llvm/test/Transforms/GuardWidening/hoist-checks.ll

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

declare void @llvm.experimental.deoptimize.isVoid(...)
declare i1 @llvm.experimental.widenable.condition()

; In the current scheme we widen `br i1 %and1`, so we try to build
; `and i1 poison, %and1` using `%call0` as insertion point.
; That's not possible, so widening will not occur in the case.
; TODO: Widen `%call0` in the test case, not a branch.
define void @test() {
; CHECK-LABEL: @test(
; CHECK-NEXT:  bb0:
; CHECK-NEXT:    [[CALL0:%.*]] = call i1 @llvm.experimental.widenable.condition()
; CHECK-NEXT:    [[AND0:%.*]] = and i1 false, [[CALL0]]
; CHECK-NEXT:    [[AND1:%.*]] = and i1 false, [[AND0]]
; CHECK-NEXT:    br i1 [[AND1]], label [[BB1:%.*]], label [[DEOPT:%.*]]
; CHECK:       bb1:
; CHECK-NEXT:    [[CALL1:%.*]] = call i1 @llvm.experimental.widenable.condition()
; CHECK-NEXT:    [[AND2:%.*]] = and i1 poison, [[CALL1]]
; CHECK-NEXT:    br i1 [[AND2]], label [[UNREACH:%.*]], label [[DEOPT]]
; CHECK:       unreach:
; CHECK-NEXT:    unreachable
; CHECK:       deopt:
; CHECK-NEXT:    call void (...) @llvm.experimental.deoptimize.isVoid(i32 0) [ "deopt"(i32 0) ]
; CHECK-NEXT:    ret void
;
bb0:
  %call0 = call i1 @llvm.experimental.widenable.condition()
  %and0 = and i1 false, %call0
  %and1 = and i1 false, %and0
  br i1 %and1, label %bb1, label %deopt

bb1:
  %call1 = call i1 @llvm.experimental.widenable.condition()
  %and2 = and i1 poison, %call1
  br i1 %and2, label %unreach, label %deopt

unreach:
  unreachable

deopt:
  call void (...) @llvm.experimental.deoptimize.isVoid(i32 0) [ "deopt"(i32 0) ]
  ret void
}