Refactor MASM probe CPUState to use arrays for register storage.

Refactor MASM probe CPUState to use arrays for register storage.
https://bugs.webkit.org/show_bug.cgi?id=174694

Reviewed by Keith Miller.

Using arrays for register storage in CPUState allows us to do away with the
huge switch statements to decode each register id.  We can now simply index into
the arrays.

With this patch, we now:

1. Remove the need for macros for defining the list of CPU registers.
   We can go back to simple enums.  This makes the code easier to read.

2. Make the assembler the authority on register names.
   Most of this code is moved into the assembler from GPRInfo and FPRInfo.
   GPRInfo and FPRInfo now forwards to the assembler.

3. Make the assembler the authority on the number of registers of each type.

4. Fix a "bug" in ARMv7's lastRegister().  It was previously omitting lr and pc.
   This is inconsistent with how every other CPU architecture implements
   lastRegister().  This patch fixes it to return the true last GPR i.e. pc, but
   updates RegisterSet::reservedHardwareRegisters() to exclude those registers.

* assembler/ARM64Assembler.h:
(JSC::ARM64Assembler::numberOfRegisters):
(JSC::ARM64Assembler::firstSPRegister):
(JSC::ARM64Assembler::lastSPRegister):
(JSC::ARM64Assembler::numberOfSPRegisters):
(JSC::ARM64Assembler::numberOfFPRegisters):
(JSC::ARM64Assembler::gprName):
(JSC::ARM64Assembler::sprName):
(JSC::ARM64Assembler::fprName):
* assembler/ARMAssembler.h:
(JSC::ARMAssembler::numberOfRegisters):
(JSC::ARMAssembler::firstSPRegister):
(JSC::ARMAssembler::lastSPRegister):
(JSC::ARMAssembler::numberOfSPRegisters):
(JSC::ARMAssembler::numberOfFPRegisters):
(JSC::ARMAssembler::gprName):
(JSC::ARMAssembler::sprName):
(JSC::ARMAssembler::fprName):
* assembler/ARMv7Assembler.h:
(JSC::ARMv7Assembler::lastRegister):
(JSC::ARMv7Assembler::numberOfRegisters):
(JSC::ARMv7Assembler::firstSPRegister):
(JSC::ARMv7Assembler::lastSPRegister):
(JSC::ARMv7Assembler::numberOfSPRegisters):
(JSC::ARMv7Assembler::numberOfFPRegisters):
(JSC::ARMv7Assembler::gprName):
(JSC::ARMv7Assembler::sprName):
(JSC::ARMv7Assembler::fprName):
* assembler/AbstractMacroAssembler.h:
(JSC::AbstractMacroAssembler::numberOfRegisters):
(JSC::AbstractMacroAssembler::gprName):
(JSC::AbstractMacroAssembler::firstSPRegister):
(JSC::AbstractMacroAssembler::lastSPRegister):
(JSC::AbstractMacroAssembler::numberOfSPRegisters):
(JSC::AbstractMacroAssembler::sprName):
(JSC::AbstractMacroAssembler::numberOfFPRegisters):
(JSC::AbstractMacroAssembler::fprName):
* assembler/MIPSAssembler.h:
(JSC::MIPSAssembler::numberOfRegisters):
(JSC::MIPSAssembler::firstSPRegister):
(JSC::MIPSAssembler::lastSPRegister):
(JSC::MIPSAssembler::numberOfSPRegisters):
(JSC::MIPSAssembler::numberOfFPRegisters):
(JSC::MIPSAssembler::gprName):
(JSC::MIPSAssembler::sprName):
(JSC::MIPSAssembler::fprName):
* assembler/MacroAssembler.h:
(JSC::MacroAssembler::CPUState::gprName):
(JSC::MacroAssembler::CPUState::sprName):
(JSC::MacroAssembler::CPUState::fprName):
(JSC::MacroAssembler::CPUState::gpr):
(JSC::MacroAssembler::CPUState::spr):
(JSC::MacroAssembler::CPUState::fpr):
(JSC::MacroAssembler::CPUState::pc):
(JSC::MacroAssembler::CPUState::fp):
(JSC::MacroAssembler::CPUState::sp):
(JSC::ProbeContext::gpr):
(JSC::ProbeContext::spr):
(JSC::ProbeContext::fpr):
(JSC::ProbeContext::gprName):
(JSC::ProbeContext::sprName):
(JSC::ProbeContext::fprName):
(JSC::MacroAssembler::numberOfRegisters): Deleted.
(JSC::MacroAssembler::numberOfFPRegisters): Deleted.
* assembler/MacroAssemblerARM.cpp:
* assembler/MacroAssemblerARM64.cpp:
(JSC::arm64ProbeTrampoline):
* assembler/MacroAssemblerARMv7.cpp:
* assembler/MacroAssemblerPrinter.cpp:
(JSC::Printer::nextID):
(JSC::Printer::printAllRegisters):
(JSC::Printer::printPCRegister):
(JSC::Printer::printRegisterID):
(JSC::Printer::printAddress):
* assembler/MacroAssemblerX86Common.cpp:
* assembler/X86Assembler.h:
(JSC::X86Assembler::numberOfRegisters):
(JSC::X86Assembler::firstSPRegister):
(JSC::X86Assembler::lastSPRegister):
(JSC::X86Assembler::numberOfSPRegisters):
(JSC::X86Assembler::numberOfFPRegisters):
(JSC::X86Assembler::gprName):
(JSC::X86Assembler::sprName):
(JSC::X86Assembler::fprName):
* jit/FPRInfo.h:
(JSC::FPRInfo::debugName):
* jit/GPRInfo.h:
(JSC::GPRInfo::debugName):
* jit/RegisterSet.cpp:
(JSC::RegisterSet::reservedHardwareRegisters):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@219740 268f45cc-cd09-0410-ab3c-d52691b4dbfc