llvm-6502/lib/Target/ARM/CMakeLists.txt

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CMake
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set(LLVM_TARGET_DEFINITIONS ARM.td)
tablegen(ARMGenRegisterInfo.inc -gen-register-info)
tablegen(ARMGenInstrInfo.inc -gen-instr-info)
tablegen(ARMGenCodeEmitter.inc -gen-emitter)
tablegen(ARMGenMCCodeEmitter.inc -gen-emitter -mc-emitter)
tablegen(ARMGenAsmWriter.inc -gen-asm-writer)
tablegen(ARMGenAsmMatcher.inc -gen-asm-matcher)
tablegen(ARMGenDAGISel.inc -gen-dag-isel)
tablegen(ARMGenFastISel.inc -gen-fast-isel)
tablegen(ARMGenCallingConv.inc -gen-callingconv)
tablegen(ARMGenSubtargetInfo.inc -gen-subtarget)
tablegen(ARMGenEDInfo.inc -gen-enhanced-disassembly-info)
tablegen(ARMGenDecoderTables.inc -gen-arm-decoder)
add_llvm_target(ARMCodeGen
ARMAsmBackend.cpp
ARMAsmPrinter.cpp
ARMBaseInstrInfo.cpp
ARMBaseRegisterInfo.cpp
ARMCodeEmitter.cpp
ARMConstantIslandPass.cpp
ARMConstantPoolValue.cpp
ARMELFWriterInfo.cpp
ARMExpandPseudoInsts.cpp
ARMFastISel.cpp
ARMFrameLowering.cpp
ARMGlobalMerge.cpp
Making use of VFP / NEON floating point multiply-accumulate / subtraction is difficult on current ARM implementations for a few reasons. 1. Even though a single vmla has latency that is one cycle shorter than a pair of vmul + vadd, a RAW hazard during the first (4? on Cortex-a8) can cause additional pipeline stall. So it's frequently better to single codegen vmul + vadd. 2. A vmla folowed by a vmul, vmadd, or vsub causes the second fp instruction to stall for 4 cycles. We need to schedule them apart. 3. A vmla followed vmla is a special case. Obvious issuing back to back RAW vmla + vmla is very bad. But this isn't ideal either: vmul vadd vmla Instead, we want to expand the second vmla: vmla vmul vadd Even with the 4 cycle vmul stall, the second sequence is still 2 cycles faster. Up to now, isel simply avoid codegen'ing fp vmla / vmls. This works well enough but it isn't the optimial solution. This patch attempts to make it possible to use vmla / vmls in cases where it is profitable. A. Add missing isel predicates which cause vmla to be codegen'ed. B. Make sure the fmul in (fadd (fmul)) has a single use. We don't want to compute a fmul and a fmla. C. Add additional isel checks for vmla, avoid cases where vmla is feeding into fp instructions (except for the #3 exceptional case). D. Add ARM hazard recognizer to model the vmla / vmls hazards. E. Add a special pre-regalloc case to expand vmla / vmls when it's likely the vmla / vmls will trigger one of the special hazards. Work in progress, only A+B are enabled. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120960 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-05 22:04:16 +00:00
ARMHazardRecognizer.cpp
ARMISelDAGToDAG.cpp
ARMISelLowering.cpp
ARMInstrInfo.cpp
ARMJITInfo.cpp
ARMMachObjectWriter.cpp
ARMMCCodeEmitter.cpp
ARMMCExpr.cpp
ARMLoadStoreOptimizer.cpp
ARMMCAsmInfo.cpp
ARMMCInstLower.cpp
ARMRegisterInfo.cpp
ARMSelectionDAGInfo.cpp
ARMSubtarget.cpp
ARMTargetMachine.cpp
ARMTargetObjectFile.cpp
MLxExpansionPass.cpp
NEONMoveFix.cpp
Thumb1InstrInfo.cpp
Thumb1FrameLowering.cpp
Thumb1RegisterInfo.cpp
Thumb2ITBlockPass.cpp
Thumb2InstrInfo.cpp
Thumb2RegisterInfo.cpp
Thumb2SizeReduction.cpp
)
# workaround for hanging compilation on MSVC10
if( MSVC_VERSION EQUAL 1600 )
set_property(
SOURCE ARMISelLowering.cpp
PROPERTY COMPILE_FLAGS "/Od"
)
endif()
add_subdirectory(TargetInfo)
add_subdirectory(AsmParser)
add_subdirectory(Disassembler)
add_subdirectory(InstPrinter)
add_subdirectory(MCTargetDesc)