return false;
}
+ /// Return true if the target needs to disable frame pointer elimination.
+ virtual bool noFramePointerElim(const MachineFunction &MF) const;
+
/// hasFP - Return true if the specified function should have a dedicated
/// frame pointer register. For most targets this is true only if the function
/// has variable sized allocas or if frame pointer elimination is disabled.
llvm_unreachable("Call Frame Pseudo Instructions do not exist on this "
"target!");
}
+
+ /// Check whether or not the given \p MBB can be used as a prologue
+ /// for the target.
+ /// The prologue will be inserted first in this basic block.
+ /// This method is used by the shrink-wrapping pass to decide if
+ /// \p MBB will be correctly handled by the target.
+ /// As soon as the target enable shrink-wrapping without overriding
+ /// this method, we assume that each basic block is a valid
+ /// prologue.
+ virtual bool canUseAsPrologue(const MachineBasicBlock &MBB) const {
+ return true;
+ }
+
+ /// Check whether or not the given \p MBB can be used as a epilogue
+ /// for the target.
+ /// The epilogue will be inserted before the first terminator of that block.
+ /// This method is used by the shrink-wrapping pass to decide if
+ /// \p MBB will be correctly handled by the target.
+ /// As soon as the target enable shrink-wrapping without overriding
+ /// this method, we assume that each basic block is a valid
+ /// epilogue.
+ virtual bool canUseAsEpilogue(const MachineBasicBlock &MBB) const {
+ return true;
+ }
};
} // End llvm namespace