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Move getX86RegNum into X86RegisterInfo and use it

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in the trampoline lowering.  Lookup the jump and
mov opcodes for the trampoline rather than hard
coding them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41577 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands
2007-08-29 19:01:20 +00:00
parent 30b0f2f7c3
commit ee46574931
6 changed files with 80 additions and 88 deletions
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55
lib/Target/X86/X86CodeEmitter.cpp
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@@ -13,7 +13,6 @@
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "x86-emitter"
#include "X86CodeEmitter.h"
#include "X86InstrInfo.h"
#include "X86Subtarget.h"
#include "X86TargetMachine.h"
@@ -193,60 +192,8 @@ void Emitter::emitJumpTableAddress(unsigned JTI, unsigned Reloc,
MCE.emitWordLE(0); // The relocated value will be added to the displacement
}
// getX86RegNum - This function maps LLVM register identifiers to their X86
// specific numbering, which is used in various places encoding instructions.
//
unsigned Emitter::getX86RegNum(unsigned RegNo) {
switch(RegNo) {
case X86::RAX: case X86::EAX: case X86::AX: case X86::AL: return N86::EAX;
case X86::RCX: case X86::ECX: case X86::CX: case X86::CL: return N86::ECX;
case X86::RDX: case X86::EDX: case X86::DX: case X86::DL: return N86::EDX;
case X86::RBX: case X86::EBX: case X86::BX: case X86::BL: return N86::EBX;
case X86::RSP: case X86::ESP: case X86::SP: case X86::SPL: case X86::AH:
return N86::ESP;
case X86::RBP: case X86::EBP: case X86::BP: case X86::BPL: case X86::CH:
return N86::EBP;
case X86::RSI: case X86::ESI: case X86::SI: case X86::SIL: case X86::DH:
return N86::ESI;
case X86::RDI: case X86::EDI: case X86::DI: case X86::DIL: case X86::BH:
return N86::EDI;
case X86::R8: case X86::R8D: case X86::R8W: case X86::R8B:
return N86::EAX;
case X86::R9: case X86::R9D: case X86::R9W: case X86::R9B:
return N86::ECX;
case X86::R10: case X86::R10D: case X86::R10W: case X86::R10B:
return N86::EDX;
case X86::R11: case X86::R11D: case X86::R11W: case X86::R11B:
return N86::EBX;
case X86::R12: case X86::R12D: case X86::R12W: case X86::R12B:
return N86::ESP;
case X86::R13: case X86::R13D: case X86::R13W: case X86::R13B:
return N86::EBP;
case X86::R14: case X86::R14D: case X86::R14W: case X86::R14B:
return N86::ESI;
case X86::R15: case X86::R15D: case X86::R15W: case X86::R15B:
return N86::EDI;
case X86::ST0: case X86::ST1: case X86::ST2: case X86::ST3:
case X86::ST4: case X86::ST5: case X86::ST6: case X86::ST7:
return RegNo-X86::ST0;
case X86::XMM0: case X86::XMM1: case X86::XMM2: case X86::XMM3:
case X86::XMM4: case X86::XMM5: case X86::XMM6: case X86::XMM7:
return II->getRegisterInfo().getDwarfRegNum(RegNo) -
II->getRegisterInfo().getDwarfRegNum(X86::XMM0);
case X86::XMM8: case X86::XMM9: case X86::XMM10: case X86::XMM11:
case X86::XMM12: case X86::XMM13: case X86::XMM14: case X86::XMM15:
return II->getRegisterInfo().getDwarfRegNum(RegNo) -
II->getRegisterInfo().getDwarfRegNum(X86::XMM8);
default:
assert(MRegisterInfo::isVirtualRegister(RegNo) &&
"Unknown physical register!");
assert(0 && "Register allocator hasn't allocated reg correctly yet!");
return 0;
}
return ((X86RegisterInfo&)II->getRegisterInfo()).getX86RegNum(RegNo);
}
inline static unsigned char ModRMByte(unsigned Mod, unsigned RegOpcode,