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+//===- EHPersonalities.h - 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.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_ANALYSIS_EHPERSONALITIES_H
+#define LLVM_ANALYSIS_EHPERSONALITIES_H
+
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/TinyPtrVector.h"
+#include "llvm/Support/ErrorHandling.h"
+
+namespace llvm {
+class BasicBlock;
+class Function;
+class Value;
+
+enum class EHPersonality {
+ Unknown,
+ GNU_Ada,
+ GNU_C,
+ GNU_CXX,
+ GNU_ObjC,
+ MSVC_X86SEH,
+ MSVC_Win64SEH,
+ MSVC_CXX,
+ CoreCLR
+};
+
+/// \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 a personality function that invokes
+/// handler funclets (which must return to it).
+inline bool isFuncletEHPersonality(EHPersonality Pers) {
+ switch (Pers) {
+ case EHPersonality::MSVC_CXX:
+ case EHPersonality::MSVC_X86SEH:
+ case EHPersonality::MSVC_Win64SEH:
+ case EHPersonality::CoreCLR:
+ 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);
+
+typedef TinyPtrVector<BasicBlock *> ColorVector;
+
+/// \brief If an EH funclet personality is in use (see isFuncletEHPersonality),
+/// this will recompute which blocks are in which funclet. It is possible that
+/// some blocks are in multiple funclets. Consider this analysis to be
+/// expensive.
+DenseMap<BasicBlock *, ColorVector> colorEHFunclets(Function &F);
+
+} // end namespace llvm
+
+#endif