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Use MCSymbols for FastISel.

Browse Source 
The summary is that it moves the mangling earlier and replaces a few
calls to .addExternalSymbol with addSym.

I originally wanted to replace all the uses of addExternalSymbol with
addSym, but noticed it was a lot of work and doesn't need to be done
all at once.

llvm-svn: 240395
This commit is contained in:
Rafael Espindola 2015-06-23 12:21:54 +00:00
parent a174e575c4
commit 5613e38017
12 changed files with 96 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
include/llvm/CodeGen/FastISel.h
View File

@ -69,7 +69,7 @@ public:
unsigned NumFixedArgs;
CallingConv::ID CallConv;
const Value *Callee;
const char *SymName;
MCSymbol *Symbol;
ArgListTy Args;
ImmutableCallSite *CS;
MachineInstr *Call;
@ -88,7 +88,7 @@ public:
: RetTy(nullptr), RetSExt(false), RetZExt(false), IsVarArg(false),
IsInReg(false), DoesNotReturn(false), IsReturnValueUsed(true),
IsTailCall(false), NumFixedArgs(-1), CallConv(CallingConv::C),
Callee(nullptr), SymName(nullptr), CS(nullptr), Call(nullptr),
Callee(nullptr), Symbol(nullptr), CS(nullptr), Call(nullptr),
ResultReg(0), NumResultRegs(0), IsPatchPoint(false) {}
CallLoweringInfo &setCallee(Type *ResultTy, FunctionType *FuncTy,
@ -114,12 +114,12 @@ public:
}
CallLoweringInfo &setCallee(Type *ResultTy, FunctionType *FuncTy,
const char *Target, ArgListTy &&ArgsList,
MCSymbol *Target, ArgListTy &&ArgsList,
ImmutableCallSite &Call,
unsigned FixedArgs = ~0U) {
RetTy = ResultTy;
Callee = Call.getCalledValue();
SymName = Target;
Symbol = Target;
IsInReg = Call.paramHasAttr(0, Attribute::InReg);
DoesNotReturn = Call.doesNotReturn();
@ -148,11 +148,16 @@ public:
return *this;
}
CallLoweringInfo &setCallee(CallingConv::ID CC, Type *ResultTy,
CallLoweringInfo &setCallee(const DataLayout &DL, MCContext &Ctx,
CallingConv::ID CC, Type *ResultTy,
const char *Target, ArgListTy &&ArgsList,
unsigned FixedArgs = ~0U);
CallLoweringInfo &setCallee(CallingConv::ID CC, Type *ResultTy,
MCSymbol *Target, ArgListTy &&ArgsList,
unsigned FixedArgs = ~0U) {
RetTy = ResultTy;
SymName = Target;
Symbol = Target;
CallConv = CC;
Args = std::move(ArgsList);
NumFixedArgs = (FixedArgs == ~0U) ? Args.size() : FixedArgs;
@ -504,7 +509,9 @@ protected:
CmpInst::Predicate optimizeCmpPredicate(const CmpInst *CI) const;
bool lowerCallTo(const CallInst *CI, const char *SymName, unsigned NumArgs);
bool lowerCallTo(const CallInst *CI, MCSymbol *Symbol, unsigned NumArgs);
bool lowerCallTo(const CallInst *CI, const char *SymbolName,
unsigned NumArgs);
bool lowerCallTo(CallLoweringInfo &CLI);
bool isCommutativeIntrinsic(IntrinsicInst const *II) {

5
include/llvm/CodeGen/MachineInstrBuilder.h
View File

@ -185,8 +185,9 @@ public:
return *this;
}
const MachineInstrBuilder &addSym(MCSymbol *Sym) const {
MI->addOperand(*MF, MachineOperand::CreateMCSymbol(Sym));
const MachineInstrBuilder &addSym(MCSymbol *Sym,
unsigned char TargetFlags = 0) const {
MI->addOperand(*MF, MachineOperand::CreateMCSymbol(Sym, TargetFlags));
return *this;
}

4
include/llvm/CodeGen/MachineOperand.h
View File

@ -705,10 +705,12 @@ public:
return Op;
}
static MachineOperand CreateMCSymbol(MCSymbol *Sym) {
static MachineOperand CreateMCSymbol(MCSymbol *Sym,
unsigned char TargetFlags = 0) {
MachineOperand Op(MachineOperand::MO_MCSymbol);
Op.Contents.Sym = Sym;
Op.setOffset(0);
Op.setTargetFlags(TargetFlags);
return Op;
}

4
include/llvm/IR/Mangler.h
View File

@ -51,6 +51,10 @@ public:
/// Print the appropriate prefix and the specified global variable's name.
/// If the global variable doesn't have a name, this fills in a unique name
/// for the global.
static void getNameWithPrefix(SmallVectorImpl<char> &OutName,
const Twine &GVName, const DataLayout &DL);
void getNameWithPrefix(raw_ostream &OS, const GlobalValue *GV,
bool CannotUsePrivateLabel) const;
void getNameWithPrefix(SmallVectorImpl<char> &OutName, const GlobalValue *GV,

21
lib/CodeGen/SelectionDAG/FastISel.cpp
View File

@ -59,6 +59,7 @@
#include "llvm/IR/GlobalVariable.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/Mangler.h"
#include "llvm/IR/Operator.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
@ -701,6 +702,15 @@ bool FastISel::lowerCallOperands(const CallInst *CI, unsigned ArgIdx,
return lowerCallTo(CLI);
}
FastISel::CallLoweringInfo &FastISel::CallLoweringInfo::setCallee(
const DataLayout &DL, MCContext &Ctx, CallingConv::ID CC, Type *ResultTy,
const char *Target, ArgListTy &&ArgsList, unsigned FixedArgs) {
SmallString<32> MangledName;
Mangler::getNameWithPrefix(MangledName, Target, DL);
MCSymbol *Sym = Ctx.getOrCreateSymbol(MangledName);
return setCallee(CC, ResultTy, Sym, std::move(ArgsList), FixedArgs);
}
bool FastISel::selectPatchpoint(const CallInst *I) {
// void|i64 @llvm.experimental.patchpoint.void|i64(i64 <id>,
// i32 <numBytes>,
@ -856,6 +866,15 @@ static AttributeSet getReturnAttrs(FastISel::CallLoweringInfo &CLI) {
bool FastISel::lowerCallTo(const CallInst *CI, const char *SymName,
unsigned NumArgs) {
MCContext &Ctx = MF->getContext();
SmallString<32> MangledName;
Mangler::getNameWithPrefix(MangledName, SymName, DL);
MCSymbol *Sym = Ctx.getOrCreateSymbol(MangledName);
return lowerCallTo(CI, Sym, NumArgs);
}
bool FastISel::lowerCallTo(const CallInst *CI, MCSymbol *Symbol,
unsigned NumArgs) {
ImmutableCallSite CS(CI);
PointerType *PT = cast<PointerType>(CS.getCalledValue()->getType());
@ -880,7 +899,7 @@ bool FastISel::lowerCallTo(const CallInst *CI, const char *SymName,
}
CallLoweringInfo CLI;
CLI.setCallee(RetTy, FTy, SymName, std::move(Args), CS, NumArgs);
CLI.setCallee(RetTy, FTy, Symbol, std::move(Args), CS, NumArgs);
return lowerCallTo(CLI);
}

16
lib/IR/Mangler.cpp
View File

@ -20,7 +20,7 @@
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
static void getNameWithPrefixx(raw_ostream &OS, const Twine &GVName,
static void getNameWithPrefixImpl(raw_ostream &OS, const Twine &GVName,
Mangler::ManglerPrefixTy PrefixTy,
const DataLayout &DL, char Prefix) {
SmallString<256> TmpData;
@ -49,14 +49,22 @@ static void getNameWithPrefixx(raw_ostream &OS, const Twine &GVName,
void Mangler::getNameWithPrefix(raw_ostream &OS, const Twine &GVName,
ManglerPrefixTy PrefixTy) const {
char Prefix = DL->getGlobalPrefix();
return getNameWithPrefixx(OS, GVName, PrefixTy, *DL, Prefix);
return getNameWithPrefixImpl(OS, GVName, PrefixTy, *DL, Prefix);
}
void Mangler::getNameWithPrefix(SmallVectorImpl<char> &OutName,
const Twine &GVName, const DataLayout &DL) {
raw_svector_ostream OS(OutName);
char Prefix = DL.getGlobalPrefix();
return getNameWithPrefixImpl(OS, GVName, Mangler::Default, DL, Prefix);
}
void Mangler::getNameWithPrefix(SmallVectorImpl<char> &OutName,
const Twine &GVName,
ManglerPrefixTy PrefixTy) const {
raw_svector_ostream OS(OutName);
return getNameWithPrefix(OS, GVName, PrefixTy);
char Prefix = DL->getGlobalPrefix();
return getNameWithPrefixImpl(OS, GVName, PrefixTy, *DL, Prefix);
}
static bool hasByteCountSuffix(CallingConv::ID CC) {
@ -132,7 +140,7 @@ void Mangler::getNameWithPrefix(raw_ostream &OS, const GlobalValue *GV,
Prefix = '\0'; // vectorcall functions have no prefix.
}
getNameWithPrefixx(OS, Name, PrefixTy, *DL, Prefix);
getNameWithPrefixImpl(OS, Name, PrefixTy, *DL, Prefix);
if (!MSFunc)
return;

27
lib/Target/AArch64/AArch64FastISel.cpp
View File

@ -36,6 +36,7 @@
#include "llvm/IR/Instructions.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/Operator.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Support/CommandLine.h"
using namespace llvm;
@ -3070,9 +3071,9 @@ bool AArch64FastISel::fastLowerCall(CallLoweringInfo &CLI) {
bool IsTailCall = CLI.IsTailCall;
bool IsVarArg = CLI.IsVarArg;
const Value *Callee = CLI.Callee;
const char *SymName = CLI.SymName;
MCSymbol *Symbol = CLI.Symbol;
if (!Callee && !SymName)
if (!Callee && !Symbol)
return false;
// Allow SelectionDAG isel to handle tail calls.
@ -3134,8 +3135,8 @@ bool AArch64FastISel::fastLowerCall(CallLoweringInfo &CLI) {
if (CM == CodeModel::Small) {
const MCInstrDesc &II = TII.get(Addr.getReg() ? AArch64::BLR : AArch64::BL);
MIB = BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, II);
if (SymName)
MIB.addExternalSymbol(SymName, 0);
if (Symbol)
MIB.addSym(Symbol, 0);
else if (Addr.getGlobalValue())
MIB.addGlobalAddress(Addr.getGlobalValue(), 0, 0);
else if (Addr.getReg()) {
@ -3145,18 +3146,18 @@ bool AArch64FastISel::fastLowerCall(CallLoweringInfo &CLI) {
return false;
} else {
unsigned CallReg = 0;
if (SymName) {
if (Symbol) {
unsigned ADRPReg = createResultReg(&AArch64::GPR64commonRegClass);
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::ADRP),
ADRPReg)
.addExternalSymbol(SymName, AArch64II::MO_GOT | AArch64II::MO_PAGE);
.addSym(Symbol, AArch64II::MO_GOT | AArch64II::MO_PAGE);
CallReg = createResultReg(&AArch64::GPR64RegClass);
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(AArch64::LDRXui),
CallReg)
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
TII.get(AArch64::LDRXui), CallReg)
.addReg(ADRPReg)
.addExternalSymbol(SymName, AArch64II::MO_GOT | AArch64II::MO_PAGEOFF |
AArch64II::MO_NC);
.addSym(Symbol,
AArch64II::MO_GOT | AArch64II::MO_PAGEOFF | AArch64II::MO_NC);
} else if (Addr.getGlobalValue())
CallReg = materializeGV(Addr.getGlobalValue());
else if (Addr.getReg())
@ -3460,7 +3461,8 @@ bool AArch64FastISel::fastLowerIntrinsicCall(const IntrinsicInst *II) {
}
CallLoweringInfo CLI;
CLI.setCallee(TLI.getLibcallCallingConv(LC), II->getType(),
MCContext &Ctx = MF->getContext();
CLI.setCallee(DL, Ctx, TLI.getLibcallCallingConv(LC), II->getType(),
TLI.getLibcallName(LC), std::move(Args));
if (!lowerCallTo(CLI))
return false;
@ -4734,7 +4736,8 @@ bool AArch64FastISel::selectFRem(const Instruction *I) {
}
CallLoweringInfo CLI;
CLI.setCallee(TLI.getLibcallCallingConv(LC), I->getType(),
MCContext &Ctx = MF->getContext();
CLI.setCallee(DL, Ctx, TLI.getLibcallCallingConv(LC), I->getType(),
TLI.getLibcallName(LC), std::move(Args));
if (!lowerCallTo(CLI))
return false;

3
lib/Target/AArch64/AArch64MCInstLower.cpp
View File

@ -187,6 +187,9 @@ bool AArch64MCInstLower::lowerOperand(const MachineOperand &MO,
case MachineOperand::MO_ExternalSymbol:
MCOp = LowerSymbolOperand(MO, GetExternalSymbolSymbol(MO));
break;
case MachineOperand::MO_MCSymbol:
MCOp = LowerSymbolOperand(MO, MO.getMCSymbol());
break;
case MachineOperand::MO_JumpTableIndex:
MCOp = LowerSymbolOperand(MO, Printer.GetJTISymbol(MO.getIndex()));
break;

13
lib/Target/Mips/MipsFastISel.cpp
View File

@ -16,6 +16,7 @@
#include "llvm/IR/GetElementPtrTypeIterator.h"
#include "llvm/IR/GlobalAlias.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Target/TargetInstrInfo.h"
using namespace llvm;
@ -143,7 +144,7 @@ private:
unsigned materializeGV(const GlobalValue *GV, MVT VT);
unsigned materializeInt(const Constant *C, MVT VT);
unsigned materialize32BitInt(int64_t Imm, const TargetRegisterClass *RC);
unsigned materializeExternalCallSym(const char *SynName);
unsigned materializeExternalCallSym(MCSymbol *Syn);
MachineInstrBuilder emitInst(unsigned Opc) {
return BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(Opc));
@ -369,12 +370,12 @@ unsigned MipsFastISel::materializeGV(const GlobalValue *GV, MVT VT) {
return DestReg;
}
unsigned MipsFastISel::materializeExternalCallSym(const char *SymName) {
unsigned MipsFastISel::materializeExternalCallSym(MCSymbol *Sym) {
const TargetRegisterClass *RC = &Mips::GPR32RegClass;
unsigned DestReg = createResultReg(RC);
emitInst(Mips::LW, DestReg)
.addReg(MFI->getGlobalBaseReg())
.addExternalSymbol(SymName, MipsII::MO_GOT);
.addSym(Sym, MipsII::MO_GOT);
return DestReg;
}
@ -1234,7 +1235,7 @@ bool MipsFastISel::fastLowerCall(CallLoweringInfo &CLI) {
bool IsTailCall = CLI.IsTailCall;
bool IsVarArg = CLI.IsVarArg;
const Value *Callee = CLI.Callee;
const char *SymName = CLI.SymName;
MCSymbol *Symbol = CLI.Symbol;
// Allow SelectionDAG isel to handle tail calls.
if (IsTailCall)
@ -1286,8 +1287,8 @@ bool MipsFastISel::fastLowerCall(CallLoweringInfo &CLI) {
// Issue the call.
unsigned DestAddress;
if (SymName)
DestAddress = materializeExternalCallSym(SymName);
if (Symbol)
DestAddress = materializeExternalCallSym(Symbol);
else
DestAddress = materializeGV(Addr.getGlobalValue(), MVT::i32);
emitInst(TargetOpcode::COPY, Mips::T9).addReg(DestAddress);

6
lib/Target/Mips/MipsMCInstLower.cpp
View File

@ -88,6 +88,11 @@ MCOperand MipsMCInstLower::LowerSymbolOperand(const MachineOperand &MO,
Offset += MO.getOffset();
break;
case MachineOperand::MO_MCSymbol:
Symbol = MO.getMCSymbol();
Offset += MO.getOffset();
break;
case MachineOperand::MO_JumpTableIndex:
Symbol = AsmPrinter.GetJTISymbol(MO.getIndex());
break;
@ -141,6 +146,7 @@ MCOperand MipsMCInstLower::LowerOperand(const MachineOperand &MO,
case MachineOperand::MO_MachineBasicBlock:
case MachineOperand::MO_GlobalAddress:
case MachineOperand::MO_ExternalSymbol:
case MachineOperand::MO_MCSymbol:
case MachineOperand::MO_JumpTableIndex:
case MachineOperand::MO_ConstantPoolIndex:
case MachineOperand::MO_BlockAddress:

4
lib/Target/PowerPC/PPCFastISel.cpp
View File

@ -1448,9 +1448,9 @@ bool PPCFastISel::fastLowerCall(CallLoweringInfo &CLI) {
bool IsTailCall = CLI.IsTailCall;
bool IsVarArg = CLI.IsVarArg;
const Value *Callee = CLI.Callee;
const char *SymName = CLI.SymName;
const MCSymbol *Symbol = CLI.Symbol;
if (!Callee && !SymName)
if (!Callee && !Symbol)
return false;
// Allow SelectionDAG isel to handle tail calls.

7
lib/Target/X86/X86FastISel.cpp
View File

@ -38,6 +38,7 @@
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/Operator.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Target/TargetOptions.h"
using namespace llvm;
@ -2821,7 +2822,7 @@ bool X86FastISel::fastLowerCall(CallLoweringInfo &CLI) {
bool &IsTailCall = CLI.IsTailCall;
bool IsVarArg = CLI.IsVarArg;
const Value *Callee = CLI.Callee;
const char *SymName = CLI.SymName;
MCSymbol *Symbol = CLI.Symbol;
bool Is64Bit = Subtarget->is64Bit();
bool IsWin64 = Subtarget->isCallingConvWin64(CC);
@ -3117,8 +3118,8 @@ bool X86FastISel::fastLowerCall(CallLoweringInfo &CLI) {
}
MIB = BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, TII.get(CallOpc));
if (SymName)
MIB.addExternalSymbol(SymName, OpFlags);
if (Symbol)
MIB.addSym(Symbol, OpFlags);
else
MIB.addGlobalAddress(GV, 0, OpFlags);
}