1 ; Test lib call simplification of __memcpy_chk calls with various values
4 ; RUN: opt < %s -instcombine -S | FileCheck %s
6 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"
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] }
12 @t1 = common global %struct.T1 zeroinitializer
13 @t2 = common global %struct.T2 zeroinitializer
14 @t3 = common global %struct.T3 zeroinitializer
16 ; Check cases where dstlen >= len.
18 define i8* @test_simplify1() {
19 ; CHECK-LABEL: @test_simplify1(
20 %dst = bitcast %struct.T1* @t1 to i8*
21 %src = bitcast %struct.T2* @t2 to i8*
23 ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 bitcast (%struct.T1* @t1 to i8*), i8* align 4 bitcast (%struct.T2* @t2 to i8*), i64 1824, i1 false)
24 ; CHECK-NEXT: ret i8* bitcast (%struct.T1* @t1 to i8*)
25 %ret = call i8* @__memcpy_chk(i8* %dst, i8* %src, i64 1824, i64 1824)
29 define i8* @test_simplify2() {
30 ; CHECK-LABEL: @test_simplify2(
31 %dst = bitcast %struct.T1* @t1 to i8*
32 %src = bitcast %struct.T3* @t3 to i8*
34 ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 bitcast (%struct.T1* @t1 to i8*), i8* align 4 bitcast (%struct.T3* @t3 to i8*), i64 1824, i1 false)
35 ; CHECK-NEXT: ret i8* bitcast (%struct.T1* @t1 to i8*)
36 %ret = call i8* @__memcpy_chk(i8* %dst, i8* %src, i64 1824, i64 2848)
40 ; Check cases where dstlen < len.
42 define 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*
47 ; CHECK-NEXT: %ret = call i8* @__memcpy_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* @__memcpy_chk(i8* %dst, i8* %src, i64 2848, i64 1824)
53 define 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*
58 ; CHECK-NEXT: %ret = call i8* @__memcpy_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* @__memcpy_chk(i8* %dst, i8* %src, i64 1024, i64 0)
64 define i8* @test_simplify_return_indcall(i8* ()* %alloc) {
65 ; CHECK-LABEL: @test_simplify_return_indcall(
66 %src = bitcast %struct.T2* @t2 to i8*
68 ; CHECK-NEXT: %dst = call i8* %alloc()
69 %dst = call i8* %alloc()
71 ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64
72 %ret = call i8* @__memcpy_chk(i8* %dst, i8* %src, i64 1824, i64 1824)
73 ; CHECK-NEXT: ret i8* %dst
77 declare i8* @__memcpy_chk(i8*, i8*, i64, i64)