1 ; RUN: opt -safe-stack -S -mtriple=i386-pc-linux-gnu < %s -o - | FileCheck %s
2 ; RUN: opt -safe-stack -S -mtriple=x86_64-pc-linux-gnu < %s -o - | FileCheck %s
7 define void @foo(i8* %a) nounwind uwtable safestack {
9 ; CHECK: %[[USP:.*]] = load i8*, i8** @__safestack_unsafe_stack_ptr
11 ; CHECK: %[[USST:.*]] = getelementptr i8, i8* %[[USP]], i32 -16
13 ; CHECK: store i8* %[[USST]], i8** @__safestack_unsafe_stack_ptr
15 ; CHECK: %[[AADDR:.*]] = alloca i8*, align 8
16 %a.addr = alloca i8*, align 8
18 ; CHECK: %[[BUFPTR:.*]] = getelementptr i8, i8* %[[USP]], i32 -4
19 ; CHECK: %[[BUFPTR2:.*]] = bitcast i8* %[[BUFPTR]] to [4 x i8]*
20 %buf = alloca [4 x i8], align 1
22 ; CHECK: store i8* {{.*}}, i8** %[[AADDR]], align 8
23 store i8* %a, i8** %a.addr, align 8
25 ; CHECK: %[[GEP:.*]] = getelementptr inbounds [4 x i8], [4 x i8]* %[[BUFPTR2]], i32 0, i32 0
26 %gep = getelementptr inbounds [4 x i8], [4 x i8]* %buf, i32 0, i32 0
28 ; CHECK: %[[A2:.*]] = load i8*, i8** %[[AADDR]], align 8
29 %a2 = load i8*, i8** %a.addr, align 8
31 ; CHECK: call i8* @strcpy(i8* %[[GEP]], i8* %[[A2]])
32 %call = call i8* @strcpy(i8* %gep, i8* %a2)
34 ; CHECK: store i8* %[[USP]], i8** @__safestack_unsafe_stack_ptr
38 ; Load from an array at a fixed offset, no overflow.
39 define i8 @StaticArrayFixedSafe() nounwind uwtable safestack {
41 ; CHECK-LABEL: define i8 @StaticArrayFixedSafe(
42 ; CHECK-NOT: __safestack_unsafe_stack_ptr
44 %buf = alloca i8, i32 4, align 1
45 %gep = getelementptr inbounds i8, i8* %buf, i32 2
46 %x = load i8, i8* %gep, align 1
50 ; Load from an array at a fixed offset with overflow.
51 define i8 @StaticArrayFixedUnsafe() nounwind uwtable safestack {
53 ; CHECK-LABEL: define i8 @StaticArrayFixedUnsafe(
54 ; CHECK: __safestack_unsafe_stack_ptr
56 %buf = alloca i8, i32 4, align 1
57 %gep = getelementptr inbounds i8, i8* %buf, i32 5
58 %x = load i8, i8* %gep, align 1
62 ; Load from an array at an unknown offset.
63 define i8 @StaticArrayVariableUnsafe(i32 %ofs) nounwind uwtable safestack {
65 ; CHECK-LABEL: define i8 @StaticArrayVariableUnsafe(
66 ; CHECK: __safestack_unsafe_stack_ptr
68 %buf = alloca i8, i32 4, align 1
69 %gep = getelementptr inbounds i8, i8* %buf, i32 %ofs
70 %x = load i8, i8* %gep, align 1
74 ; Load from an array of an unknown size.
75 define i8 @DynamicArrayUnsafe(i32 %sz) nounwind uwtable safestack {
77 ; CHECK-LABEL: define i8 @DynamicArrayUnsafe(
78 ; CHECK: __safestack_unsafe_stack_ptr
80 %buf = alloca i8, i32 %sz, align 1
81 %gep = getelementptr inbounds i8, i8* %buf, i32 2
82 %x = load i8, i8* %gep, align 1
86 declare i8* @strcpy(i8*, i8*)