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gerrit-public.fairphone.software / toolchain / llvm-project / c1a2977fb24a799a11f3586cfd45d39f300ae002 / . / llvm / test / Transforms / InstCombine / memcpy_chk-1.ll
blob: ddaaf82a8e2d32402593943f6f4a6bc82a9a90eb [file] [log] [blame]
Meador Inge0d402f02012-09-27 21:21:21 +0000[diff] [blame]1; Test lib call simplification of __memcpy_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
Ahmed Bougacha1ac93562015-01-27 21:52:16 +0000[diff] [blame]18define i8* @test_simplify1() {
Stephen Linc1c7a132013-07-14 01:42:54 +0000[diff] [blame]19; CHECK-LABEL: @test_simplify1(
Meador Inge0d402f02012-09-27 21:21:21 +0000[diff] [blame]20 %dst = bitcast %struct.T1* @t1 to i8*
21 %src = bitcast %struct.T2* @t2 to i8*
22
Ahmed Bougacha1ac93562015-01-27 21:52:16 +0000[diff] [blame]23; CHECK-NEXT: call void @llvm.memcpy.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* @__memcpy_chk(i8* %dst, i8* %src, i64 1824, i64 1824)
26 ret i8* %ret
Meador Inge0d402f02012-09-27 21:21:21 +0000[diff] [blame]27}
28
Ahmed Bougacha1ac93562015-01-27 21:52:16 +0000[diff] [blame]29define i8* @test_simplify2() {
Stephen Linc1c7a132013-07-14 01:42:54 +0000[diff] [blame]30; CHECK-LABEL: @test_simplify2(
Meador Inge0d402f02012-09-27 21:21:21 +0000[diff] [blame]31 %dst = bitcast %struct.T1* @t1 to i8*
32 %src = bitcast %struct.T3* @t3 to i8*
33
Ahmed Bougacha1ac93562015-01-27 21:52:16 +0000[diff] [blame]34; CHECK-NEXT: call void @llvm.memcpy.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* @__memcpy_chk(i8* %dst, i8* %src, i64 1824, i64 2848)
37 ret i8* %ret
Meador Inge0d402f02012-09-27 21:21:21 +0000[diff] [blame]38}
39
40; Check cases where dstlen < len.
41
Ahmed Bougacha1ac93562015-01-27 21:52:16 +0000[diff] [blame]42define i8* @test_no_simplify1() {
Stephen Linc1c7a132013-07-14 01:42:54 +0000[diff] [blame]43; CHECK-LABEL: @test_no_simplify1(
Meador Inge0d402f02012-09-27 21:21:21 +0000[diff] [blame]44 %dst = bitcast %struct.T3* @t3 to i8*
45 %src = bitcast %struct.T1* @t1 to i8*
46
Ahmed Bougacha1ac93562015-01-27 21:52:16 +0000[diff] [blame]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)
50 ret i8* %ret
Meador Inge0d402f02012-09-27 21:21:21 +0000[diff] [blame]51}
52
Ahmed Bougacha1ac93562015-01-27 21:52:16 +0000[diff] [blame]53define i8* @test_no_simplify2() {
Stephen Linc1c7a132013-07-14 01:42:54 +0000[diff] [blame]54; CHECK-LABEL: @test_no_simplify2(
Meador Inge0d402f02012-09-27 21:21:21 +0000[diff] [blame]55 %dst = bitcast %struct.T1* @t1 to i8*
56 %src = bitcast %struct.T2* @t2 to i8*
57
Ahmed Bougacha1ac93562015-01-27 21:52:16 +0000[diff] [blame]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)
61 ret i8* %ret
Meador Inge0d402f02012-09-27 21:21:21 +0000[diff] [blame]62}
63
Ahmed Bougacha71d7b182015-01-14 00:55:05 +0000[diff] [blame]64define i8* @test_simplify_return_indcall(i8* ()* %alloc) {
65; CHECK-LABEL: @test_simplify_return_indcall(
66 %src = bitcast %struct.T2* @t2 to i8*
67
68; CHECK-NEXT: %dst = call i8* %alloc()
69 %dst = call i8* %alloc()
70
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
74 ret i8* %ret
75}
76
Meador Inge0d402f02012-09-27 21:21:21 +0000[diff] [blame]77declare i8* @__memcpy_chk(i8*, i8*, i64, i64)