#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/PseudoSourceValue.h"
#include "llvm/DerivedTypes.h"
-#include "llvm/Support/Compiler.h"
+#include "llvm/LLVMContext.h"
+#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/System/Mutex.h"
#include <map>
+using namespace llvm;
-namespace llvm {
- static ManagedStatic<PseudoSourceValue[4]> PSVs;
-
- const PseudoSourceValue *PseudoSourceValue::getStack()
- { return &(*PSVs)[0]; }
- const PseudoSourceValue *PseudoSourceValue::getGOT()
- { return &(*PSVs)[1]; }
- const PseudoSourceValue *PseudoSourceValue::getJumpTable()
- { return &(*PSVs)[2]; }
- const PseudoSourceValue *PseudoSourceValue::getConstantPool()
- { return &(*PSVs)[3]; }
-
- static const char *const PSVNames[] = {
- "Stack",
- "GOT",
- "JumpTable",
- "ConstantPool"
- };
-
- PseudoSourceValue::PseudoSourceValue() :
- Value(PointerType::getUnqual(Type::Int8Ty), PseudoSourceValueVal) {}
-
- void PseudoSourceValue::print(std::ostream &OS) const {
- OS << PSVNames[this - *PSVs];
+namespace {
+struct PSVGlobalsTy {
+ // PseudoSourceValues are immutable so don't need locking.
+ const PseudoSourceValue PSVs[4];
+ sys::Mutex Lock; // Guards FSValues, but not the values inside it.
+ std::map<int, const PseudoSourceValue *> FSValues;
+
+ PSVGlobalsTy() : PSVs() {}
+ ~PSVGlobalsTy() {
+ for (std::map<int, const PseudoSourceValue *>::iterator
+ I = FSValues.begin(), E = FSValues.end(); I != E; ++I) {
+ delete I->second;
+ }
}
+};
- /// FixedStackPseudoSourceValue - A specialized PseudoSourceValue
- /// for holding FixedStack values, which must include a frame
- /// index.
- class VISIBILITY_HIDDEN FixedStackPseudoSourceValue
- : public PseudoSourceValue {
- const int FI;
- public:
- explicit FixedStackPseudoSourceValue(int fi) : FI(fi) {}
+static ManagedStatic<PSVGlobalsTy> PSVGlobals;
- virtual bool isConstant(const MachineFrameInfo *MFI) const;
+} // anonymous namespace
- virtual void print(std::ostream &OS) const {
- OS << "FixedStack" << FI;
- }
- };
+const PseudoSourceValue *PseudoSourceValue::getStack()
+{ return &PSVGlobals->PSVs[0]; }
+const PseudoSourceValue *PseudoSourceValue::getGOT()
+{ return &PSVGlobals->PSVs[1]; }
+const PseudoSourceValue *PseudoSourceValue::getJumpTable()
+{ return &PSVGlobals->PSVs[2]; }
+const PseudoSourceValue *PseudoSourceValue::getConstantPool()
+{ return &PSVGlobals->PSVs[3]; }
- static ManagedStatic<std::map<int, const PseudoSourceValue *> > FSValues;
+static const char *const PSVNames[] = {
+ "Stack",
+ "GOT",
+ "JumpTable",
+ "ConstantPool"
+};
- const PseudoSourceValue *PseudoSourceValue::getFixedStack(int FI) {
- const PseudoSourceValue *&V = (*FSValues)[FI];
- if (!V)
- V = new FixedStackPseudoSourceValue(FI);
- return V;
- }
+// FIXME: THIS IS A HACK!!!!
+// Eventually these should be uniqued on LLVMContext rather than in a managed
+// static. For now, we can safely use the global context for the time being to
+// squeak by.
+PseudoSourceValue::PseudoSourceValue(enum ValueTy Subclass) :
+ Value(Type::getInt8PtrTy(getGlobalContext()),
+ Subclass) {}
+
+void PseudoSourceValue::printCustom(raw_ostream &O) const {
+ O << PSVNames[this - PSVGlobals->PSVs];
+}
- bool PseudoSourceValue::isConstant(const MachineFrameInfo *) const {
- if (this == getStack())
- return false;
- if (this == getGOT() ||
- this == getConstantPool() ||
- this == getJumpTable())
- return true;
- assert(0 && "Unknown PseudoSourceValue!");
+const PseudoSourceValue *PseudoSourceValue::getFixedStack(int FI) {
+ PSVGlobalsTy &PG = *PSVGlobals;
+ sys::ScopedLock locked(PG.Lock);
+ const PseudoSourceValue *&V = PG.FSValues[FI];
+ if (!V)
+ V = new FixedStackPseudoSourceValue(FI);
+ return V;
+}
+
+bool PseudoSourceValue::isConstant(const MachineFrameInfo *) const {
+ if (this == getStack())
return false;
- }
+ if (this == getGOT() ||
+ this == getConstantPool() ||
+ this == getJumpTable())
+ return true;
+ llvm_unreachable("Unknown PseudoSourceValue!");
+ return false;
+}
- bool
- FixedStackPseudoSourceValue::isConstant(const MachineFrameInfo *MFI) const {
- return MFI && MFI->isImmutableObjectIndex(FI);
- }
+bool PseudoSourceValue::isAliased(const MachineFrameInfo *MFI) const {
+ if (this == getStack() ||
+ this == getGOT() ||
+ this == getConstantPool() ||
+ this == getJumpTable())
+ return false;
+ llvm_unreachable("Unknown PseudoSourceValue!");
+ return true;
+}
+
+bool PseudoSourceValue::mayAlias(const MachineFrameInfo *MFI) const {
+ if (this == getGOT() ||
+ this == getConstantPool() ||
+ this == getJumpTable())
+ return false;
+ return true;
+}
+
+bool FixedStackPseudoSourceValue::isConstant(const MachineFrameInfo *MFI) const{
+ return MFI && MFI->isImmutableObjectIndex(FI);
+}
+
+bool FixedStackPseudoSourceValue::isAliased(const MachineFrameInfo *MFI) const {
+ // Negative frame indices are used for special things that don't
+ // appear in LLVM IR. Non-negative indices may be used for things
+ // like static allocas.
+ if (!MFI)
+ return FI >= 0;
+ // Spill slots should not alias others.
+ return !MFI->isFixedObjectIndex(FI) && !MFI->isSpillSlotObjectIndex(FI);
+}
+
+bool FixedStackPseudoSourceValue::mayAlias(const MachineFrameInfo *MFI) const {
+ if (!MFI)
+ return true;
+ // Spill slots will not alias any LLVM IR value.
+ return !MFI->isSpillSlotObjectIndex(FI);
+}
+
+void FixedStackPseudoSourceValue::printCustom(raw_ostream &OS) const {
+ OS << "FixedStack" << FI;
}