1; Test lib call simplification of __memmove_chk calls with various values
2; for dstlen and len.
3;
4; RUN: opt < %s -instcombine -S | FileCheck %s
5
6target 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"
7
8%struct.T1 = type { [100 x i32], [100 x i32], [1024 x i8] }
9%struct.T2 = type { [100 x i32], [100 x i32], [1024 x i8] }
10%struct.T3 = type { [100 x i32], [100 x i32], [2048 x i8] }
11
12@t1 = common global %struct.T1 zeroinitializer
13@t2 = common global %struct.T2 zeroinitializer
14@t3 = common global %struct.T3 zeroinitializer
15
16; Check cases where dstlen >= len.
17
18define i8* @test_simplify1() {
19; CHECK-LABEL: @test_simplify1(
20  %dst = bitcast %struct.T1* @t1 to i8*
21  %src = bitcast %struct.T2* @t2 to i8*
22
23; CHECK-NEXT: call void @llvm.memmove.p0i8.p0i8.i64(i8* bitcast (%struct.T1* @t1 to i8*), i8* bitcast (%struct.T2* @t2 to i8*), i64 1824, i32 4, i1 false)
24; CHECK-NEXT: ret i8* bitcast (%struct.T1* @t1 to i8*)
25  %ret = call i8* @__memmove_chk(i8* %dst, i8* %src, i64 1824, i64 1824)
26  ret i8* %ret
27}
28
29define i8* @test_simplify2() {
30; CHECK-LABEL: @test_simplify2(
31  %dst = bitcast %struct.T1* @t1 to i8*
32  %src = bitcast %struct.T3* @t3 to i8*
33
34; CHECK-NEXT: call void @llvm.memmove.p0i8.p0i8.i64(i8* bitcast (%struct.T1* @t1 to i8*), i8* bitcast (%struct.T3* @t3 to i8*), i64 1824, i32 4, i1 false)
35; CHECK-NEXT: ret i8* bitcast (%struct.T1* @t1 to i8*)
36  %ret = call i8* @__memmove_chk(i8* %dst, i8* %src, i64 1824, i64 2848)
37  ret i8* %ret
38}
39
40; Check cases where dstlen < len.
41
42define i8* @test_no_simplify1() {
43; CHECK-LABEL: @test_no_simplify1(
44  %dst = bitcast %struct.T3* @t3 to i8*
45  %src = bitcast %struct.T1* @t1 to i8*
46
47; CHECK-NEXT: %ret = call i8* @__memmove_chk(i8* bitcast (%struct.T3* @t3 to i8*), i8* bitcast (%struct.T1* @t1 to i8*), i64 2848, i64 1824)
48; CHECK-NEXT: ret i8* %ret
49  %ret = call i8* @__memmove_chk(i8* %dst, i8* %src, i64 2848, i64 1824)
50  ret i8* %ret
51}
52
53define i8* @test_no_simplify2() {
54; CHECK-LABEL: @test_no_simplify2(
55  %dst = bitcast %struct.T1* @t1 to i8*
56  %src = bitcast %struct.T2* @t2 to i8*
57
58; CHECK-NEXT: %ret = call i8* @__memmove_chk(i8* bitcast (%struct.T1* @t1 to i8*), i8* bitcast (%struct.T2* @t2 to i8*), i64 1024, i64 0)
59; CHECK-NEXT: ret i8* %ret
60  %ret = call i8* @__memmove_chk(i8* %dst, i8* %src, i64 1024, i64 0)
61  ret i8* %ret
62}
63
64declare i8* @__memmove_chk(i8*, i8*, i64, i64)
65