+
+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;
+}