//===----------------------------------------------------------------------===//
#include "llvm/Analysis/LibCallSemantics.h"
-#include "llvm/ADT/StringMap.h"
-#include "llvm/Function.h"
+#include "llvm/ADT/StringSwitch.h"
+#include "llvm/IR/Function.h"
using namespace llvm;
-/// getMap - This impl pointer in ~LibCallInfo is actually a StringMap. This
-/// helper does the cast.
-static StringMap<const LibCallFunctionInfo*> *getMap(void *Ptr) {
- return static_cast<StringMap<const LibCallFunctionInfo*> *>(Ptr);
+/// 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)
+ .Default(EHPersonality::Unknown);
}
-LibCallInfo::~LibCallInfo() {
- delete getMap(Impl);
+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);
}
-
-const LibCallLocationInfo &LibCallInfo::getLocationInfo(unsigned LocID) const {
- // Get location info on the first call.
- if (NumLocations == 0)
- NumLocations = getLocationInfo(Locations);
-
- assert(LocID < NumLocations && "Invalid location ID!");
- return Locations[LocID];
-}
-
-
-/// getFunctionInfo - Return the LibCallFunctionInfo object corresponding to
-/// the specified function if we have it. If not, return null.
-const LibCallFunctionInfo *LibCallInfo::getFunctionInfo(Function *F) const {
- StringMap<const LibCallFunctionInfo*> *Map = getMap(Impl);
-
- /// If this is the first time we are querying for this info, lazily construct
- /// the StringMap to index it.
- if (Map == 0) {
- Impl = Map = new StringMap<const LibCallFunctionInfo*>();
-
- const LibCallFunctionInfo *Array = getFunctionInfoArray();
- if (Array == 0) return 0;
-
- // We now have the array of entries. Populate the StringMap.
- for (unsigned i = 0; Array[i].Name; ++i)
- (*Map)[Array[i].Name] = Array+i;
- }
-
- // Look up this function in the string map.
- return Map->lookup(F->getName());
-}
-