1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt -S -memcpyopt < %s | FileCheck %s
3
4define void @test_copy_uninit([1000 x [1000 x i32]]* %arg) {
5; CHECK-LABEL: @test_copy_uninit(
6; CHECK-NEXT:  start:
7; CHECK-NEXT:    [[ALLOCA:%.*]] = alloca [1000 x i32], align 4
8; CHECK-NEXT:    [[ALLOCA_I8:%.*]] = bitcast [1000 x i32]* [[ALLOCA]] to i8*
9; CHECK-NEXT:    [[BEGIN:%.*]] = getelementptr inbounds [1000 x [1000 x i32]], [1000 x [1000 x i32]]* [[ARG:%.*]], i64 0, i64 0
10; CHECK-NEXT:    [[END:%.*]] = getelementptr inbounds [1000 x [1000 x i32]], [1000 x [1000 x i32]]* [[ARG]], i64 0, i64 1000
11; CHECK-NEXT:    br label [[LOOP:%.*]]
12; CHECK:       loop:
13; CHECK-NEXT:    [[CURRENT:%.*]] = phi [1000 x i32]* [ [[BEGIN]], [[START:%.*]] ], [ [[NEXT:%.*]], [[LOOP]] ]
14; CHECK-NEXT:    [[CURRENT_I8:%.*]] = bitcast [1000 x i32]* [[CURRENT]] to i8*
15; CHECK-NEXT:    [[NEXT]] = getelementptr inbounds [1000 x i32], [1000 x i32]* [[CURRENT]], i64 1
16; CHECK-NEXT:    [[COND:%.*]] = icmp eq [1000 x i32]* [[NEXT]], [[END]]
17; CHECK-NEXT:    br i1 [[COND]], label [[EXIT:%.*]], label [[LOOP]]
18; CHECK:       exit:
19; CHECK-NEXT:    ret void
20;
21start:
22  %alloca = alloca [1000 x i32], align 4
23  %alloca.i8 = bitcast [1000 x i32]* %alloca to i8*
24  %begin = getelementptr inbounds [1000 x [1000 x i32]], [1000 x [1000 x i32]]* %arg, i64 0, i64 0
25  %end = getelementptr inbounds [1000 x [1000 x i32]], [1000 x [1000 x i32]]* %arg, i64 0, i64 1000
26  br label %loop
27
28loop:                                             ; preds = %loop, %start
29  %current = phi [1000 x i32]* [ %begin, %start ], [ %next, %loop ]
30  %current.i8 = bitcast [1000 x i32]* %current to i8*
31  call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 4 dereferenceable(4000) %current.i8, i8* nonnull align 4 dereferenceable(4000) %alloca.i8, i64 4000, i1 false)
32  %next = getelementptr inbounds [1000 x i32], [1000 x i32]* %current, i64 1
33  %cond = icmp eq [1000 x i32]* %next, %end
34  br i1 %cond, label %exit, label %loop
35
36exit:                                             ; preds = %loop
37  ret void
38}
39
40define void @test_copy_zero([1000 x [1000 x i32]]* %arg) {
41; CHECK-LABEL: @test_copy_zero(
42; CHECK-NEXT:  start:
43; CHECK-NEXT:    [[ALLOCA:%.*]] = alloca [1000 x i32], align 4
44; CHECK-NEXT:    [[ALLOCA_I8:%.*]] = bitcast [1000 x i32]* [[ALLOCA]] to i8*
45; CHECK-NEXT:    call void @llvm.memset.p0i8.i64(i8* nonnull align 4 dereferenceable(4000) [[ALLOCA_I8]], i8 0, i64 4000, i1 false)
46; CHECK-NEXT:    [[BEGIN:%.*]] = getelementptr inbounds [1000 x [1000 x i32]], [1000 x [1000 x i32]]* [[ARG:%.*]], i64 0, i64 0
47; CHECK-NEXT:    [[END:%.*]] = getelementptr inbounds [1000 x [1000 x i32]], [1000 x [1000 x i32]]* [[ARG]], i64 0, i64 1000
48; CHECK-NEXT:    br label [[LOOP:%.*]]
49; CHECK:       loop:
50; CHECK-NEXT:    [[CURRENT:%.*]] = phi [1000 x i32]* [ [[BEGIN]], [[START:%.*]] ], [ [[NEXT:%.*]], [[LOOP]] ]
51; CHECK-NEXT:    [[CURRENT_I8:%.*]] = bitcast [1000 x i32]* [[CURRENT]] to i8*
52; CHECK-NEXT:    call void @llvm.memset.p0i8.i64(i8* align 4 [[CURRENT_I8]], i8 0, i64 4000, i1 false)
53; CHECK-NEXT:    [[NEXT]] = getelementptr inbounds [1000 x i32], [1000 x i32]* [[CURRENT]], i64 1
54; CHECK-NEXT:    [[COND:%.*]] = icmp eq [1000 x i32]* [[NEXT]], [[END]]
55; CHECK-NEXT:    br i1 [[COND]], label [[EXIT:%.*]], label [[LOOP]]
56; CHECK:       exit:
57; CHECK-NEXT:    ret void
58;
59start:
60  %alloca = alloca [1000 x i32], align 4
61  %alloca.i8 = bitcast [1000 x i32]* %alloca to i8*
62  call void @llvm.memset.p0i8.i64(i8* nonnull align 4 dereferenceable(4000) %alloca.i8, i8 0, i64 4000, i1 false)
63  %begin = getelementptr inbounds [1000 x [1000 x i32]], [1000 x [1000 x i32]]* %arg, i64 0, i64 0
64  %end = getelementptr inbounds [1000 x [1000 x i32]], [1000 x [1000 x i32]]* %arg, i64 0, i64 1000
65  br label %loop
66
67loop:                                             ; preds = %loop, %start
68  %current = phi [1000 x i32]* [ %begin, %start ], [ %next, %loop ]
69  %current.i8 = bitcast [1000 x i32]* %current to i8*
70  call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 4 dereferenceable(4000) %current.i8, i8* nonnull align 4 dereferenceable(4000) %alloca.i8, i64 4000, i1 false)
71  %next = getelementptr inbounds [1000 x i32], [1000 x i32]* %current, i64 1
72  %cond = icmp eq [1000 x i32]* %next, %end
73  br i1 %cond, label %exit, label %loop
74
75exit:                                             ; preds = %loop
76  ret void
77}
78
79declare void @llvm.memset.p0i8.i64(i8* nocapture writeonly, i8, i64, i1 immarg)
80declare void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias nocapture writeonly, i8* noalias nocapture readonly, i64, i1 immarg)
81