xref: /llvm-project/llvm/test/Transforms/SafeStack/X86/ssp.ll (revision 3bd517205799a152689434ceddf9493765f1e883) 
1; RUN: opt -safe-stack -S -mtriple=x86_64-unknown < %s -o - | FileCheck %s
2; RUN: opt -passes=safe-stack -S -mtriple=x86_64-unknown < %s -o - | FileCheck %s
3
4define void @foo() safestack sspreq {
5entry:
6; CHECK: %[[USP:.*]] = load ptr, ptr @__safestack_unsafe_stack_ptr
7; CHECK: %[[USST:.*]] = getelementptr i8, ptr %[[USP]], i32 -16
8; CHECK: store ptr %[[USST]], ptr @__safestack_unsafe_stack_ptr
9
10; CHECK: %[[A:.*]] = getelementptr i8, ptr %[[USP]], i32 -8
11; CHECK: %[[StackGuard:.*]] = call ptr @llvm.stackguard()
12; CHECK: store ptr %[[StackGuard]], ptr %[[A]]
13  %a = alloca i8, align 1
14
15; CHECK: call void @Capture
16  call void @Capture(ptr %a)
17
18; CHECK: %[[B:.*]] = load ptr, ptr %[[A]]
19; CHECK: %[[COND:.*]] = icmp ne ptr %[[StackGuard]], %[[B]]
20; CHECK: br i1 %[[COND]], {{.*}} !prof
21
22; CHECK:      call void @__stack_chk_fail()
23; CHECK-NEXT: unreachable
24
25; CHECK:      store ptr %[[USP]], ptr @__safestack_unsafe_stack_ptr
26; CHECK-NEXT: ret void
27  ret void
28}
29
30declare void @Capture(ptr)
31