test/Transforms/CallSiteSplitting/musttail.ll

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

define i8* @caller(i8* %a, i8* %b) {
; CHECK-LABEL: @caller(
; CHECK-NEXT:  Top:
; CHECK-NEXT:    [[C:%.*]] = icmp eq i8* [[A:%.*]], null
; CHECK-NEXT:    br i1 [[C]], label [[TAIL_PREDBB1_SPLIT:%.*]], label [[TBB:%.*]]
; CHECK:       TBB:
; CHECK-NEXT:    [[C2:%.*]] = icmp eq i8* [[B:%.*]], null
; CHECK-NEXT:    br i1 [[C2]], label [[TAIL_PREDBB2_SPLIT:%.*]], label [[END:%.*]]
; CHECK:       Tail.predBB1.split:
; CHECK-NEXT:    [[TMP0:%.*]] = musttail call i8* @callee(i8* null, i8* [[B]])
; CHECK-NEXT:    [[CB1:%.*]] = bitcast i8* [[TMP0]] to i8*
; CHECK-NEXT:    ret i8* [[CB1]]
; CHECK:       Tail.predBB2.split:
; CHECK-NEXT:    [[TMP1:%.*]] = musttail call i8* @callee(i8* nonnull [[A]], i8* null)
; CHECK-NEXT:    [[CB2:%.*]] = bitcast i8* [[TMP1]] to i8*
; CHECK-NEXT:    ret i8* [[CB2]]
; CHECK:       End:
; CHECK-NEXT:    ret i8* null
;
Top:
  %c = icmp eq i8* %a, null
  br i1 %c, label %Tail, label %TBB
TBB:
  %c2 = icmp eq i8* %b, null
  br i1 %c2, label %Tail, label %End
Tail:
  %ca = musttail call i8* @callee(i8* %a, i8* %b)
  %cb = bitcast i8* %ca to i8*
  ret i8* %cb
End:
  ret i8* null
}

define i8* @callee(i8* %a, i8* %b) noinline {
; CHECK-LABEL: define i8* @callee(
; CHECK-NEXT:    ret i8* [[A:%.*]]
;
  ret i8* %a
}

define i8* @no_cast_caller(i8* %a, i8* %b) {
; CHECK-LABEL: @no_cast_caller(
; CHECK-NEXT:  Top:
; CHECK-NEXT:    [[C:%.*]] = icmp eq i8* [[A:%.*]], null
; CHECK-NEXT:    br i1 [[C]], label [[TAIL_PREDBB1_SPLIT:%.*]], label [[TBB:%.*]]
; CHECK:       TBB:
; CHECK-NEXT:    [[C2:%.*]] = icmp eq i8* [[B:%.*]], null
; CHECK-NEXT:    br i1 [[C2]], label [[TAIL_PREDBB2_SPLIT:%.*]], label [[END:%.*]]
; CHECK:       Tail.predBB1.split:
; CHECK-NEXT:    [[TMP0:%.*]] = musttail call i8* @callee(i8* null, i8* [[B]])
; CHECK-NEXT:    ret i8* [[TMP0]]
; CHECK:       Tail.predBB2.split:
; CHECK-NEXT:    [[TMP1:%.*]] = musttail call i8* @callee(i8* nonnull [[A]], i8* null)
; CHECK-NEXT:    ret i8* [[TMP1]]
; CHECK:       End:
; CHECK-NEXT:    ret i8* null
;
Top:
  %c = icmp eq i8* %a, null
  br i1 %c, label %Tail, label %TBB
TBB:
  %c2 = icmp eq i8* %b, null
  br i1 %c2, label %Tail, label %End
Tail:
  %ca = musttail call i8* @callee(i8* %a, i8* %b)
  ret i8* %ca
End:
  ret i8* null
}

define void @void_caller(i8* %a, i8* %b) {
; CHECK-LABEL: @void_caller(
; CHECK-NEXT:  Top:
; CHECK-NEXT:    [[C:%.*]] = icmp eq i8* [[A:%.*]], null
; CHECK-NEXT:    br i1 [[C]], label [[TAIL_PREDBB1_SPLIT:%.*]], label [[TBB:%.*]]
; CHECK:       TBB:
; CHECK-NEXT:    [[C2:%.*]] = icmp eq i8* [[B:%.*]], null
; CHECK-NEXT:    br i1 [[C2]], label [[TAIL_PREDBB2_SPLIT:%.*]], label [[END:%.*]]
; CHECK:       Tail.predBB1.split:
; CHECK-NEXT:    musttail call void @void_callee(i8* null, i8* [[B]])
; CHECK-NEXT:    ret void
; CHECK:       Tail.predBB2.split:
; CHECK-NEXT:    musttail call void @void_callee(i8* nonnull [[A]], i8* null)
; CHECK-NEXT:    ret void
; CHECK:       End:
; CHECK-NEXT:    ret void
;
Top:
  %c = icmp eq i8* %a, null
  br i1 %c, label %Tail, label %TBB
TBB:
  %c2 = icmp eq i8* %b, null
  br i1 %c2, label %Tail, label %End
Tail:
  musttail call void @void_callee(i8* %a, i8* %b)
  ret void
End:
  ret void
}

define void @void_callee(i8* %a, i8* %b) noinline {
; CHECK-LABEL: define void @void_callee(
; CHECK-NEXT:    ret void
;
  ret void
}