5
    6
    7
    8
    9
   10
   11
   12
   13
   14
   15
   16
   17
   18
   19
   20
   21
   22
   23
   24
   25
   26
   27
   28
   29

; RUN: opt < %s -inline -reassociate -S | FileCheck %s

; This test case exposed a bug in reassociate where EraseInst's
; removal of a dead call wasn't recognized as changing the IR.
; So when runOnFunction propagated the "made changes" upwards
; to the CallGraphSCCPass it signalled that no changes had been
; made, so CallGraphSCCPass assumed that the old CallGraph,
; as known by that pass manager, still was up-to-date.
;
; This was detected as an assert when trying to remove the
; no longer used function 'bar' (due to incorrect reference
; count in the CallGraph).

define void @foo() {
; CHECK-LABEL: @foo(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    ret void
entry:
  call void @bar()
  ret void
}

define internal void @bar() noinline nounwind readnone {
; CHECK-NOT: bar
entry:
  ret void
}