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Add the SubRegIndex TableGen class.

Browse Source 
This is the beginning of purely symbolic subregister indices, but we need a bit
of jiggling before the explicit numeric indices can be completely removed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104492 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2010-05-24 14:48:12 +00:00
parent 3816c25fdc
commit 73ea7bf450
11 changed files with 94 additions and 57 deletions
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8
include/llvm/Target/Target.td
View File

@ -21,6 +21,14 @@ include "llvm/Intrinsics.td"
class RegisterClass; // Forward def
class SubRegIndex {
string Namespace = "";
// This explicit numbering is going away after RegisterClass::SubRegClassList
// is replaced.
int NumberHack;
}
// Register - You should define one instance of this class for each register
// in the target machine. String n will become the "name" of the register.
class Register<string n> {

30
lib/Target/Blackfin/BlackfinInstrInfo.td
View File

@ -301,9 +301,9 @@ def LOAD32p_8z: F1<(outs D:$dst), (ins P:$ptr),
def : Pat<(i32 (extloadi8 P:$ptr)), (LOAD32p_8z P:$ptr)>;
def : Pat<(i16 (extloadi8 P:$ptr)),
(EXTRACT_SUBREG (LOAD32p_8z P:$ptr), bfin_subreg_lo16)>;
(EXTRACT_SUBREG (LOAD32p_8z P:$ptr), lo16)>;
def : Pat<(i16 (zextloadi8 P:$ptr)),
(EXTRACT_SUBREG (LOAD32p_8z P:$ptr), bfin_subreg_lo16)>;
(EXTRACT_SUBREG (LOAD32p_8z P:$ptr), lo16)>;
def LOAD32p_imm16_8z: F1<(outs D:$dst), (ins P:$ptr, i32imm:$off),
"$dst = b[$ptr + $off] (z);",
@ -313,17 +313,17 @@ def : Pat<(i32 (extloadi8 (add P:$ptr, imm16:$off))),
(LOAD32p_imm16_8z P:$ptr, imm:$off)>;
def : Pat<(i16 (extloadi8 (add P:$ptr, imm16:$off))),
(EXTRACT_SUBREG (LOAD32p_imm16_8z P:$ptr, imm:$off),
bfin_subreg_lo16)>;
lo16)>;
def : Pat<(i16 (zextloadi8 (add P:$ptr, imm16:$off))),
(EXTRACT_SUBREG (LOAD32p_imm16_8z P:$ptr, imm:$off),
bfin_subreg_lo16)>;
lo16)>;
def LOAD32p_8s: F1<(outs D:$dst), (ins P:$ptr),
"$dst = b[$ptr] (x);",
[(set D:$dst, (sextloadi8 P:$ptr))]>;
def : Pat<(i16 (sextloadi8 P:$ptr)),
(EXTRACT_SUBREG (LOAD32p_8s P:$ptr), bfin_subreg_lo16)>;
(EXTRACT_SUBREG (LOAD32p_8s P:$ptr), lo16)>;
def LOAD32p_imm16_8s: F1<(outs D:$dst), (ins P:$ptr, i32imm:$off),
"$dst = b[$ptr + $off] (x);",
@ -331,7 +331,7 @@ def LOAD32p_imm16_8s: F1<(outs D:$dst), (ins P:$ptr, i32imm:$off),
def : Pat<(i16 (sextloadi8 (add P:$ptr, imm16:$off))),
(EXTRACT_SUBREG (LOAD32p_imm16_8s P:$ptr, imm:$off),
bfin_subreg_lo16)>;
lo16)>;
// Memory loads without patterns
let mayLoad = 1 in {
@ -468,16 +468,16 @@ def STORE32i_post: F1<(outs I:$ptr_wb), (ins D:$val, I:$ptr, M:$off),
def : Pat<(truncstorei16 D:$val, PI:$ptr),
(STORE16pi (EXTRACT_SUBREG (i32 (COPY_TO_REGCLASS D:$val, D)),
bfin_subreg_lo16), PI:$ptr)>;
lo16), PI:$ptr)>;
def : Pat<(truncstorei16 (srl D:$val, (i16 16)), PI:$ptr),
(STORE16pi (EXTRACT_SUBREG (i32 (COPY_TO_REGCLASS D:$val, D)),
bfin_subreg_hi16), PI:$ptr)>;
hi16), PI:$ptr)>;
def : Pat<(truncstorei8 D16L:$val, P:$ptr),
(STORE8p (INSERT_SUBREG (i32 (IMPLICIT_DEF)),
(i16 (COPY_TO_REGCLASS D16L:$val, D16L)),
bfin_subreg_lo16),
lo16),
P:$ptr)>;
//===----------------------------------------------------------------------===//
@ -516,19 +516,19 @@ def : Pat<(sext_inreg D16L:$src, i8),
(EXTRACT_SUBREG (MOVEsext8
(INSERT_SUBREG (i32 (IMPLICIT_DEF)),
D16L:$src,
bfin_subreg_lo16)),
bfin_subreg_lo16)>;
lo16)),
lo16)>;
def : Pat<(sext_inreg D:$src, i16),
(MOVEsext (EXTRACT_SUBREG D:$src, bfin_subreg_lo16))>;
(MOVEsext (EXTRACT_SUBREG D:$src, lo16))>;
def : Pat<(and D:$src, 0xffff),
(MOVEzext (EXTRACT_SUBREG D:$src, bfin_subreg_lo16))>;
(MOVEzext (EXTRACT_SUBREG D:$src, lo16))>;
def : Pat<(i32 (anyext D16L:$src)),
(INSERT_SUBREG (i32 (IMPLICIT_DEF)),
(i16 (COPY_TO_REGCLASS D16L:$src, D16L)),
bfin_subreg_lo16)>;
lo16)>;
// TODO Dreg = Dreg_byte (X/Z)
@ -859,4 +859,4 @@ def : Pat<(BfinCall (i32 tglobaladdr:$dst)),
def : Pat<(BfinCall (i32 texternalsym:$dst)),
(CALLa texternalsym:$dst)>;
def : Pat<(i16 (trunc D:$src)),
(EXTRACT_SUBREG (i32 (COPY_TO_REGCLASS D:$src, D)), bfin_subreg_lo16)>;
(EXTRACT_SUBREG (i32 (COPY_TO_REGCLASS D:$src, D)), lo16)>;

4
lib/Target/Blackfin/BlackfinRegisterInfo.cpp
View File

@ -177,11 +177,11 @@ void BlackfinRegisterInfo::loadConstant(MachineBasicBlock &MBB,
// We must split into halves
BuildMI(MBB, I, DL,
TII.get(BF::LOAD16i), getSubReg(Reg, bfin_subreg_hi16))
TII.get(BF::LOAD16i), getSubReg(Reg, BF::hi16))
.addImm((value >> 16) & 0xffff)
.addReg(Reg, RegState::ImplicitDefine);
BuildMI(MBB, I, DL,
TII.get(BF::LOAD16i), getSubReg(Reg, bfin_subreg_lo16))
TII.get(BF::LOAD16i), getSubReg(Reg, BF::lo16))
.addImm(value & 0xffff)
.addReg(Reg, RegState::ImplicitKill)
.addReg(Reg, RegState::ImplicitDefine);

7
lib/Target/Blackfin/BlackfinRegisterInfo.h
View File

@ -24,13 +24,6 @@ namespace llvm {
class TargetInstrInfo;
class Type;
// Subregister indices, keep in sync with BlackfinRegisterInfo.td
enum BfinSubregIdx {
bfin_subreg_lo16 = 1,
bfin_subreg_hi16 = 2,
bfin_subreg_lo32 = 3
};
struct BlackfinRegisterInfo : public BlackfinGenRegisterInfo {
BlackfinSubtarget &Subtarget;
const TargetInstrInfo &TII;

20
lib/Target/Blackfin/BlackfinRegisterInfo.td
View File

@ -11,8 +11,17 @@
// Declarations that describe the Blackfin register file
//===----------------------------------------------------------------------===//
// Registers are identified with 3-bit group and 3-bit ID numbers.
// Subregs are:
// 1: .L
// 2: .H
// 3: .W (32 low bits of 40-bit accu)
let Namespace = "BF" in {
def lo16 : SubRegIndex { let NumberHack = 1; }
def hi16 : SubRegIndex { let NumberHack = 2; }
def lo32 : SubRegIndex { let NumberHack = 3; }
}
// Registers are identified with 3-bit group and 3-bit ID numbers.
class BlackfinReg<string n> : Register<n> {
field bits<3> Group;
field bits<3> Num;
@ -182,15 +191,6 @@ def LC1 : Ri<6, 3, "lc1">, DwarfRegNum<[47]>;
def LB0 : Ri<6, 2, "lb0">, DwarfRegNum<[48]>;
def LB1 : Ri<6, 5, "lb1">, DwarfRegNum<[49]>;
// Subregs are:
// 1: .L
// 2: .H
// 3: .W (32 low bits of 40-bit accu)
// Keep in sync with enum in BlackfinRegisterInfo.h
def bfin_subreg_lo16 : PatLeaf<(i32 1)>;
def bfin_subreg_hi16 : PatLeaf<(i32 2)>;
def bfin_subreg_32bit : PatLeaf<(i32 3)>;
def : SubRegSet<1,
[R0, R1, R2, R3, R4, R5, R6, R7,
P0, P1, P2, P3, P4, P5, SP, FP,

4
lib/Target/X86/X86InstrInfo.cpp
View File

@ -2483,9 +2483,9 @@ X86InstrInfo::foldMemoryOperandImpl(MachineFunction &MF,
unsigned DstReg = NewMI->getOperand(0).getReg();
if (TargetRegisterInfo::isPhysicalRegister(DstReg))
NewMI->getOperand(0).setReg(RI.getSubReg(DstReg,
4/*x86_subreg_32bit*/));
X86::x86_subreg_32bit));
else
NewMI->getOperand(0).setSubReg(4/*x86_subreg_32bit*/);
NewMI->getOperand(0).setSubReg(X86::x86_subreg_32bit);
}
return NewMI;
}

20
lib/Target/X86/X86RegisterInfo.td
View File

@ -18,6 +18,17 @@
//
let Namespace = "X86" in {
// Subregister indices.
def x86_subreg_8bit : SubRegIndex { let NumberHack = 1; }
def x86_subreg_8bit_hi : SubRegIndex { let NumberHack = 2; }
def x86_subreg_16bit : SubRegIndex { let NumberHack = 3; }
def x86_subreg_32bit : SubRegIndex { let NumberHack = 4; }
def x86_subreg_ss : SubRegIndex { let NumberHack = 1; }
def x86_subreg_sd : SubRegIndex { let NumberHack = 2; }
def x86_subreg_xmm : SubRegIndex { let NumberHack = 3; }
// In the register alias definitions below, we define which registers alias
// which others. We only specify which registers the small registers alias,
// because the register file generator is smart enough to figure out that
@ -224,15 +235,6 @@ let Namespace = "X86" in {
// sub registers for each register.
//
def x86_subreg_8bit : PatLeaf<(i32 1)>;
def x86_subreg_8bit_hi : PatLeaf<(i32 2)>;
def x86_subreg_16bit : PatLeaf<(i32 3)>;
def x86_subreg_32bit : PatLeaf<(i32 4)>;
def x86_subreg_ss : PatLeaf<(i32 1)>;
def x86_subreg_sd : PatLeaf<(i32 2)>;
def x86_subreg_xmm : PatLeaf<(i32 3)>;
def : SubRegSet<1, [AX, CX, DX, BX, SP, BP, SI, DI,
R8W, R9W, R10W, R11W, R12W, R13W, R14W, R15W],
[AL, CL, DL, BL, SPL, BPL, SIL, DIL,

5
utils/TableGen/CodeGenDAGPatterns.cpp
View File

@ -1057,6 +1057,11 @@ static EEVT::TypeSet getImplicitType(Record *R, unsigned ResNo,
const CodeGenTarget &T = TP.getDAGPatterns().getTargetInfo();
return EEVT::TypeSet(T.getRegisterVTs(R));
}
if (R->isSubClassOf("SubRegIndex")) {
assert(ResNo == 0 && "SubRegisterIndices only produce one result!");
return EEVT::TypeSet();
}
if (R->isSubClassOf("ValueType") || R->isSubClassOf("CondCode")) {
assert(ResNo == 0 && "This node only has one result!");

9
utils/TableGen/DAGISelMatcherGen.cpp
View File

@ -224,6 +224,7 @@ void MatcherGen::EmitLeafMatchCode(const TreePatternNode *N) {
if (// Handle register references. Nothing to do here, they always match.
LeafRec->isSubClassOf("RegisterClass") ||
LeafRec->isSubClassOf("PointerLikeRegClass") ||
LeafRec->isSubClassOf("SubRegIndex") ||
// Place holder for SRCVALUE nodes. Nothing to do here.
LeafRec->getName() == "srcvalue")
return;
@ -597,6 +598,14 @@ void MatcherGen::EmitResultLeafAsOperand(const TreePatternNode *N,
ResultOps.push_back(NextRecordedOperandNo++);
return;
}
// Handle a subregister index. This is used for INSERT_SUBREG etc.
if (DI->getDef()->isSubClassOf("SubRegIndex")) {
std::string Value = getQualifiedName(DI->getDef());
AddMatcher(new EmitStringIntegerMatcher(Value, MVT::i32));
ResultOps.push_back(NextRecordedOperandNo++);
return;
}
}
errs() << "unhandled leaf node: \n";

19
utils/TableGen/FastISelEmitter.cpp
View File

@ -31,7 +31,7 @@ namespace {
struct InstructionMemo {
std::string Name;
const CodeGenRegisterClass *RC;
unsigned char SubRegNo;
std::string SubRegNo;
std::vector<std::string>* PhysRegs;
};
@ -278,7 +278,7 @@ void FastISelMap::CollectPatterns(CodeGenDAGPatterns &CGP) {
// For now, ignore instructions where the first operand is not an
// output register.
const CodeGenRegisterClass *DstRC = 0;
unsigned SubRegNo = ~0;
std::string SubRegNo;
if (Op->getName() != "EXTRACT_SUBREG") {
Record *Op0Rec = II.OperandList[0].Rec;
if (!Op0Rec->isSubClassOf("RegisterClass"))
@ -287,8 +287,11 @@ void FastISelMap::CollectPatterns(CodeGenDAGPatterns &CGP) {
if (!DstRC)
continue;
} else {
SubRegNo = static_cast<IntInit*>(
Dst->getChild(1)->getLeafValue())->getValue();
DefInit *SR = dynamic_cast<DefInit*>(Dst->getChild(1)->getLeafValue());
if (SR)
SubRegNo = getQualifiedName(SR->getDef());
else
SubRegNo = Dst->getChild(1)->getLeafValue()->getAsString();
}
// Inspect the pattern.
@ -437,7 +440,7 @@ void FastISelMap::PrintFunctionDefinitions(raw_ostream &OS) {
}
OS << " return FastEmitInst_";
if (Memo.SubRegNo == (unsigned char)~0) {
if (Memo.SubRegNo.empty()) {
Operands.PrintManglingSuffix(OS, *Memo.PhysRegs);
OS << "(" << InstNS << Memo.Name << ", ";
OS << InstNS << Memo.RC->getName() << "RegisterClass";
@ -448,7 +451,7 @@ void FastISelMap::PrintFunctionDefinitions(raw_ostream &OS) {
} else {
OS << "extractsubreg(" << getName(RetVT);
OS << ", Op0, Op0IsKill, ";
OS << (unsigned)Memo.SubRegNo;
OS << Memo.SubRegNo;
OS << ");\n";
}
@ -532,7 +535,7 @@ void FastISelMap::PrintFunctionDefinitions(raw_ostream &OS) {
OS << " return FastEmitInst_";
if (Memo.SubRegNo == (unsigned char)~0) {
if (Memo.SubRegNo.empty()) {
Operands.PrintManglingSuffix(OS, *Memo.PhysRegs);
OS << "(" << InstNS << Memo.Name << ", ";
OS << InstNS << Memo.RC->getName() << "RegisterClass";
@ -542,7 +545,7 @@ void FastISelMap::PrintFunctionDefinitions(raw_ostream &OS) {
OS << ");\n";
} else {
OS << "extractsubreg(RetVT, Op0, Op0IsKill, ";
OS << (unsigned)Memo.SubRegNo;
OS << Memo.SubRegNo;
OS << ");\n";
}

25
utils/TableGen/RegisterInfoEmitter.cpp
View File

@ -35,14 +35,31 @@ void RegisterInfoEmitter::runEnums(raw_ostream &OS) {
if (!Namespace.empty())
OS << "namespace " << Namespace << " {\n";
OS << " enum {\n NoRegister,\n";
OS << "enum {\n NoRegister,\n";
for (unsigned i = 0, e = Registers.size(); i != e; ++i)
OS << " " << Registers[i].getName() << ", \t// " << i+1 << "\n";
OS << " NUM_TARGET_REGS \t// " << Registers.size()+1 << "\n";
OS << " };\n";
OS << " " << Registers[i].getName() << ", \t// " << i+1 << "\n";
OS << " NUM_TARGET_REGS \t// " << Registers.size()+1 << "\n";
OS << "};\n";
if (!Namespace.empty())
OS << "}\n";
const std::vector<Record*> SubRegIndices =
Records.getAllDerivedDefinitions("SubRegIndex");
if (!SubRegIndices.empty()) {
OS << "\n// Subregister indices\n";
Namespace = SubRegIndices[0]->getValueAsString("Namespace");
if (!Namespace.empty())
OS << "namespace " << Namespace << " {\n";
OS << "enum {\n NoSubRegister,\n";
for (unsigned i = 0, e = SubRegIndices.size(); i != e; ++i)
OS << " " << SubRegIndices[i]->getName() << " = "
<< SubRegIndices[i]->getValueAsInt("NumberHack") << ",\n";
OS << " NUM_TARGET_SUBREGS = " << SubRegIndices.size()+1 << "\n";
OS << "};\n";
if (!Namespace.empty())
OS << "}\n";
}
OS << "} // End llvm namespace \n";
}