test/Transforms/SimplifyCFG/hoist-common-skip-limit.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S --passes='simplifycfg<hoist-common-insts>' -simplifycfg-hoist-common-skip-limit=0 %s | FileCheck %s --check-prefix=LIMIT0
; RUN: opt -S --passes='simplifycfg<hoist-common-insts>' -simplifycfg-hoist-common-skip-limit=1 %s | FileCheck %s --check-prefix=LIMIT1
; RUN: opt -S --passes='simplifycfg<hoist-common-insts>' -simplifycfg-hoist-common-skip-limit=2 %s | FileCheck %s --check-prefix=LIMIT2

define void @f(i1 %c, ptr nocapture noundef %d, ptr nocapture noundef readonly %m, ptr nocapture noundef readonly %b) {
; LIMIT0-LABEL: @f(
; LIMIT0-NEXT:  entry:
; LIMIT0-NEXT:    [[TMP0:%.*]] = load i16, ptr [[B:%.*]], align 2
; LIMIT0-NEXT:    br i1 [[C:%.*]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
; LIMIT0:       if.then:
; LIMIT0-NEXT:    call void @no_side_effects0()
; LIMIT0-NEXT:    [[ADD:%.*]] = add nsw i16 [[TMP0]], 1
; LIMIT0-NEXT:    [[TMP1:%.*]] = load i16, ptr [[M:%.*]], align 2
; LIMIT0-NEXT:    [[U:%.*]] = add i16 [[ADD]], [[TMP1]]
; LIMIT0-NEXT:    br label [[IF_END:%.*]]
; LIMIT0:       if.else:
; LIMIT0-NEXT:    call void @no_side_effects1()
; LIMIT0-NEXT:    [[SUB:%.*]] = sub nsw i16 [[TMP0]], 1
; LIMIT0-NEXT:    [[TMP2:%.*]] = load i16, ptr [[M]], align 2
; LIMIT0-NEXT:    [[V:%.*]] = add i16 [[SUB]], [[TMP2]]
; LIMIT0-NEXT:    br label [[IF_END]]
; LIMIT0:       if.end:
; LIMIT0-NEXT:    [[UV:%.*]] = phi i16 [ [[V]], [[IF_ELSE]] ], [ [[U]], [[IF_THEN]] ]
; LIMIT0-NEXT:    store i16 [[UV]], ptr [[D:%.*]], align 2
; LIMIT0-NEXT:    ret void
;
; LIMIT1-LABEL: @f(
; LIMIT1-NEXT:  entry:
; LIMIT1-NEXT:    [[TMP0:%.*]] = load i16, ptr [[B:%.*]], align 2
; LIMIT1-NEXT:    br i1 [[C:%.*]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
; LIMIT1:       if.then:
; LIMIT1-NEXT:    call void @no_side_effects0()
; LIMIT1-NEXT:    [[ADD:%.*]] = add nsw i16 [[TMP0]], 1
; LIMIT1-NEXT:    [[TMP1:%.*]] = load i16, ptr [[M:%.*]], align 2
; LIMIT1-NEXT:    [[U:%.*]] = add i16 [[ADD]], [[TMP1]]
; LIMIT1-NEXT:    br label [[IF_END:%.*]]
; LIMIT1:       if.else:
; LIMIT1-NEXT:    call void @no_side_effects1()
; LIMIT1-NEXT:    [[SUB:%.*]] = sub nsw i16 [[TMP0]], 1
; LIMIT1-NEXT:    [[TMP2:%.*]] = load i16, ptr [[M]], align 2
; LIMIT1-NEXT:    [[V:%.*]] = add i16 [[SUB]], [[TMP2]]
; LIMIT1-NEXT:    br label [[IF_END]]
; LIMIT1:       if.end:
; LIMIT1-NEXT:    [[UV:%.*]] = phi i16 [ [[V]], [[IF_ELSE]] ], [ [[U]], [[IF_THEN]] ]
; LIMIT1-NEXT:    store i16 [[UV]], ptr [[D:%.*]], align 2
; LIMIT1-NEXT:    ret void
;
; LIMIT2-LABEL: @f(
; LIMIT2-NEXT:  entry:
; LIMIT2-NEXT:    [[TMP0:%.*]] = load i16, ptr [[B:%.*]], align 2
; LIMIT2-NEXT:    [[TMP1:%.*]] = load i16, ptr [[M:%.*]], align 2
; LIMIT2-NEXT:    br i1 [[C:%.*]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
; LIMIT2:       if.then:
; LIMIT2-NEXT:    call void @no_side_effects0()
; LIMIT2-NEXT:    [[ADD:%.*]] = add nsw i16 [[TMP0]], 1
; LIMIT2-NEXT:    [[U:%.*]] = add i16 [[ADD]], [[TMP1]]
; LIMIT2-NEXT:    br label [[IF_END:%.*]]
; LIMIT2:       if.else:
; LIMIT2-NEXT:    call void @no_side_effects1()
; LIMIT2-NEXT:    [[SUB:%.*]] = sub nsw i16 [[TMP0]], 1
; LIMIT2-NEXT:    [[V:%.*]] = add i16 [[SUB]], [[TMP1]]
; LIMIT2-NEXT:    br label [[IF_END]]
; LIMIT2:       if.end:
; LIMIT2-NEXT:    [[UV:%.*]] = phi i16 [ [[V]], [[IF_ELSE]] ], [ [[U]], [[IF_THEN]] ]
; LIMIT2-NEXT:    store i16 [[UV]], ptr [[D:%.*]], align 2
; LIMIT2-NEXT:    ret void
;
entry:
  br i1 %c, label %if.then, label %if.else

if.then:
  %0 = load i16, ptr %b, align 2
  call void @no_side_effects0()
  %add = add nsw i16 %0, 1
  %1 = load i16, ptr %m, align 2
  %u = add i16 %add, %1
  br label %if.end

if.else:
  %2 = load i16, ptr %b, align 2
  call void @no_side_effects1()
  %sub = sub nsw i16 %2, 1
  %3 = load i16, ptr %m, align 2
  %v = add i16 %sub, %3
  br label %if.end

if.end:
  %uv = phi i16 [ %v, %if.else ], [ %u, %if.then ]
  store i16 %uv, ptr %d, align 2
  ret void
}

declare void @side_effects0()
declare void @side_effects1()
declare void @no_side_effects0() readonly nounwind willreturn
declare void @no_side_effects1() readonly nounwind willreturn