[PATCH] D11093: Target RegisterInfo: devirtualize TargetFrameLowering

[JF Bastien]

jfb created this revision.
jfb added subscribers: llvm-commits, sunfish.
Herald added subscribers: jfb, ted.

The target frame lowering's concrete type is always known in RegisterInfo, yet it's only sometimes devirtualized through a static_cast. This change adds an auto-generated static function <Target>GenRegisterInfo::getFrameLowering(const MachineFunction &MF) which does this devirtualization, and uses this function in all targets which can.

This change was suggested by sunfish in D11070 for WebAssembly, I figure that I may as well improve the other targets while I'm here.

http://reviews.llvm.org/D11093

Files:
  lib/Target/AArch64/AArch64RegisterInfo.cpp
  lib/Target/ARM/ARMBaseRegisterInfo.cpp
  lib/Target/Hexagon/HexagonRegisterInfo.cpp
  lib/Target/MSP430/MSP430RegisterInfo.cpp
  lib/Target/PowerPC/PPCRegisterInfo.cpp
  lib/Target/SystemZ/SystemZRegisterInfo.cpp
  lib/Target/X86/X86RegisterInfo.cpp
  lib/Target/XCore/XCoreRegisterInfo.cpp
  utils/TableGen/RegisterInfoEmitter.cpp

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