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Use getRegForInlineAsmConstraint instead of custom defining regclasses

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via vectors.

Part of rdar://9643582

llvm-svn: 134079
This commit is contained in:
Eric Christopher 2011-06-29 17:23:50 +00:00
parent 91e568589d
commit 3cd31a95dd
2 changed files with 26 additions and 58 deletions
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80
lib/Target/X86/X86ISelLowering.cpp
View File

@ -12875,60 +12875,6 @@ void X86TargetLowering::LowerAsmOperandForConstraint(SDValue Op,
return TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, Ops, DAG);
}
std::vector<unsigned> X86TargetLowering::
getRegClassForInlineAsmConstraint(const std::string &Constraint,
EVT VT) const {
if (Constraint.size() == 1) {
// FIXME: not handling fp-stack yet!
switch (Constraint[0]) { // GCC X86 Constraint Letters
default: break; // Unknown constraint letter
case 'q': // GENERAL_REGS in 64-bit mode, Q_REGS in 32-bit mode.
if (Subtarget->is64Bit()) {
if (VT == MVT::i32)
return make_vector<unsigned>(X86::EAX, X86::EDX, X86::ECX, X86::EBX,
X86::ESI, X86::EDI, X86::R8D, X86::R9D,
X86::R10D,X86::R11D,X86::R12D,
X86::R13D,X86::R14D,X86::R15D,
X86::EBP, X86::ESP, 0);
else if (VT == MVT::i16)
return make_vector<unsigned>(X86::AX, X86::DX, X86::CX, X86::BX,
X86::SI, X86::DI, X86::R8W,X86::R9W,
X86::R10W,X86::R11W,X86::R12W,
X86::R13W,X86::R14W,X86::R15W,
X86::BP, X86::SP, 0);
else if (VT == MVT::i8)
return make_vector<unsigned>(X86::AL, X86::DL, X86::CL, X86::BL,
X86::SIL, X86::DIL, X86::R8B,X86::R9B,
X86::R10B,X86::R11B,X86::R12B,
X86::R13B,X86::R14B,X86::R15B,
X86::BPL, X86::SPL, 0);
else if (VT == MVT::i64)
return make_vector<unsigned>(X86::RAX, X86::RDX, X86::RCX, X86::RBX,
X86::RSI, X86::RDI, X86::R8, X86::R9,
X86::R10, X86::R11, X86::R12,
X86::R13, X86::R14, X86::R15,
X86::RBP, X86::RSP, 0);
break;
}
// 32-bit fallthrough
case 'Q': // Q_REGS
if (VT == MVT::i32)
return make_vector<unsigned>(X86::EAX, X86::EDX, X86::ECX, X86::EBX, 0);
else if (VT == MVT::i16)
return make_vector<unsigned>(X86::AX, X86::DX, X86::CX, X86::BX, 0);
else if (VT == MVT::i8)
return make_vector<unsigned>(X86::AL, X86::DL, X86::CL, X86::BL, 0);
else if (VT == MVT::i64)
return make_vector<unsigned>(X86::RAX, X86::RDX, X86::RCX, X86::RBX, 0);
break;
}
}
return std::vector<unsigned>();
}
std::pair<unsigned, const TargetRegisterClass*>
X86TargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
EVT VT) const {
@ -12938,6 +12884,32 @@ X86TargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
// GCC Constraint Letters
switch (Constraint[0]) {
default: break;
// TODO: Slight differences here in allocation order and leaving
// RIP in the class. Do they matter any more here than they do
// in the normal allocation?
case 'q': // GENERAL_REGS in 64-bit mode, Q_REGS in 32-bit mode.
if (Subtarget->is64Bit()) {
if (VT == MVT::i32)
return std::make_pair(0U, X86::GR32RegisterClass);
else if (VT == MVT::i16)
return std::make_pair(0U, X86::GR16RegisterClass);
else if (VT == MVT::i8)
return std::make_pair(0U, X86::GR8RegisterClass);
else if (VT == MVT::i64)
return std::make_pair(0U, X86::GR64RegisterClass);
break;
}
// 32-bit fallthrough
case 'Q': // Q_REGS
if (VT == MVT::i32)
return std::make_pair(0U, X86::GR32_ABCDRegisterClass);
else if (VT == MVT::i16)
return std::make_pair(0U, X86::GR16_ABCDRegisterClass);
else if (VT == MVT::i8)
return std::make_pair(0U, X86::GR8_ABCD_LRegisterClass);
else if (VT == MVT::i64)
return std::make_pair(0U, X86::GR64_ABCDRegisterClass);
break;
case 'r': // GENERAL_REGS
case 'l': // INDEX_REGS
if (VT == MVT::i8)

4
lib/Target/X86/X86ISelLowering.h
View File

@ -596,10 +596,6 @@ namespace llvm {
virtual ConstraintWeight getSingleConstraintMatchWeight(
AsmOperandInfo &info, const char *constraint) const;
std::vector<unsigned>
getRegClassForInlineAsmConstraint(const std::string &Constraint,
EVT VT) const;
virtual const char *LowerXConstraint(EVT ConstraintVT) const;
/// LowerAsmOperandForConstraint - Lower the specified operand into the Ops