Jakob Stoklund Olesen 374ed322f2 Add a new kind of MachineOperand: MO_RegisterMask. ... Register masks will be used as a compact representation of large clobber lists. Currently, an x86 call instruction has some 40 operands representing call-clobbered registers. That's more than 1kB of useless operands per call site. A register mask operand references a bit mask of call-preserved registers, everything else is clobbered. The bit mask will typically come from TargetRegisterInfo::getCallPreservedMask(). By abandoning ImplicitDefs for call-clobbered registers, it also becomes possible to share call instruction descriptions between calling conventions, and we can get rid of the WINCALL* instructions. This patch introduces the new operand kind. Future patches will add RegMask support to target-independent passes before finally the fixed clobber lists can be removed from call instruction descriptions. llvm-svn: 148250		2012-01-16 19:22:00 +00:00
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llvm	Add a new kind of MachineOperand: MO_RegisterMask.	2012-01-16 19:22:00 +00:00
llvm-c	Add support to add named metadata operand.	2011-12-20 19:29:36 +00:00