1; RUN: opt < %s -asan -asan-module -S | FileCheck %s
2target 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"
3target triple = "x86_64-unknown-linux-gnu"
4@xxx = global i32 0, align 4
5
6; If a global is present, __asan_[un]register_globals should be called from
7; module ctor/dtor
8
9; CHECK: llvm.global_ctors
10; CHECK: @__asan_gen_ = private constant [8 x i8] c"<stdin>\00", align 1
11; CHECK: llvm.global_dtors
12
13; Test that we don't instrument global arrays with static initializer
14; indexed with constants in-bounds. But instrument all other cases.
15
16@GlobSt = global [10 x i32] zeroinitializer, align 16  ; static initializer
17@GlobDy = global [10 x i32] zeroinitializer, align 16  ; dynamic initializer
18@GlobEx = external global [10 x i32] , align 16        ; extern initializer
19
20; GlobSt is declared here, and has static initializer -- ok to optimize.
21define i32 @AccessGlobSt_0_2() sanitize_address {
22entry:
23    %0 = load i32, i32* getelementptr inbounds ([10 x i32], [10 x i32]* @GlobSt, i64 0, i64 2), align 8
24    ret i32 %0
25; CHECK-LABEL: define i32 @AccessGlobSt_0_2
26; CHECK-NOT: __asan_report
27; CHECK: ret i32 %0
28}
29
30; GlobSt is accessed out of bounds -- can't optimize
31define i32 @AccessGlobSt_0_12() sanitize_address {
32entry:
33    %0 = load i32, i32* getelementptr inbounds ([10 x i32], [10 x i32]* @GlobSt, i64 0, i64 12), align 8
34    ret i32 %0
35; CHECK-LABEL: define i32 @AccessGlobSt_0_12
36; CHECK: __asan_report
37; CHECK: ret i32
38}
39
40; GlobSt is accessed with Gep that has non-0 first index -- can't optimize.
41define i32 @AccessGlobSt_1_2() sanitize_address {
42entry:
43    %0 = load i32, i32* getelementptr inbounds ([10 x i32], [10 x i32]* @GlobSt, i64 1, i64 2), align 8
44    ret i32 %0
45; CHECK-LABEL: define i32 @AccessGlobSt_1_2
46; CHECK: __asan_report
47; CHECK: ret i32
48}
49
50; GlobDy is declared with dynamic initializer -- can't optimize.
51define i32 @AccessGlobDy_0_2() sanitize_address {
52entry:
53    %0 = load i32, i32* getelementptr inbounds ([10 x i32], [10 x i32]* @GlobDy, i64 0, i64 2), align 8
54    ret i32 %0
55; CHECK-LABEL: define i32 @AccessGlobDy_0_2
56; CHECK: __asan_report
57; CHECK: ret i32
58}
59
60; GlobEx is an external global -- can't optimize.
61define i32 @AccessGlobEx_0_2() sanitize_address {
62entry:
63    %0 = load i32, i32* getelementptr inbounds ([10 x i32], [10 x i32]* @GlobEx, i64 0, i64 2), align 8
64    ret i32 %0
65; CHECK-LABEL: define i32 @AccessGlobEx_0_2
66; CHECK: __asan_report
67; CHECK: ret i32
68}
69
70
71!llvm.asan.globals = !{!0}
72!0 = !{[10 x i32]* @GlobDy, null, null, i1 true, i1 false}
73
74; CHECK-LABEL: define internal void @asan.module_ctor
75; CHECK-NOT: ret
76; CHECK: call void @__asan_register_globals
77; CHECK: ret
78
79; CHECK-LABEL: define internal void @asan.module_dtor
80; CHECK-NOT: ret
81; CHECK: call void @__asan_unregister_globals
82; CHECK: ret
83