1 //===- EHPersonalities.cpp - Compute EH-related information ---------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/Analysis/EHPersonalities.h"
11 #include "llvm/ADT/StringSwitch.h"
12 #include "llvm/IR/Function.h"
15 /// See if the given exception handling personality function is one that we
16 /// understand. If so, return a description of it; otherwise return Unknown.
17 EHPersonality llvm::classifyEHPersonality(const Value *Pers) {
19 Pers ? dyn_cast<Function>(Pers->stripPointerCasts()) : nullptr;
21 return EHPersonality::Unknown;
22 return StringSwitch<EHPersonality>(F->getName())
23 .Case("__gnat_eh_personality", EHPersonality::GNU_Ada)
24 .Case("__gxx_personality_v0", EHPersonality::GNU_CXX)
25 .Case("__gcc_personality_v0", EHPersonality::GNU_C)
26 .Case("__objc_personality_v0", EHPersonality::GNU_ObjC)
27 .Case("_except_handler3", EHPersonality::MSVC_X86SEH)
28 .Case("_except_handler4", EHPersonality::MSVC_X86SEH)
29 .Case("__C_specific_handler", EHPersonality::MSVC_Win64SEH)
30 .Case("__CxxFrameHandler3", EHPersonality::MSVC_CXX)
31 .Case("ProcessCLRException", EHPersonality::CoreCLR)
32 .Default(EHPersonality::Unknown);
35 bool llvm::canSimplifyInvokeNoUnwind(const Function *F) {
36 EHPersonality Personality = classifyEHPersonality(F->getPersonalityFn());
37 // We can't simplify any invokes to nounwind functions if the personality
38 // function wants to catch asynch exceptions. The nounwind attribute only
39 // implies that the function does not throw synchronous exceptions.
40 return !isAsynchronousEHPersonality(Personality);