test/Transforms/CallSiteSplitting/callsite-split-callbr.ll

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

; Check that we can split the critical edge between Top and CallSiteBB, and
; rewrite the first callbr's indirect destination correctly.

define void @caller() {
; CHECK-LABEL: @caller(
; CHECK-NEXT:  Top:
; CHECK-NEXT:    callbr void asm sideeffect "", "X,~{dirflag},~{fpsr},~{flags}"(i8* blockaddress(@caller, [[TOP_SPLIT:%.*]]))
; CHECK-NEXT:    to label [[NEXTCOND:%.*]] [label %Top.split]
; CHECK-LABEL: Top.split:
; CHECK-NEXT:    call void @callee(i1 false)
; CHECK-NEXT:    br label [[CALLSITEBB:%.*]]
; CHECK-LABEL: NextCond:
; CHECK-NEXT:    br label [[NEXTCOND_SPLIT:%.*]]
; CHECK-LABEL: NextCond.split:
; CHECK-NEXT:    call void @callee(i1 true)
; CHECK-NEXT:    br label [[CALLSITEBB]]
; CHECK-LABEL: CallSiteBB:
; CHECK-NEXT:    [[PHI:%.*]] = phi i1 [ false, [[TOP_SPLIT]] ], [ true, [[NEXTCOND_SPLIT]] ]
; CHECK-NEXT:    callbr void asm sideeffect "", "r,X,~{dirflag},~{fpsr},~{flags}"(i1 [[PHI]], i8* blockaddress(@caller, [[END2:%.*]]))
; CHECK-NEXT:    to label [[END:%.*]] [label %End2]
; CHECK-LABEL: End:
; CHECK-NEXT:    ret void
; CHECK-LABEL: End2:
; CHECK-NEXT:    ret void
;
Top:
  callbr void asm sideeffect "", "X,~{dirflag},~{fpsr},~{flags}"(i8* blockaddress(@caller, %CallSiteBB))
  to label %NextCond [label %CallSiteBB]

NextCond:
  br label %CallSiteBB

CallSiteBB:
  %phi = phi i1 [0, %Top],[1, %NextCond]
  call void @callee(i1 %phi)
  callbr void asm sideeffect "", "r,X,~{dirflag},~{fpsr},~{flags}"(i1 %phi, i8* blockaddress(@caller, %End2))
  to label %End [label %End2]

End:
  ret void
End2:
  ret void
}

define void @callee(i1 %b) {
; CHECK-LABEL: @callee(
; CHECK-NEXT:    ret void
;
  ret void
}