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
6 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
7 target triple = "x86_64-unknown-linux-gnu"
9 %struct.S = type { [100 x i32] }
11 ; Safe access to a byval argument.
12 define i32 @ByValSafe(ptr byval(%struct.S) nocapture readonly align 8 %zzz) norecurse nounwind readonly safestack uwtable {
14 ; CHECK-LABEL: @ByValSafe
15 ; CHECK-NOT: __safestack_unsafe_stack_ptr
17 %arrayidx = getelementptr inbounds %struct.S, ptr %zzz, i64 0, i32 0, i64 3
18 %0 = load i32, ptr %arrayidx, align 4
22 ; Unsafe access to a byval argument.
23 ; Argument is copied to the unsafe stack.
24 define i32 @ByValUnsafe(ptr byval(%struct.S) nocapture readonly align 8 %zzz, i64 %idx) norecurse nounwind readonly safestack uwtable {
26 ; CHECK-LABEL: @ByValUnsafe
27 ; CHECK: %[[A:.*]] = load {{.*}} @__safestack_unsafe_stack_ptr
28 ; CHECK: store {{.*}} @__safestack_unsafe_stack_ptr
29 ; CHECK: %[[B:.*]] = getelementptr i8, ptr %[[A]], i32 -400
30 ; CHECK: call void @llvm.memcpy.p0.p0.i64(ptr align 8 %[[B]], ptr align 8 %zzz, i64 400, i1 false)
32 %arrayidx = getelementptr inbounds %struct.S, ptr %zzz, i64 0, i32 0, i64 %idx
33 %0 = load i32, ptr %arrayidx, align 4
37 ; Unsafe access to a byval argument.
38 ; Argument is copied to the unsafe stack.
39 ; Check that dest align of memcpy is set according to datalayout prefered alignment
40 define i32 @ByValUnsafe2(ptr byval(%struct.S) nocapture readonly %zzz, i64 %idx) norecurse nounwind readonly safestack uwtable {
42 ; CHECK-LABEL: @ByValUnsafe
43 ; CHECK: %[[A:.*]] = load {{.*}} @__safestack_unsafe_stack_ptr
44 ; CHECK: store {{.*}} @__safestack_unsafe_stack_ptr
45 ; CHECK: %[[B:.*]] = getelementptr i8, ptr %[[A]], i32 -400
46 ; CHECK: call void @llvm.memcpy.p0.p0.i64(ptr align 8 %[[B]], ptr %zzz, i64 400, i1 false)
48 %arrayidx = getelementptr inbounds %struct.S, ptr %zzz, i64 0, i32 0, i64 %idx
49 %0 = load i32, ptr %arrayidx, align 4
53 ; Highly aligned byval argument.
54 define i32 @ByValUnsafeAligned(ptr byval(%struct.S) nocapture readonly align 64 %zzz, i64 %idx) norecurse nounwind readonly safestack uwtable {
56 ; CHECK-LABEL: @ByValUnsafeAligned
57 ; CHECK: %[[A:.*]] = load {{.*}} @__safestack_unsafe_stack_ptr
58 ; CHECK: %[[B:.*]] = ptrtoint ptr %[[A]] to i64
59 ; CHECK: and i64 %[[B]], -64
61 %0 = load i32, ptr %zzz, align 64
62 %arrayidx2 = getelementptr inbounds %struct.S, ptr %zzz, i64 0, i32 0, i64 %idx
63 %1 = load i32, ptr %arrayidx2, align 4
64 %add = add nsw i32 %1, %0