test/Transforms/IROutliner/outline-memcpy.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --include-generated-funcs
; RUN: opt -S -passes=verify,iroutliner -ir-outlining-no-cost < %s | FileCheck %s

; This test checks that we successfully outline identical memcpy instructions.

declare void @llvm.memcpy.p0.p0.i64(ptr nocapture writeonly, ptr nocapture readonly, i64, i1)

define i8 @function1(ptr noalias %s, ptr noalias %d, i64 %len) {
entry:
  %a = load i8, ptr %s
  %b = load i8, ptr %d
  call void @llvm.memcpy.p0.p0.i64(ptr %d, ptr %s, i64 %len, i1 false)
  %c = add i8 %a, %b
  %ret = load i8, ptr %s
  ret i8 %ret
}

define i8 @function2(ptr noalias %s, ptr noalias %d, i64 %len) {
entry:
  %a = load i8, ptr %s
  %b = load i8, ptr %d
  call void @llvm.memcpy.p0.p0.i64(ptr %d, ptr %s, i64 %len, i1 false)
  %c = add i8 %a, %b
  %ret = load i8, ptr %s
  ret i8 %ret
}
; CHECK-LABEL: @function1(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[RET_LOC:%.*]] = alloca i8, align 1
; CHECK-NEXT:    call void @llvm.lifetime.start.p0(i64 -1, ptr [[RET_LOC]])
; CHECK-NEXT:    call void @outlined_ir_func_0(ptr [[S:%.*]], ptr [[D:%.*]], i64 [[LEN:%.*]], ptr [[RET_LOC]])
; CHECK-NEXT:    [[RET_RELOAD:%.*]] = load i8, ptr [[RET_LOC]], align 1
; CHECK-NEXT:    call void @llvm.lifetime.end.p0(i64 -1, ptr [[RET_LOC]])
; CHECK-NEXT:    ret i8 [[RET_RELOAD]]
;
;
; CHECK-LABEL: @function2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[RET_LOC:%.*]] = alloca i8, align 1
; CHECK-NEXT:    call void @llvm.lifetime.start.p0(i64 -1, ptr [[RET_LOC]])
; CHECK-NEXT:    call void @outlined_ir_func_0(ptr [[S:%.*]], ptr [[D:%.*]], i64 [[LEN:%.*]], ptr [[RET_LOC]])
; CHECK-NEXT:    [[RET_RELOAD:%.*]] = load i8, ptr [[RET_LOC]], align 1
; CHECK-NEXT:    call void @llvm.lifetime.end.p0(i64 -1, ptr [[RET_LOC]])
; CHECK-NEXT:    ret i8 [[RET_RELOAD]]
;
;
; CHECK: define internal void @outlined_ir_func_0(
; CHECK-NEXT:  newFuncRoot:
; CHECK-NEXT:    br label [[ENTRY_TO_OUTLINE:%.*]]
; CHECK:       entry_to_outline:
; CHECK-NEXT:    [[A:%.*]] = load i8, ptr [[TMP0:%.*]], align 1
; CHECK-NEXT:    [[B:%.*]] = load i8, ptr [[TMP1:%.*]], align 1
; CHECK-NEXT:    call void @llvm.memcpy.p0.p0.i64(ptr [[TMP1]], ptr [[TMP0]], i64 [[TMP2:%.*]], i1 false)
; CHECK-NEXT:    [[C:%.*]] = add i8 [[A]], [[B]]
; CHECK-NEXT:    [[RET:%.*]] = load i8, ptr [[TMP0]], align 1
; CHECK-NEXT:    br label [[ENTRY_AFTER_OUTLINE_EXITSTUB:%.*]]
; CHECK:       entry_after_outline.exitStub:
; CHECK-NEXT:    store i8 [[RET]], ptr [[TMP3:%.*]], align 1
; CHECK-NEXT:    ret void
;