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Diffstat (limited to 'llvm/test/Transforms/SafeStack/byval.ll')
| -rw-r--r-- | llvm/test/Transforms/SafeStack/byval.ll | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/llvm/test/Transforms/SafeStack/byval.ll b/llvm/test/Transforms/SafeStack/byval.ll new file mode 100644 index 00000000000..f9a06e54d2d --- /dev/null +++ b/llvm/test/Transforms/SafeStack/byval.ll @@ -0,0 +1,51 @@ +; 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* %[[B]], i8* %[[C]], i64 400, i32 8, 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 +} + |
