xref: /llvm-project/llvm/test/Transforms/SafeStack/X86/setjmp.ll (revision 3bd517205799a152689434ceddf9493765f1e883)
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
3; RUN: opt -passes=safe-stack -S -mtriple=i386-pc-linux-gnu < %s -o - | FileCheck %s
4; RUN: opt -passes=safe-stack -S -mtriple=x86_64-pc-linux-gnu < %s -o - | FileCheck %s
5
6%struct.__jmp_buf_tag = type { [8 x i64], i32, %struct.__sigset_t }
7%struct.__sigset_t = type { [16 x i64] }
8
9@.str = private unnamed_addr constant [4 x i8] c"%s\0A\00", align 1
10@buf = internal global [1 x %struct.__jmp_buf_tag] zeroinitializer, align 16
11
12; setjmp/longjmp test.
13; Requires protector.
14define i32 @foo() nounwind uwtable safestack {
15entry:
16  ; CHECK: %[[SP:.*]] = load ptr, ptr @__safestack_unsafe_stack_ptr
17  ; CHECK: %[[STATICTOP:.*]] = getelementptr i8, ptr %[[SP]], i32 -16
18  %retval = alloca i32, align 4
19  %x = alloca i32, align 4
20  store i32 0, ptr %retval
21  store i32 42, ptr %x, align 4
22  %call = call i32 @_setjmp(ptr @buf) returns_twice
23  ; CHECK: setjmp
24  ; CHECK-NEXT: store ptr %[[STATICTOP]], ptr @__safestack_unsafe_stack_ptr
25  %tobool = icmp ne i32 %call, 0
26  br i1 %tobool, label %if.else, label %if.then
27if.then:                                          ; preds = %entry
28  call void @funcall(ptr %x)
29  br label %if.end
30if.else:                                          ; preds = %entry
31  call i32 (...) @dummy()
32  br label %if.end
33if.end:                                           ; preds = %if.else, %if.then
34  ret i32 0
35}
36
37declare i32 @_setjmp(ptr)
38declare void @funcall(ptr)
39declare i32 @dummy(...)
40