; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals all --version 6
; RUN: opt -passes=instcombine -S < %s | FileCheck %s

target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"

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

; Verify that instcombine preserves TBAA tags when converting a memcpy into
; a scalar load and store.

%struct.test1 = type { float }

define void @test1(ptr nocapture %a, ptr nocapture %b) {
; CHECK-LABEL: define void @test1(
; CHECK-SAME: ptr captures(none) [[A:%.*]], ptr captures(none) [[B:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, ptr [[B]], align 4, !tbaa [[FLOAT_TBAA0:![0-9]+]]
; CHECK-NEXT:    store i32 [[TMP0]], ptr [[A]], align 4, !tbaa [[FLOAT_TBAA0]]
; CHECK-NEXT:    ret void
;
entry:
  tail call void @llvm.memcpy.p0.p0.i64(ptr align 4 %a, ptr align 4 %b, i64 4, i1 false), !tbaa.struct !3
  ret void
}

%struct.test2 = type { ptr }

define ptr @test2() {
; CHECK-LABEL: define ptr @test2() {
; CHECK-NEXT:    store i1 true, ptr poison, align 1
; CHECK-NEXT:    ret ptr poison
;
  %tmp = alloca %struct.test2, align 8
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %tmp, ptr align 8 undef, i64 8, i1 false), !tbaa.struct !4
  %tmp3 = load ptr, ptr %tmp
  ret ptr %tmp
}

define void @test3_multiple_fields(ptr nocapture %a, ptr nocapture %b) {
; CHECK-LABEL: define void @test3_multiple_fields(
; CHECK-SAME: ptr captures(none) [[A:%.*]], ptr captures(none) [[B:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    [[TMP0:%.*]] = load i64, ptr [[B]], align 4
; CHECK-NEXT:    store i64 [[TMP0]], ptr [[A]], align 4
; CHECK-NEXT:    ret void
;
entry:
  tail call void @llvm.memcpy.p0.p0.i64(ptr align 4 %a, ptr align 4 %b, i64 8, i1 false), !tbaa.struct !6
  ret void
}

define void @test4_multiple_copy_first_field(ptr nocapture %a, ptr nocapture %b) {
; CHECK-LABEL: define void @test4_multiple_copy_first_field(
; CHECK-SAME: ptr captures(none) [[A:%.*]], ptr captures(none) [[B:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, ptr [[B]], align 4, !tbaa [[FLOAT_TBAA0]]
; CHECK-NEXT:    store i32 [[TMP0]], ptr [[A]], align 4, !tbaa [[FLOAT_TBAA0]]
; CHECK-NEXT:    ret void
;
entry:
  tail call void @llvm.memcpy.p0.p0.i64(ptr align 4 %a, ptr align 4 %b, i64 4, i1 false), !tbaa.struct !6
  ret void
}

define void @test5_multiple_copy_more_than_first_field(ptr nocapture %a, ptr nocapture %b) {
; CHECK-LABEL: define void @test5_multiple_copy_more_than_first_field(
; CHECK-SAME: ptr captures(none) [[A:%.*]], ptr captures(none) [[B:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, ptr [[B]], align 4
; CHECK-NEXT:    store i32 [[TMP0]], ptr [[A]], align 4
; CHECK-NEXT:    ret void
;
entry:
  tail call void @llvm.memcpy.p0.p0.i64(ptr align 4 %a, ptr align 4 %b, i64 4, i1 false), !tbaa.struct !7
  ret void
}

!0 = !{!"Simple C/C++ TBAA"}
!1 = !{!"omnipotent char", !0}
!2 = !{!5, !5, i64 0}
!3 = !{i64 0, i64 4, !2}
!4 = !{i64 0, i64 8, null}
!5 = !{!"float", !0}
!6 = !{i64 0, i64 4, !2, i64 4, i64 4, !2}
!7 = !{i64 0, i64 2, !2, i64 4, i64 6, !2}

;.
; CHECK: attributes #[[ATTR0:[0-9]+]] = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
;.
; CHECK: [[FLOAT_TBAA0]] = !{[[META1:![0-9]+]], [[META1]], i64 0}
; CHECK: [[META1]] = !{!"float", [[META2:![0-9]+]]}
; CHECK: [[META2]] = !{!"Simple C/C++ TBAA"}
;.