mirror of
https://github.com/RPCSX/llvm.git
synced 2026-01-31 01:05:23 +01:00
0cf84bc911
infrastructure. This AA was never used in tree. It's infrastructure also completely overlaps that of TargetLibraryInfo which is used heavily by BasicAA to achieve similar goals to those stated for this analysis. As has come up in several discussions, the use case here is still really important, but this code isn't helping move toward that use case. Any progress on better supporting rich AA information for runtime library environments would likely be better off starting from scratch or starting from TargetLibraryInfo than from this base. Differential Revision: http://reviews.llvm.org/D12028 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@245155 91177308-0d34-0410-b5e6-96231b3b80d8
84 lines
2.5 KiB
C++
84 lines
2.5 KiB
C++
//===- LibCallSemantics.h - Describe library semantics --------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines interfaces that can be used to describe language specific
|
|
// runtime library interfaces (e.g. libc, libm, etc) to LLVM optimizers.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_ANALYSIS_LIBCALLSEMANTICS_H
|
|
#define LLVM_ANALYSIS_LIBCALLSEMANTICS_H
|
|
|
|
#include "llvm/Analysis/AliasAnalysis.h"
|
|
|
|
namespace llvm {
|
|
class InvokeInst;
|
|
|
|
enum class EHPersonality {
|
|
Unknown,
|
|
GNU_Ada,
|
|
GNU_C,
|
|
GNU_CXX,
|
|
GNU_ObjC,
|
|
MSVC_X86SEH,
|
|
MSVC_Win64SEH,
|
|
MSVC_CXX,
|
|
};
|
|
|
|
/// \brief See if the given exception handling personality function is one
|
|
/// that we understand. If so, return a description of it; otherwise return
|
|
/// Unknown.
|
|
EHPersonality classifyEHPersonality(const Value *Pers);
|
|
|
|
/// \brief Returns true if this personality function catches asynchronous
|
|
/// exceptions.
|
|
inline bool isAsynchronousEHPersonality(EHPersonality Pers) {
|
|
// The two SEH personality functions can catch asynch exceptions. We assume
|
|
// unknown personalities don't catch asynch exceptions.
|
|
switch (Pers) {
|
|
case EHPersonality::MSVC_X86SEH:
|
|
case EHPersonality::MSVC_Win64SEH:
|
|
return true;
|
|
default: return false;
|
|
}
|
|
llvm_unreachable("invalid enum");
|
|
}
|
|
|
|
/// \brief Returns true if this is an MSVC personality function.
|
|
inline bool isMSVCEHPersonality(EHPersonality Pers) {
|
|
// The two SEH personality functions can catch asynch exceptions. We assume
|
|
// unknown personalities don't catch asynch exceptions.
|
|
switch (Pers) {
|
|
case EHPersonality::MSVC_CXX:
|
|
case EHPersonality::MSVC_X86SEH:
|
|
case EHPersonality::MSVC_Win64SEH:
|
|
return true;
|
|
default: return false;
|
|
}
|
|
llvm_unreachable("invalid enum");
|
|
}
|
|
|
|
/// \brief Return true if this personality may be safely removed if there
|
|
/// are no invoke instructions remaining in the current function.
|
|
inline bool isNoOpWithoutInvoke(EHPersonality Pers) {
|
|
switch (Pers) {
|
|
case EHPersonality::Unknown:
|
|
return false;
|
|
// All known personalities currently have this behavior
|
|
default: return true;
|
|
}
|
|
llvm_unreachable("invalid enum");
|
|
}
|
|
|
|
bool canSimplifyInvokeNoUnwind(const Function *F);
|
|
|
|
} // end namespace llvm
|
|
|
|
#endif
|