diff options
Diffstat (limited to 'include/llvm/Target/TargetInstrInfo.h')
| -rw-r--r-- | include/llvm/Target/TargetInstrInfo.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/llvm/Target/TargetInstrInfo.h b/include/llvm/Target/TargetInstrInfo.h index f9edc7d..d4e14f6 100644 --- a/include/llvm/Target/TargetInstrInfo.h +++ b/include/llvm/Target/TargetInstrInfo.h @@ -181,6 +181,23 @@ public: return false; } + /// Compute the size in bytes and offset within a stack slot of a spilled + /// register or subregister. + /// + /// \param [out] Size in bytes of the spilled value. + /// \param [out] Offset in bytes within the stack slot. + /// \returns true if both Size and Offset are successfully computed. + /// + /// Not all subregisters have computable spill slots. For example, + /// subregisters registers may not be byte-sized, and a pair of discontiguous + /// subregisters has no single offset. + /// + /// Targets with nontrivial bigendian implementations may need to override + /// this, particularly to support spilled vector registers. + virtual bool getStackSlotRange(const TargetRegisterClass *RC, unsigned SubIdx, + unsigned &Size, unsigned &Offset, + const TargetMachine *TM) const; + /// reMaterialize - Re-issue the specified 'original' instruction at the /// specific location targeting a new destination register. /// The register in Orig->getOperand(0).getReg() will be substituted by |