[llvm] r254565 - Forgot to add this file with r254562.
David Majnemer via llvm-commits
llvm-commits at lists.llvm.org
Wed Dec 2 15:09:05 PST 2015
Author: majnemer
Date: Wed Dec 2 17:09:05 2015
New Revision: 254565
URL: http://llvm.org/viewvc/llvm-project?rev=254565&view=rev
Log:
Forgot to add this file with r254562.
Added:
llvm/trunk/lib/Analysis/EHPersonalities.cpp
Added: llvm/trunk/lib/Analysis/EHPersonalities.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Analysis/EHPersonalities.cpp?rev=254565&view=auto
==============================================================================
--- llvm/trunk/lib/Analysis/EHPersonalities.cpp (added)
+++ llvm/trunk/lib/Analysis/EHPersonalities.cpp Wed Dec 2 17:09:05 2015
@@ -0,0 +1,41 @@
+//===- EHPersonalities.cpp - Compute EH-related information ---------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Analysis/EHPersonalities.h"
+#include "llvm/ADT/StringSwitch.h"
+#include "llvm/IR/Function.h"
+using namespace llvm;
+
+/// See if the given exception handling personality function is one that we
+/// understand. If so, return a description of it; otherwise return Unknown.
+EHPersonality llvm::classifyEHPersonality(const Value *Pers) {
+ const Function *F =
+ Pers ? dyn_cast<Function>(Pers->stripPointerCasts()) : nullptr;
+ if (!F)
+ return EHPersonality::Unknown;
+ return StringSwitch<EHPersonality>(F->getName())
+ .Case("__gnat_eh_personality", EHPersonality::GNU_Ada)
+ .Case("__gxx_personality_v0", EHPersonality::GNU_CXX)
+ .Case("__gcc_personality_v0", EHPersonality::GNU_C)
+ .Case("__objc_personality_v0", EHPersonality::GNU_ObjC)
+ .Case("_except_handler3", EHPersonality::MSVC_X86SEH)
+ .Case("_except_handler4", EHPersonality::MSVC_X86SEH)
+ .Case("__C_specific_handler", EHPersonality::MSVC_Win64SEH)
+ .Case("__CxxFrameHandler3", EHPersonality::MSVC_CXX)
+ .Case("ProcessCLRException", EHPersonality::CoreCLR)
+ .Default(EHPersonality::Unknown);
+}
+
+bool llvm::canSimplifyInvokeNoUnwind(const Function *F) {
+ EHPersonality Personality = classifyEHPersonality(F->getPersonalityFn());
+ // We can't simplify any invokes to nounwind functions if the personality
+ // function wants to catch asynch exceptions. The nounwind attribute only
+ // implies that the function does not throw synchronous exceptions.
+ return !isAsynchronousEHPersonality(Personality);
+}
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