#include "llvm/Analysis/LibCallSemantics.h"
#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/StringSwitch.h"
#include "llvm/IR/Function.h"
using namespace llvm;
return Map->lookup(F->getName());
}
+/// 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 = dyn_cast<Function>(Pers->stripPointerCasts());
+ 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)
+ .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);
+}