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f1366c5524
DFSan changes the ABI of each function in the module. This makes it possible for a function with the native ABI to be called with the instrumented ABI, or vice versa, thus possibly invoking undefined behavior. A simple way of statically detecting instances of this problem is to prepend the prefix "dfs$" to the name of each instrumented-ABI function. This will not catch every such problem; in particular function pointers passed across the instrumented-native barrier cannot be used on the other side. These problems could potentially be caught dynamically. Differential Revision: http://llvm-reviews.chandlerc.com/D1373 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189052 91177308-0d34-0410-b5e6-96231b3b80d8
31 lines
670 B
LLVM
31 lines
670 B
LLVM
; RUN: opt < %s -dfsan -verify -dfsan-args-abi -S | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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; CHECK-LABEL: @"dfs$unreachable_bb1"
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define i8 @unreachable_bb1() {
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; CHECK: ret { i8, i16 } { i8 1, i16 0 }
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; CHECK-NOT: bb2:
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; CHECK-NOT: bb3:
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; CHECK-NOT: bb4:
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ret i8 1
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bb2:
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ret i8 2
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bb3:
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br label %bb4
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bb4:
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br label %bb3
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}
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declare void @abort() noreturn
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; CHECK-LABEL: @"dfs$unreachable_bb2"
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define i8 @unreachable_bb2() {
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call void @abort() noreturn
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; CHECK-NOT: i8 12
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; CHECK: unreachable
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ret i8 12
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}
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