30 lines
912 B
LLVM
30 lines
912 B
LLVM
; RUN: opt -safe-stack -S -mtriple=x86_64-unknown < %s -o - | FileCheck %s
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define void @foo() safestack sspreq {
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entry:
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; CHECK: %[[USP:.*]] = load ptr, ptr @__safestack_unsafe_stack_ptr
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; CHECK: %[[USST:.*]] = getelementptr i8, ptr %[[USP]], i32 -16
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; CHECK: store ptr %[[USST]], ptr @__safestack_unsafe_stack_ptr
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; CHECK: %[[A:.*]] = getelementptr i8, ptr %[[USP]], i32 -8
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; CHECK: %[[StackGuard:.*]] = call ptr @llvm.stackguard()
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; CHECK: store ptr %[[StackGuard]], ptr %[[A]]
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%a = alloca i8, align 1
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; CHECK: call void @Capture
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call void @Capture(ptr %a)
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; CHECK: %[[B:.*]] = load ptr, ptr %[[A]]
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; CHECK: %[[COND:.*]] = icmp ne ptr %[[StackGuard]], %[[B]]
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; CHECK: br i1 %[[COND]], {{.*}} !prof
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; CHECK: call void @__stack_chk_fail()
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; CHECK-NEXT: unreachable
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; CHECK: store ptr %[[USP]], ptr @__safestack_unsafe_stack_ptr
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; CHECK-NEXT: ret void
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ret void
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}
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declare void @Capture(ptr)
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