#include "llvm/Analysis/ValueTracking.h"
#include "llvm/CodeGen/LiveIntervalAnalysis.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
+#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineMemOperand.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
if (const PseudoSourceValue *PSV =
(*MI->memoperands_begin())->getPseudoValue()) {
+ // Function that contain tail calls don't have unique PseudoSourceValue
+ // objects. Two PseudoSourceValues might refer to the same or overlapping
+ // locations. The client code calling this function assumes this is not the
+ // case. So return a conservative answer of no known object.
+ if (MFI->hasTailCall())
+ return;
+
// For now, ignore PseudoSourceValues which may alias LLVM IR values
// because the code that uses this function has no way to cope with
// such aliases.