derek.holloway
7502bf64a4
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67 lines
2.9 KiB
LLVM
67 lines
2.9 KiB
LLVM
; RUN: opt -safe-stack -S -mtriple=i386-pc-linux-gnu < %s -o - | FileCheck %s
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; RUN: opt -safe-stack -S -mtriple=x86_64-pc-linux-gnu < %s -o - | FileCheck %s
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; RUN: opt -passes='require<libcall-lowering-info>,safe-stack' -S -mtriple=i386-pc-linux-gnu < %s -o - | FileCheck %s
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; RUN: opt -passes='require<libcall-lowering-info>,safe-stack' -S -mtriple=x86_64-pc-linux-gnu < %s -o - | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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%struct.S = type { [100 x i32] }
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; Safe access to a byval argument.
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define i32 @ByValSafe(ptr byval(%struct.S) nocapture readonly align 8 %zzz) norecurse nounwind readonly safestack uwtable {
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entry:
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; CHECK-LABEL: @ByValSafe
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; CHECK-NOT: __safestack_unsafe_stack_ptr
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; CHECK: ret i32
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%arrayidx = getelementptr inbounds %struct.S, ptr %zzz, i64 0, i32 0, i64 3
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%0 = load i32, ptr %arrayidx, align 4
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ret i32 %0
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}
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; Unsafe access to a byval argument.
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; Argument is copied to the unsafe stack.
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define i32 @ByValUnsafe(ptr byval(%struct.S) nocapture readonly align 8 %zzz, i64 %idx) norecurse nounwind readonly safestack uwtable {
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entry:
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; CHECK-LABEL: @ByValUnsafe
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; CHECK: %[[A:.*]] = load {{.*}} @__safestack_unsafe_stack_ptr
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; CHECK: store {{.*}} @__safestack_unsafe_stack_ptr
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; CHECK: %[[B:.*]] = getelementptr i8, ptr %[[A]], i32 -400
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; CHECK: call void @llvm.memcpy.p0.p0.i64(ptr align 8 %[[B]], ptr align 8 %zzz, i64 400, i1 false)
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; CHECK: ret i32
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%arrayidx = getelementptr inbounds %struct.S, ptr %zzz, i64 0, i32 0, i64 %idx
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%0 = load i32, ptr %arrayidx, align 4
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ret i32 %0
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}
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; Unsafe access to a byval argument.
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; Argument is copied to the unsafe stack.
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; Check that dest align of memcpy is set according to datalayout prefered alignment
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define i32 @ByValUnsafe2(ptr byval(%struct.S) nocapture readonly %zzz, i64 %idx) norecurse nounwind readonly safestack uwtable {
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entry:
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; CHECK-LABEL: @ByValUnsafe
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; CHECK: %[[A:.*]] = load {{.*}} @__safestack_unsafe_stack_ptr
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; CHECK: store {{.*}} @__safestack_unsafe_stack_ptr
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; CHECK: %[[B:.*]] = getelementptr i8, ptr %[[A]], i32 -400
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; CHECK: call void @llvm.memcpy.p0.p0.i64(ptr align 8 %[[B]], ptr %zzz, i64 400, i1 false)
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; CHECK: ret i32
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%arrayidx = getelementptr inbounds %struct.S, ptr %zzz, i64 0, i32 0, i64 %idx
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%0 = load i32, ptr %arrayidx, align 4
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ret i32 %0
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}
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; Highly aligned byval argument.
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define i32 @ByValUnsafeAligned(ptr byval(%struct.S) nocapture readonly align 64 %zzz, i64 %idx) norecurse nounwind readonly safestack uwtable {
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entry:
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; CHECK-LABEL: @ByValUnsafeAligned
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; CHECK: %[[A:.*]] = load {{.*}} @__safestack_unsafe_stack_ptr
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; CHECK: call ptr @llvm.ptrmask.p0.i64(ptr %[[A]], i64 -64)
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; CHECK: ret i32
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%0 = load i32, ptr %zzz, align 64
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%arrayidx2 = getelementptr inbounds %struct.S, ptr %zzz, i64 0, i32 0, i64 %idx
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%1 = load i32, ptr %arrayidx2, align 4
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%add = add nsw i32 %1, %0
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ret i32 %add
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}
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