1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; Test lib call simplification of __memcpy_chk calls with various values
5 ; RUN: opt < %s -instcombine -S | FileCheck %s
7 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"
9 %struct.T1 = type { [100 x i32], [100 x i32], [1024 x i8] }
10 %struct.T2 = type { [100 x i32], [100 x i32], [1024 x i8] }
11 %struct.T3 = type { [100 x i32], [100 x i32], [2048 x i8] }
13 @t1 = common global %struct.T1 zeroinitializer
14 @t2 = common global %struct.T2 zeroinitializer
15 @t3 = common global %struct.T3 zeroinitializer
17 ; Check cases where dstlen >= len.
19 define i8* @test_simplify1() {
20 ; CHECK-LABEL: @test_simplify1(
21 ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 4 dereferenceable(1824) bitcast (%struct.T1* @t1 to i8*), i8* nonnull align 4 dereferenceable(1824) bitcast (%struct.T2* @t2 to i8*), i64 1824, i1 false)
22 ; CHECK-NEXT: ret i8* bitcast (%struct.T1* @t1 to i8*)
24 %dst = bitcast %struct.T1* @t1 to i8*
25 %src = bitcast %struct.T2* @t2 to i8*
26 %ret = call i8* @__memcpy_chk(i8* %dst, i8* %src, i64 1824, i64 1824)
30 define i8* @test_simplify2() {
31 ; CHECK-LABEL: @test_simplify2(
32 ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 4 dereferenceable(1824) bitcast (%struct.T1* @t1 to i8*), i8* nonnull align 4 dereferenceable(1824) bitcast (%struct.T3* @t3 to i8*), i64 1824, i1 false)
33 ; CHECK-NEXT: ret i8* bitcast (%struct.T1* @t1 to i8*)
35 %dst = bitcast %struct.T1* @t1 to i8*
36 %src = bitcast %struct.T3* @t3 to i8*
37 %ret = call i8* @__memcpy_chk(i8* %dst, i8* %src, i64 1824, i64 2848)
41 ; Check cases where dstlen < len.
43 define i8* @test_no_simplify1() {
44 ; CHECK-LABEL: @test_no_simplify1(
45 ; 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)
46 ; CHECK-NEXT: ret i8* [[RET]]
48 %dst = bitcast %struct.T3* @t3 to i8*
49 %src = bitcast %struct.T1* @t1 to i8*
50 %ret = call i8* @__memcpy_chk(i8* %dst, i8* %src, i64 2848, i64 1824)
54 define i8* @test_no_simplify2() {
55 ; CHECK-LABEL: @test_no_simplify2(
56 ; 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)
57 ; CHECK-NEXT: ret i8* [[RET]]
59 %dst = bitcast %struct.T1* @t1 to i8*
60 %src = bitcast %struct.T2* @t2 to i8*
61 %ret = call i8* @__memcpy_chk(i8* %dst, i8* %src, i64 1024, i64 0)
65 define i8* @test_simplify_return_indcall(i8* ()* %alloc) {
66 ; CHECK-LABEL: @test_simplify_return_indcall(
67 ; CHECK-NEXT: [[DST:%.*]] = call i8* [[ALLOC:%.*]]()
68 ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 1 dereferenceable(1824) [[DST]], i8* nonnull align 4 dereferenceable(1824) bitcast (%struct.T2* @t2 to i8*), i64 1824, i1 false)
69 ; CHECK-NEXT: ret i8* [[DST]]
71 %src = bitcast %struct.T2* @t2 to i8*
72 %dst = call i8* %alloc()
73 %ret = call i8* @__memcpy_chk(i8* %dst, i8* %src, i64 1824, i64 1824)
77 declare i8* @__memcpy_chk(i8*, i8*, i64, i64)