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
4target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
5target triple = "x86_64-unknown-linux-gnu"
6
7%struct.S = type { [100 x i32] }
8
9; Safe access to a byval argument.
10define i32 @ByValSafe(%struct.S* byval nocapture readonly align 8 %zzz) norecurse nounwind readonly safestack uwtable {
11entry:
12  ; CHECK-LABEL: @ByValSafe
13  ; CHECK-NOT: __safestack_unsafe_stack_ptr
14  ; CHECK: ret i32
15  %arrayidx = getelementptr inbounds %struct.S, %struct.S* %zzz, i64 0, i32 0, i64 3
16  %0 = load i32, i32* %arrayidx, align 4
17  ret i32 %0
18}
19
20; Unsafe access to a byval argument.
21; Argument is copied to the unsafe stack.
22define i32 @ByValUnsafe(%struct.S* byval nocapture readonly align 8 %zzz, i64 %idx) norecurse nounwind readonly safestack uwtable {
23entry:
24  ; CHECK-LABEL: @ByValUnsafe
25  ; CHECK: %[[A:.*]] = load {{.*}} @__safestack_unsafe_stack_ptr
26  ; CHECK: store {{.*}} @__safestack_unsafe_stack_ptr
27  ; CHECK: %[[B:.*]] = getelementptr i8, i8* %[[A]], i32 -400
28  ; CHECK: %[[C:.*]] = bitcast %struct.S* %zzz to i8*
29  ; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* %[[B]], i8* %[[C]], i64 400, i32 8, i1 false)
30  ; CHECK: ret i32
31  %arrayidx = getelementptr inbounds %struct.S, %struct.S* %zzz, i64 0, i32 0, i64 %idx
32  %0 = load i32, i32* %arrayidx, align 4
33  ret i32 %0
34}
35
36; Highly aligned byval argument.
37define i32 @ByValUnsafeAligned(%struct.S* byval nocapture readonly align 64 %zzz, i64 %idx) norecurse nounwind readonly safestack uwtable {
38entry:
39  ; CHECK-LABEL: @ByValUnsafeAligned
40  ; CHECK: %[[A:.*]] = load {{.*}} @__safestack_unsafe_stack_ptr
41  ; CHECK: %[[B:.*]] = ptrtoint i8* %[[A]] to i64
42  ; CHECK: and i64 %[[B]], -64
43  ; CHECK: ret i32
44  %arrayidx = getelementptr inbounds %struct.S, %struct.S* %zzz, i64 0, i32 0, i64 0
45  %0 = load i32, i32* %arrayidx, align 64
46  %arrayidx2 = getelementptr inbounds %struct.S, %struct.S* %zzz, i64 0, i32 0, i64 %idx
47  %1 = load i32, i32* %arrayidx2, align 4
48  %add = add nsw i32 %1, %0
49  ret i32 %add
50}
51
52