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
4 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
5 target triple = "x86_64-unknown-linux-gnu"
7 %struct.S = type { [100 x i32] }
9 ; Safe access to a byval argument.
10 define i32 @ByValSafe(ptr byval(%struct.S) nocapture readonly align 8 %zzz) norecurse nounwind readonly safestack uwtable {
12 ; CHECK-LABEL: @ByValSafe
13 ; CHECK-NOT: __safestack_unsafe_stack_ptr
15 %arrayidx = getelementptr inbounds %struct.S, ptr %zzz, i64 0, i32 0, i64 3
16 %0 = load i32, ptr %arrayidx, align 4
20 ; Unsafe access to a byval argument.
21 ; Argument is copied to the unsafe stack.
22 define i32 @ByValUnsafe(ptr byval(%struct.S) nocapture readonly align 8 %zzz, i64 %idx) norecurse nounwind readonly safestack uwtable {
24 ; CHECK-LABEL: @ByValUnsafe
25 ; CHECK: %[[A:.*]] = load {{.*}} @__safestack_unsafe_stack_ptr
26 ; CHECK: store {{.*}} @__safestack_unsafe_stack_ptr
27 ; CHECK: %[[B:.*]] = getelementptr i8, ptr %[[A]], i32 -400
28 ; CHECK: call void @llvm.memcpy.p0.p0.i64(ptr align 8 %[[B]], ptr align 8 %zzz, i64 400, i1 false)
30 %arrayidx = getelementptr inbounds %struct.S, ptr %zzz, i64 0, i32 0, i64 %idx
31 %0 = load i32, ptr %arrayidx, align 4
35 ; Unsafe access to a byval argument.
36 ; Argument is copied to the unsafe stack.
37 ; Check that dest align of memcpy is set according to datalayout prefered alignment
38 define i32 @ByValUnsafe2(ptr byval(%struct.S) nocapture readonly %zzz, i64 %idx) norecurse nounwind readonly safestack uwtable {
40 ; CHECK-LABEL: @ByValUnsafe
41 ; CHECK: %[[A:.*]] = load {{.*}} @__safestack_unsafe_stack_ptr
42 ; CHECK: store {{.*}} @__safestack_unsafe_stack_ptr
43 ; CHECK: %[[B:.*]] = getelementptr i8, ptr %[[A]], i32 -400
44 ; CHECK: call void @llvm.memcpy.p0.p0.i64(ptr align 8 %[[B]], ptr %zzz, i64 400, i1 false)
46 %arrayidx = getelementptr inbounds %struct.S, ptr %zzz, i64 0, i32 0, i64 %idx
47 %0 = load i32, ptr %arrayidx, align 4
51 ; Highly aligned byval argument.
52 define i32 @ByValUnsafeAligned(ptr byval(%struct.S) nocapture readonly align 64 %zzz, i64 %idx) norecurse nounwind readonly safestack uwtable {
54 ; CHECK-LABEL: @ByValUnsafeAligned
55 ; CHECK: %[[A:.*]] = load {{.*}} @__safestack_unsafe_stack_ptr
56 ; CHECK: %[[B:.*]] = ptrtoint ptr %[[A]] to i64
57 ; CHECK: and i64 %[[B]], -64
59 %0 = load i32, ptr %zzz, align 64
60 %arrayidx2 = getelementptr inbounds %struct.S, ptr %zzz, i64 0, i32 0, i64 %idx
61 %1 = load i32, ptr %arrayidx2, align 4
62 %add = add nsw i32 %1, %0