/// variable sized allocas or if frame pointer elimination is disabled.
virtual bool hasFP(const MachineFunction &MF) const = 0;
+ // hasReservedCallFrame - Under normal circumstances, when a frame pointer is
+ // not required, we reserve argument space for call sites in the function
+ // immediately on entry to the current function. This eliminates the need for
+ // add/sub sp brackets around call sites. Returns true if the call frame is
+ // included as part of the stack frame.
+ virtual bool hasReservedCallFrame(MachineFunction &MF) const {
+ return !hasFP(MF);
+ }
+
/// getCallFrameSetup/DestroyOpcode - These methods return the opcode of the
/// frame setup/destroy instructions if they exist (-1 otherwise). Some
/// targets use pseudo instructions in order to abstract away the difference