Jakob Stoklund Olesen 7739cad69d 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148250 91177308-0d34-0410-b5e6-96231b3b80d8

2012-01-16 19:22:00 +00:00

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CommandGuide

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HistoricalNotes

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tutorial

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AliasAnalysis.html

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Atomics.html

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Bugpoint.html

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CFEBuildInstrs.html

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CMake.html

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CodeGenerator.html

Add a new kind of MachineOperand: MO_RegisterMask.

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CodingStandards.html

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CommandLine.html

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CompilerWriterInfo.html

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DebuggingJITedCode.html

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DeveloperPolicy.html

Jakob is the code owner of register allocation and TableGen.

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doxygen.cfg.in

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doxygen.css

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doxygen.footer

Happy new year 2012!

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doxygen.header

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ExceptionHandling.html

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ExtendedIntegerResults.txt

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ExtendingLLVM.html

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FAQ.html

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GarbageCollection.html

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GCCFEBuildInstrs.html

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GetElementPtr.html

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GettingStarted.html

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GettingStartedVS.html

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GoldPlugin.html

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HowToAddABuilder.html

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HowToReleaseLLVM.html

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index.html

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LangRef.html

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Lexicon.html

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llvm.css

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LLVMBuild.html

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LLVMBuild.txt

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Makefile

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MakefileGuide.html

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Packaging.html

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Passes.html

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ProgrammersManual.html

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Projects.html

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ReleaseNotes.html

Add a new kind of MachineOperand: MO_RegisterMask.

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SegmentedStacks.html

Release notes for segmented stacks.

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SourceLevelDebugging.html

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SystemLibrary.html

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TableGenFundamentals.html

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TestingGuide.html

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WritingAnLLVMBackend.html

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WritingAnLLVMPass.html

Revert r146041 et al. The FunctionPass doesn't take an address but the ID.

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