llvm/test/Transforms/InstCombine/AArch64/dmb-intrinsics.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -S -passes=instcombine < %s | FileCheck %s
; ARM64 dmb intrinsics

target triple = "aarch64-unknown-linux-gnu"

declare void @llvm.aarch64.dmb(i32)
declare void @llvm.aarch64.dsb(i32)
declare void @clobber()
declare void @pure() memory(none) willreturn nounwind
declare i32  @llvm.ctlz.i32(i32, i1)

define void @simple() #0 {
; CHECK-LABEL: define void @simple() {
; CHECK-NEXT:    call void @llvm.aarch64.dmb(i32 10)
; CHECK-NEXT:    ret void
;
  call void @llvm.aarch64.dmb(i32 10)
  call void @llvm.aarch64.dmb(i32 10)
  ret void
}

; dmb ish (0xb) is technically stronger than ishst (0xa) but we don't merge for now
define void @simple_nonmatching() #0 {
; CHECK-LABEL: define void @simple_nonmatching() {
; CHECK-NEXT:    call void @llvm.aarch64.dmb(i32 10)
; CHECK-NEXT:    call void @llvm.aarch64.dmb(i32 11)
; CHECK-NEXT:    ret void
;
  call void @llvm.aarch64.dmb(i32 10)
  call void @llvm.aarch64.dmb(i32 11)
  ret void
}

define ptr @simple_safe_instruction(ptr %p) #0 {
; CHECK-LABEL: define ptr @simple_safe_instruction(
; CHECK-SAME: ptr [[P:%.*]]) {
; CHECK-NEXT:    [[RES:%.*]] = getelementptr inbounds nuw i8, ptr [[P]], i64 8
; CHECK-NEXT:    call void @llvm.aarch64.dmb(i32 10)
; CHECK-NEXT:    ret ptr [[RES]]
;
  call void @llvm.aarch64.dmb(i32 10)
  %res = getelementptr inbounds i8, ptr %p, i32 8
  call void @llvm.aarch64.dmb(i32 10)
  ret ptr %res
}

define i32 @simple_safe_intrinsic(i32 %n) #0 {
; CHECK-LABEL: define i32 @simple_safe_intrinsic(
; CHECK-SAME: i32 [[N:%.*]]) {
; CHECK-NEXT:    [[RES:%.*]] = call range(i32 0, 33) i32 @llvm.ctlz.i32(i32 [[N]], i1 false)
; CHECK-NEXT:    call void @llvm.aarch64.dmb(i32 10)
; CHECK-NEXT:    ret i32 [[RES]]
;
  call void @llvm.aarch64.dmb(i32 10)
  %res = call i32 @llvm.ctlz.i32(i32 %n, i1 false)
  call void @llvm.aarch64.dmb(i32 10)
  ret i32 %res
}

define void @simple_unsafe_intrinsic() #0 {
; CHECK-LABEL: define void @simple_unsafe_intrinsic() {
; CHECK-NEXT:    call void @llvm.aarch64.dmb(i32 10)
; CHECK-NEXT:    call void @llvm.aarch64.dsb(i32 10)
; CHECK-NEXT:    call void @llvm.aarch64.dmb(i32 10)
; CHECK-NEXT:    ret void
;
  call void @llvm.aarch64.dmb(i32 10)
  call void @llvm.aarch64.dsb(i32 10)
  call void @llvm.aarch64.dmb(i32 10)
  ret void
}

define void @simple_safe_unsafe_instruction(ptr %p) #0 {
; CHECK-LABEL: define void @simple_safe_unsafe_instruction(
; CHECK-SAME: ptr [[P:%.*]]) {
; CHECK-NEXT:    call void @llvm.aarch64.dmb(i32 10)
; CHECK-NEXT:    store i32 42, ptr [[P]], align 4
; CHECK-NEXT:    call void @llvm.aarch64.dmb(i32 10)
; CHECK-NEXT:    ret void
;
  call void @llvm.aarch64.dmb(i32 10)
  store i32 42, ptr %p
  call void @llvm.aarch64.dmb(i32 10)
  ret void
}

define void @simple_safe_unsafe_call(ptr %p) #0 {
; CHECK-LABEL: define void @simple_safe_unsafe_call(
; CHECK-SAME: ptr [[P:%.*]]) {
; CHECK-NEXT:    call void @llvm.aarch64.dmb(i32 10)
; CHECK-NEXT:    call void @clobber()
; CHECK-NEXT:    call void @llvm.aarch64.dmb(i32 10)
; CHECK-NEXT:    ret void
;
  call void @llvm.aarch64.dmb(i32 10)
  call void @clobber()
  call void @llvm.aarch64.dmb(i32 10)
  ret void
}

define void @simple_safe_safe_call(ptr %p) #0 {
; CHECK-LABEL: define void @simple_safe_safe_call(
; CHECK-SAME: ptr [[P:%.*]]) {
; CHECK-NEXT:    call void @llvm.aarch64.dmb(i32 10)
; CHECK-NEXT:    ret void
;
  call void @llvm.aarch64.dmb(i32 10)
  call void @pure()
  call void @llvm.aarch64.dmb(i32 10)
  ret void
}

define void @multiple_bbs1(i1 %f) #0 {
; CHECK-LABEL: define void @multiple_bbs1(
; CHECK-SAME: i1 [[F:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    br i1 [[F]], label %[[BB_T:.*]], label %[[BB_F:.*]]
; CHECK:       [[BB_T]]:
; CHECK-NEXT:    br label %[[EXIT:.*]]
; CHECK:       [[BB_F]]:
; CHECK-NEXT:    br label %[[EXIT]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    call void @llvm.aarch64.dmb(i32 10)
; CHECK-NEXT:    ret void
;
entry:
  br i1 %f, label %bb_t, label %bb_f
bb_t:
  call void @llvm.aarch64.dmb(i32 10)
  br label %exit
bb_f:
  call void @llvm.aarch64.dmb(i32 10)
  br label %exit
exit:
  call void @llvm.aarch64.dmb(i32 10)
  ret void
}

define void @multiple_bbs2(i1 %f) #0 {
; CHECK-LABEL: define void @multiple_bbs2(
; CHECK-SAME: i1 [[F:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    br i1 [[F]], label %[[BB_T:.*]], label %[[BB_F:.*]]
; CHECK:       [[BB_T]]:
; CHECK-NEXT:    br label %[[EXIT:.*]]
; CHECK:       [[BB_F]]:
; CHECK-NEXT:    br label %[[EXIT]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    call void @llvm.aarch64.dmb(i32 10)
; CHECK-NEXT:    ret void
;
entry:
  br i1 %f, label %bb_t, label %bb_f
bb_t:
  call void @llvm.aarch64.dmb(i32 10)
  br label %exit
bb_f:
  br label %exit
exit:
  call void @llvm.aarch64.dmb(i32 10)
  ret void
}

define void @multiple_bbs3(i1 %f, ptr %p) #0 {
; CHECK-LABEL: define void @multiple_bbs3(
; CHECK-SAME: i1 [[F:%.*]], ptr [[P:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    br i1 [[F]], label %[[BB_T:.*]], label %[[BB_F:.*]]
; CHECK:       [[BB_T]]:
; CHECK-NEXT:    br label %[[EXIT:.*]]
; CHECK:       [[BB_F]]:
; CHECK-NEXT:    store i32 42, ptr [[P]], align 4
; CHECK-NEXT:    br label %[[EXIT]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    call void @llvm.aarch64.dmb(i32 10)
; CHECK-NEXT:    ret void
;
entry:
  br i1 %f, label %bb_t, label %bb_f
bb_t:
  call void @llvm.aarch64.dmb(i32 10)
  br label %exit
bb_f:
  store i32 42, ptr %p
  br label %exit
exit:
  call void @llvm.aarch64.dmb(i32 10)
  ret void
}

define void @multiple_bbs_unsafe(i1 %f, ptr %p) #0 {
; CHECK-LABEL: define void @multiple_bbs_unsafe(
; CHECK-SAME: i1 [[F:%.*]], ptr [[P:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    br i1 [[F]], label %[[BB_T:.*]], label %[[BB_F:.*]]
; CHECK:       [[BB_T]]:
; CHECK-NEXT:    call void @llvm.aarch64.dmb(i32 10)
; CHECK-NEXT:    store i32 42, ptr [[P]], align 4
; CHECK-NEXT:    br label %[[EXIT:.*]]
; CHECK:       [[BB_F]]:
; CHECK-NEXT:    br label %[[EXIT]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    call void @llvm.aarch64.dmb(i32 10)
; CHECK-NEXT:    ret void
;
entry:
  br i1 %f, label %bb_t, label %bb_f
bb_t:
  call void @llvm.aarch64.dmb(i32 10)
  store i32 42, ptr %p
  br label %exit
bb_f:
  call void @llvm.aarch64.dmb(i32 10)
  br label %exit
exit:
  call void @llvm.aarch64.dmb(i32 10)
  ret void
}