forked from OSchip/llvm-project
43 lines
1.4 KiB
LLVM
43 lines
1.4 KiB
LLVM
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; RUN: opt < %s -asan -asan-module -asan-stack-dynamic-alloca \
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; RUN: -asan-use-after-return -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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define void @Func1() sanitize_address {
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entry:
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; CHECK-LABEL: Func1
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; CHECK: entry:
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; CHECK: load i32* @__asan_option_detect_stack_use_after_return
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; CHECK: <label>:[[UAR_ENABLED_BB:[0-9]+]]
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; CHECK: [[FAKE_STACK_RT:%[0-9]+]] = call i64 @__asan_stack_malloc_
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; CHECK: <label>:[[FAKE_STACK_BB:[0-9]+]]
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; CHECK: [[FAKE_STACK:%[0-9]+]] = phi i64 [ 0, %entry ], [ [[FAKE_STACK_RT]], %[[UAR_ENABLED_BB]] ]
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; CHECK: icmp eq i64 [[FAKE_STACK]], 0
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; CHECK: <label>:[[NO_FAKE_STACK_BB:[0-9]+]]
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; CHECK: %MyAlloca = alloca i8, i64
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; CHECK: [[ALLOCA:%[0-9]+]] = ptrtoint i8* %MyAlloca
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; CHECK: phi i64 [ [[FAKE_STACK]], %[[FAKE_STACK_BB]] ], [ [[ALLOCA]], %[[NO_FAKE_STACK_BB]] ]
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; CHECK: ret void
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%XXX = alloca [20 x i8], align 1
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ret void
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}
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; Test that dynamic alloca is not used for functions with inline assembly.
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define void @Func2() sanitize_address {
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entry:
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; CHECK-LABEL: Func2
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; CHECK: alloca [96 x i8]
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; CHECK: ret void
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%XXX = alloca [20 x i8], align 1
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call void asm sideeffect "mov %%rbx, %%rcx", "~{dirflag},~{fpsr},~{flags}"() nounwind
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ret void
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}
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