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7174af9bac
Also delete and simplify a lot of MachineModuleInfo code that used to be needed to handle personalities on landingpads. Now that the personality is on the LLVM Function, we no longer need to track it this way on MMI. Certainly it should not live on LandingPadInfo. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@246478 91177308-0d34-0410-b5e6-96231b3b80d8
47 lines
2.0 KiB
C++
47 lines
2.0 KiB
C++
//===- LibCallSemantics.cpp - Describe library semantics ------------------===//
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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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//
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// This file implements interfaces that can be used to describe language
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// specific runtime library interfaces (e.g. libc, libm, etc) to LLVM
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// optimizers.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Analysis/LibCallSemantics.h"
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#include "llvm/ADT/StringSwitch.h"
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#include "llvm/IR/Function.h"
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using namespace llvm;
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/// See if the given exception handling personality function is one that we
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/// understand. If so, return a description of it; otherwise return Unknown.
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EHPersonality llvm::classifyEHPersonality(const Value *Pers) {
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const Function *F =
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Pers ? dyn_cast<Function>(Pers->stripPointerCasts()) : nullptr;
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if (!F)
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return EHPersonality::Unknown;
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return StringSwitch<EHPersonality>(F->getName())
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.Case("__gnat_eh_personality", EHPersonality::GNU_Ada)
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.Case("__gxx_personality_v0", EHPersonality::GNU_CXX)
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.Case("__gcc_personality_v0", EHPersonality::GNU_C)
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.Case("__objc_personality_v0", EHPersonality::GNU_ObjC)
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.Case("_except_handler3", EHPersonality::MSVC_X86SEH)
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.Case("_except_handler4", EHPersonality::MSVC_X86SEH)
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.Case("__C_specific_handler", EHPersonality::MSVC_Win64SEH)
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.Case("__CxxFrameHandler3", EHPersonality::MSVC_CXX)
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.Default(EHPersonality::Unknown);
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}
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bool llvm::canSimplifyInvokeNoUnwind(const Function *F) {
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EHPersonality Personality = classifyEHPersonality(F->getPersonalityFn());
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// We can't simplify any invokes to nounwind functions if the personality
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// function wants to catch asynch exceptions. The nounwind attribute only
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// implies that the function does not throw synchronous exceptions.
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return !isAsynchronousEHPersonality(Personality);
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}
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