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https://github.com/c64scene-ar/llvm-6502.git
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62 lines
2.4 KiB
LLVM
62 lines
2.4 KiB
LLVM
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; Test hanlding of llvm.lifetime intrinsics.
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; RUN: opt < %s -asan -asan-check-lifetime -S | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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declare void @llvm.lifetime.start(i64, i8* nocapture) nounwind
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declare void @llvm.lifetime.end(i64, i8* nocapture) nounwind
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define void @lifetime_no_size() address_safety {
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entry:
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%i = alloca i32, align 4
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%i.ptr = bitcast i32* %i to i8*
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call void @llvm.lifetime.start(i64 -1, i8* %i.ptr)
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call void @llvm.lifetime.end(i64 -1, i8* %i.ptr)
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; Check that lifetime with no size are ignored.
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; CHECK: @lifetime_no_size
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; CHECK-NOT: @__asan_poison_stack_memory
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; CHECK-NOT: @__asan_unpoison_stack_memory
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; CHECK: ret void
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ret void
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}
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; Generic case of lifetime analysis.
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define void @lifetime() address_safety {
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; CHECK: @lifetime
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; Regular variable lifetime intrinsics.
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%i = alloca i32, align 4
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%i.ptr = bitcast i32* %i to i8*
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call void @llvm.lifetime.start(i64 3, i8* %i.ptr)
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; Memory is unpoisoned at llvm.lifetime.start
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; CHECK: %[[VAR:[^ ]*]] = ptrtoint i8* %i.ptr to i64
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; CHECK-NEXT: call void @__asan_unpoison_stack_memory(i64 %[[VAR]], i64 3)
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call void @llvm.lifetime.end(i64 4, i8* %i.ptr)
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call void @llvm.lifetime.end(i64 2, i8* %i.ptr)
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; Memory is poisoned at every call to llvm.lifetime.end
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; CHECK: call void @__asan_poison_stack_memory(i64 %{{[^ ]+}}, i64 4)
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; CHECK: call void @__asan_poison_stack_memory(i64 %{{[^ ]+}}, i64 2)
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; Lifetime intrinsics for array.
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%arr = alloca [10 x i32], align 16
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%arr.ptr = bitcast [10 x i32]* %arr to i8*
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call void @llvm.lifetime.start(i64 40, i8* %arr.ptr)
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; CHECK: call void @__asan_unpoison_stack_memory(i64 %{{[^ ]+}}, i64 40)
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call void @llvm.lifetime.end(i64 40, i8* %arr.ptr)
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; CHECK: call void @__asan_poison_stack_memory(i64 %{{[^ ]+}}, i64 40)
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; One more lifetime start/end for the same variable %i.
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call void @llvm.lifetime.start(i64 4, i8* %i.ptr)
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; CHECK: call void @__asan_unpoison_stack_memory(i64 %{{[^ ]+}}, i64 4)
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call void @llvm.lifetime.end(i64 4, i8* %i.ptr)
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; CHECK: call void @__asan_poison_stack_memory(i64 %{{[^ ]+}}, i64 4)
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; Memory is unpoisoned at function exit (only once).
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; CHECK: call void @__asan_unpoison_stack_memory(i64 %{{[^ ]+}}, i64 {{.*}})
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; CHECK-NOT: @__asan_unpoison_stack_memory
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; CHECK: ret void
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ret void
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}
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