diff options
| -rw-r--r-- | include/llvm/Target/MRegisterInfo.h | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/include/llvm/Target/MRegisterInfo.h b/include/llvm/Target/MRegisterInfo.h index 6091c46937..a45d53aa3c 100644 --- a/include/llvm/Target/MRegisterInfo.h +++ b/include/llvm/Target/MRegisterInfo.h @@ -283,7 +283,9 @@ public: } /// getCalleeSaveRegs - Return a null-terminated list of all of the - /// callee-save registers on this target. + /// callee-save registers on this target. The register should be in the + /// order of desired callee-save stack frame offset. The first register is + /// closed to the incoming stack pointer if stack grows down, and vice versa. virtual const unsigned* getCalleeSaveRegs() const = 0; /// getCalleeSaveRegClasses - Return a null-terminated list of the preferred @@ -371,12 +373,16 @@ public: assert(0 && "Call Frame Pseudo Instructions do not exist on this target!"); } + /// processFunctionBeforeCalleeSaveScan - This method is called immediately + /// before PrologEpilogInserter scans the physical registers used to determine + /// what callee-save registers should be spilled. This method is optional. + virtual void processFunctionBeforeCalleeSaveScan(MachineFunction &MF) const { + } + /// processFunctionBeforeFrameFinalized - This method is called immediately /// before the specified functions frame layout (MF.getFrameInfo()) is /// finalized. Once the frame is finalized, MO_FrameIndex operands are - /// replaced with direct constants. This method is optional. The return value - /// is the number of instructions added to (negative if removed from) the - /// basic block + /// replaced with direct constants. This method is optional. /// virtual void processFunctionBeforeFrameFinalized(MachineFunction &MF) const { } |