| ; RUN: opt -safe-stack -S -mtriple=i386-pc-linux-gnu < %s -o - | FileCheck %s |
| ; RUN: opt -safe-stack -S -mtriple=x86_64-pc-linux-gnu < %s -o - | FileCheck %s |
| |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| %struct.S = type { [100 x i32] } |
| |
| ; Safe access to a byval argument. |
| define i32 @ByValSafe(%struct.S* byval nocapture readonly align 8 %zzz) norecurse nounwind readonly safestack uwtable { |
| entry: |
| ; CHECK-LABEL: @ByValSafe |
| ; CHECK-NOT: __safestack_unsafe_stack_ptr |
| ; CHECK: ret i32 |
| %arrayidx = getelementptr inbounds %struct.S, %struct.S* %zzz, i64 0, i32 0, i64 3 |
| %0 = load i32, i32* %arrayidx, align 4 |
| ret i32 %0 |
| } |
| |
| ; Unsafe access to a byval argument. |
| ; Argument is copied to the unsafe stack. |
| define i32 @ByValUnsafe(%struct.S* byval nocapture readonly align 8 %zzz, i64 %idx) norecurse nounwind readonly safestack uwtable { |
| entry: |
| ; CHECK-LABEL: @ByValUnsafe |
| ; CHECK: %[[A:.*]] = load {{.*}} @__safestack_unsafe_stack_ptr |
| ; CHECK: store {{.*}} @__safestack_unsafe_stack_ptr |
| ; CHECK: %[[B:.*]] = getelementptr i8, i8* %[[A]], i32 -400 |
| ; CHECK: %[[C:.*]] = bitcast %struct.S* %zzz to i8* |
| ; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %[[B]], i8* align 8 %[[C]], i64 400, i1 false) |
| ; CHECK: ret i32 |
| %arrayidx = getelementptr inbounds %struct.S, %struct.S* %zzz, i64 0, i32 0, i64 %idx |
| %0 = load i32, i32* %arrayidx, align 4 |
| ret i32 %0 |
| } |
| |
| ; Unsafe access to a byval argument. |
| ; Argument is copied to the unsafe stack. |
| ; Check that dest align of memcpy is set according to datalayout prefered alignment |
| define i32 @ByValUnsafe2(%struct.S* byval nocapture readonly %zzz, i64 %idx) norecurse nounwind readonly safestack uwtable { |
| entry: |
| ; CHECK-LABEL: @ByValUnsafe |
| ; CHECK: %[[A:.*]] = load {{.*}} @__safestack_unsafe_stack_ptr |
| ; CHECK: store {{.*}} @__safestack_unsafe_stack_ptr |
| ; CHECK: %[[B:.*]] = getelementptr i8, i8* %[[A]], i32 -400 |
| ; CHECK: %[[C:.*]] = bitcast %struct.S* %zzz to i8* |
| ; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %[[B]], i8* %[[C]], i64 400, i1 false) |
| ; CHECK: ret i32 |
| %arrayidx = getelementptr inbounds %struct.S, %struct.S* %zzz, i64 0, i32 0, i64 %idx |
| %0 = load i32, i32* %arrayidx, align 4 |
| ret i32 %0 |
| } |
| |
| ; Highly aligned byval argument. |
| define i32 @ByValUnsafeAligned(%struct.S* byval nocapture readonly align 64 %zzz, i64 %idx) norecurse nounwind readonly safestack uwtable { |
| entry: |
| ; CHECK-LABEL: @ByValUnsafeAligned |
| ; CHECK: %[[A:.*]] = load {{.*}} @__safestack_unsafe_stack_ptr |
| ; CHECK: %[[B:.*]] = ptrtoint i8* %[[A]] to i64 |
| ; CHECK: and i64 %[[B]], -64 |
| ; CHECK: ret i32 |
| %arrayidx = getelementptr inbounds %struct.S, %struct.S* %zzz, i64 0, i32 0, i64 0 |
| %0 = load i32, i32* %arrayidx, align 64 |
| %arrayidx2 = getelementptr inbounds %struct.S, %struct.S* %zzz, i64 0, i32 0, i64 %idx |
| %1 = load i32, i32* %arrayidx2, align 4 |
| %add = add nsw i32 %1, %0 |
| ret i32 %add |
| } |
| |