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1148767aed
Reviewers: majnemer Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D18192 llvm-svn: 263581
96 lines
2.6 KiB
C++
96 lines
2.6 KiB
C++
//===- EHPersonalities.h - Compute EH-related information -----------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_ANALYSIS_EHPERSONALITIES_H
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#define LLVM_ANALYSIS_EHPERSONALITIES_H
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/TinyPtrVector.h"
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#include "llvm/Support/ErrorHandling.h"
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namespace llvm {
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class BasicBlock;
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class Function;
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class Value;
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enum class EHPersonality {
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Unknown,
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GNU_Ada,
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GNU_C,
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GNU_CXX,
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GNU_ObjC,
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MSVC_X86SEH,
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MSVC_Win64SEH,
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MSVC_CXX,
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CoreCLR,
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Rust
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};
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/// \brief See if the given exception handling personality function is one
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/// that we understand. If so, return a description of it; otherwise return
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/// Unknown.
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EHPersonality classifyEHPersonality(const Value *Pers);
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/// \brief Returns true if this personality function catches asynchronous
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/// exceptions.
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inline bool isAsynchronousEHPersonality(EHPersonality Pers) {
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// The two SEH personality functions can catch asynch exceptions. We assume
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// unknown personalities don't catch asynch exceptions.
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switch (Pers) {
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case EHPersonality::MSVC_X86SEH:
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case EHPersonality::MSVC_Win64SEH:
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return true;
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default:
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return false;
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}
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llvm_unreachable("invalid enum");
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}
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/// \brief Returns true if this is a personality function that invokes
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/// handler funclets (which must return to it).
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inline bool isFuncletEHPersonality(EHPersonality Pers) {
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switch (Pers) {
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case EHPersonality::MSVC_CXX:
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case EHPersonality::MSVC_X86SEH:
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case EHPersonality::MSVC_Win64SEH:
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case EHPersonality::CoreCLR:
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return true;
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default:
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return false;
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}
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llvm_unreachable("invalid enum");
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}
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/// \brief Return true if this personality may be safely removed if there
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/// are no invoke instructions remaining in the current function.
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inline bool isNoOpWithoutInvoke(EHPersonality Pers) {
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switch (Pers) {
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case EHPersonality::Unknown:
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return false;
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// All known personalities currently have this behavior
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default:
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return true;
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}
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llvm_unreachable("invalid enum");
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}
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bool canSimplifyInvokeNoUnwind(const Function *F);
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typedef TinyPtrVector<BasicBlock *> ColorVector;
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/// \brief If an EH funclet personality is in use (see isFuncletEHPersonality),
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/// this will recompute which blocks are in which funclet. It is possible that
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/// some blocks are in multiple funclets. Consider this analysis to be
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/// expensive.
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DenseMap<BasicBlock *, ColorVector> colorEHFunclets(Function &F);
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} // end namespace llvm
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#endif
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