From: Dan Gohman Date: Tue, 12 Jan 2016 20:30:51 +0000 (+0000) Subject: [WebAssembly] Introduce a WebAssemblyTargetStreamer class. X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=commitdiff_plain;h=f49a61441da5a12ade9cee64f5761c583fbd62fb [WebAssembly] Introduce a WebAssemblyTargetStreamer class. Refactor .param, .result, .local, and .endfunc, as directives, using the proper MCTargetStreamer mechanism, rather than fake instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@257511 91177308-0d34-0410-b5e6-96231b3b80d8 --- diff --git a/lib/Target/WebAssembly/InstPrinter/WebAssemblyInstPrinter.cpp b/lib/Target/WebAssembly/InstPrinter/WebAssemblyInstPrinter.cpp index 60e52015242..9a95150cb55 100644 --- a/lib/Target/WebAssembly/InstPrinter/WebAssemblyInstPrinter.cpp +++ b/lib/Target/WebAssembly/InstPrinter/WebAssemblyInstPrinter.cpp @@ -151,12 +151,11 @@ void WebAssemblyInstPrinter::printOperand(const MCInst *MI, unsigned OpNo, WebAssemblyII::VariableOpIsImmediate)) && "WebAssemblyII::VariableOpIsImmediate should be set for " "variable_ops immediate ops"); - if (MII.get(MI->getOpcode()).TSFlags & - WebAssemblyII::VariableOpImmediateIsType) - // The immediates represent types. - O << WebAssembly::TypeToString(MVT::SimpleValueType(Op.getImm())); - else - O << Op.getImm(); + // TODO: (MII.get(MI->getOpcode()).TSFlags & + // WebAssemblyII::VariableOpImmediateIsLabel) + // can tell us whether this is an immediate referencing a label in the + // control flow stack, and it may be nice to pretty-print. + O << Op.getImm(); } else if (Op.isFPImm()) { assert((OpNo < MII.get(MI->getOpcode()).getNumOperands() || MII.get(MI->getOpcode()).TSFlags == 0) && diff --git a/lib/Target/WebAssembly/MCTargetDesc/CMakeLists.txt b/lib/Target/WebAssembly/MCTargetDesc/CMakeLists.txt index c8d1d821861..fd41df7b963 100644 --- a/lib/Target/WebAssembly/MCTargetDesc/CMakeLists.txt +++ b/lib/Target/WebAssembly/MCTargetDesc/CMakeLists.txt @@ -4,4 +4,5 @@ add_llvm_library(LLVMWebAssemblyDesc WebAssemblyMCAsmInfo.cpp WebAssemblyMCCodeEmitter.cpp WebAssemblyMCTargetDesc.cpp + WebAssemblyTargetStreamer.cpp ) diff --git a/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCTargetDesc.cpp b/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCTargetDesc.cpp index 6436fd84307..160efdbfe1a 100644 --- a/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCTargetDesc.cpp +++ b/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCTargetDesc.cpp @@ -15,10 +15,10 @@ #include "WebAssemblyMCTargetDesc.h" #include "InstPrinter/WebAssemblyInstPrinter.h" #include "WebAssemblyMCAsmInfo.h" +#include "WebAssemblyTargetStreamer.h" #include "llvm/MC/MCCodeGenInfo.h" #include "llvm/MC/MCInstrInfo.h" #include "llvm/MC/MCRegisterInfo.h" -#include "llvm/MC/MCStreamer.h" #include "llvm/MC/MCSubtargetInfo.h" #include "llvm/Support/ErrorHandling.h" #include "llvm/Support/TargetRegistry.h" @@ -46,12 +46,6 @@ static MCInstrInfo *createMCInstrInfo() { return X; } -static MCStreamer *createMCStreamer(const Triple & /*T*/, MCContext &Ctx, - MCAsmBackend &MAB, raw_pwrite_stream &OS, - MCCodeEmitter *Emitter, bool RelaxAll) { - return createELFStreamer(Ctx, MAB, OS, Emitter, RelaxAll); -} - static MCInstPrinter *createMCInstPrinter(const Triple & /*T*/, unsigned SyntaxVariant, const MCAsmInfo &MAI, @@ -78,6 +72,18 @@ static MCSubtargetInfo *createMCSubtargetInfo(const Triple &TT, StringRef CPU, return createWebAssemblyMCSubtargetInfoImpl(TT, CPU, FS); } +static MCTargetStreamer * +createObjectTargetStreamer(MCStreamer &S, const MCSubtargetInfo & /*STI*/) { + return new WebAssemblyTargetELFStreamer(S); +} + +static MCTargetStreamer *createAsmTargetStreamer(MCStreamer &S, + formatted_raw_ostream &OS, + MCInstPrinter * /*InstPrint*/, + bool /*isVerboseAsm*/) { + return new WebAssemblyTargetAsmStreamer(S, OS); +} + // Force static initialization. extern "C" void LLVMInitializeWebAssemblyTargetMC() { for (Target *T : {&TheWebAssemblyTarget32, &TheWebAssemblyTarget64}) { @@ -87,9 +93,6 @@ extern "C" void LLVMInitializeWebAssemblyTargetMC() { // Register the MC instruction info. TargetRegistry::RegisterMCInstrInfo(*T, createMCInstrInfo); - // Register the object streamer. - TargetRegistry::RegisterELFStreamer(*T, createMCStreamer); - // Register the MCInstPrinter. TargetRegistry::RegisterMCInstPrinter(*T, createMCInstPrinter); @@ -101,5 +104,11 @@ extern "C" void LLVMInitializeWebAssemblyTargetMC() { // Register the MC subtarget info. TargetRegistry::RegisterMCSubtargetInfo(*T, createMCSubtargetInfo); + + // Register the object target streamer. + TargetRegistry::RegisterObjectTargetStreamer(*T, + createObjectTargetStreamer); + // Register the asm target streamer. + TargetRegistry::RegisterAsmTargetStreamer(*T, createAsmTargetStreamer); } } diff --git a/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCTargetDesc.h b/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCTargetDesc.h index 7c4fb6c3c59..9bac4f82822 100644 --- a/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCTargetDesc.h +++ b/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCTargetDesc.h @@ -48,19 +48,26 @@ enum OperandType { /// Floating-point immediate. OPERAND_FPIMM }; + +/// WebAssembly-specific directive identifiers. +enum Directive { + // FIXME: This is not the real binary encoding. + DotParam = UINT64_MAX - 0, ///< .param + DotResult = UINT64_MAX - 1, ///< .result + DotLocal = UINT64_MAX - 2, ///< .local + DotEndFunc = UINT64_MAX - 3, ///< .endfunc +}; + } // end namespace WebAssembly namespace WebAssemblyII { enum { // For variadic instructions, this flag indicates whether an operand // in the variable_ops range is an immediate value. - VariableOpIsImmediate = (1 << 0), - // For immediate values in the variable_ops range, this flag indicates - // whether the value represents a type. - VariableOpImmediateIsType = (1 << 1), + VariableOpIsImmediate = (1 << 0), // For immediate values in the variable_ops range, this flag indicates // whether the value represents a control-flow label. - VariableOpImmediateIsLabel = (1 << 2), + VariableOpImmediateIsLabel = (1 << 1), }; } // end namespace WebAssemblyII diff --git a/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyTargetStreamer.cpp b/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyTargetStreamer.cpp new file mode 100644 index 00000000000..1d2822869a1 --- /dev/null +++ b/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyTargetStreamer.cpp @@ -0,0 +1,94 @@ +//==-- WebAssemblyTargetStreamer.cpp - WebAssembly Target Streamer Methods --=// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +/// +/// \file +/// \brief This file defines WebAssembly-specific target streamer classes. +/// These are for implementing support for target-specific assembly directives. +/// +//===----------------------------------------------------------------------===// + +#include "WebAssemblyTargetStreamer.h" +#include "InstPrinter/WebAssemblyInstPrinter.h" +#include "WebAssemblyMCTargetDesc.h" +#include "WebAssemblyTargetObjectFile.h" +#include "llvm/MC/MCContext.h" +#include "llvm/MC/MCSectionELF.h" +#include "llvm/MC/MCSubtargetInfo.h" +#include "llvm/MC/MCSymbolELF.h" +#include "llvm/Support/CommandLine.h" +#include "llvm/Support/ELF.h" +#include "llvm/Support/ErrorHandling.h" +#include "llvm/Support/FormattedStream.h" +using namespace llvm; + +WebAssemblyTargetStreamer::WebAssemblyTargetStreamer(MCStreamer &S) + : MCTargetStreamer(S) {} + +WebAssemblyTargetAsmStreamer::WebAssemblyTargetAsmStreamer( + MCStreamer &S, formatted_raw_ostream &OS) + : WebAssemblyTargetStreamer(S), OS(OS) {} + +WebAssemblyTargetELFStreamer::WebAssemblyTargetELFStreamer(MCStreamer &S) + : WebAssemblyTargetStreamer(S) {} + +static void PrintTypes(formatted_raw_ostream &OS, ArrayRef Types) { + bool First = true; + for (MVT Type : Types) { + if (First) + First = false; + else + OS << ", "; + OS << WebAssembly::TypeToString(Type); + } + OS << '\n'; +} + +void WebAssemblyTargetAsmStreamer::emitParam(ArrayRef Types) { + OS << "\t.param \t"; + PrintTypes(OS, Types); +} + +void WebAssemblyTargetAsmStreamer::emitResult(ArrayRef Types) { + OS << "\t.result \t"; + PrintTypes(OS, Types); +} + +void WebAssemblyTargetAsmStreamer::emitLocal(ArrayRef Types) { + OS << "\t.local \t"; + PrintTypes(OS, Types); +} + +void WebAssemblyTargetAsmStreamer::emitEndFunc() { OS << "\t.endfunc\n"; } + +// FIXME: What follows is not the real binary encoding. + +static void EncodeTypes(MCStreamer &Streamer, ArrayRef Types) { + Streamer.EmitIntValue(Types.size(), sizeof(uint64_t)); + for (MVT Type : Types) + Streamer.EmitIntValue(Type.SimpleTy, sizeof(uint64_t)); +} + +void WebAssemblyTargetELFStreamer::emitParam(ArrayRef Types) { + Streamer.EmitIntValue(WebAssembly::DotParam, sizeof(uint64_t)); + EncodeTypes(Streamer, Types); +} + +void WebAssemblyTargetELFStreamer::emitResult(ArrayRef Types) { + Streamer.EmitIntValue(WebAssembly::DotResult, sizeof(uint64_t)); + EncodeTypes(Streamer, Types); +} + +void WebAssemblyTargetELFStreamer::emitLocal(ArrayRef Types) { + Streamer.EmitIntValue(WebAssembly::DotLocal, sizeof(uint64_t)); + EncodeTypes(Streamer, Types); +} + +void WebAssemblyTargetELFStreamer::emitEndFunc() { + Streamer.EmitIntValue(WebAssembly::DotEndFunc, sizeof(uint64_t)); +} diff --git a/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyTargetStreamer.h b/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyTargetStreamer.h new file mode 100644 index 00000000000..64334b45189 --- /dev/null +++ b/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyTargetStreamer.h @@ -0,0 +1,67 @@ +//==-- WebAssemblyTargetStreamer.h - WebAssembly Target Streamer -*- C++ -*-==// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +/// +/// \file +/// \brief This file declares WebAssembly-specific target streamer classes. +/// These are for implementing support for target-specific assembly directives. +/// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_LIB_TARGET_WEBASSEMBLY_MCTARGETDESC_WEBASSEMBLYTARGETSTREAMER_H +#define LLVM_LIB_TARGET_WEBASSEMBLY_MCTARGETDESC_WEBASSEMBLYTARGETSTREAMER_H + +#include "llvm/MC/MCStreamer.h" + +namespace llvm { + +class MCELFStreamer; + +/// WebAssembly-specific streamer interface, to implement support +/// WebAssembly-specific assembly directives. +class WebAssemblyTargetStreamer : public MCTargetStreamer { +public: + explicit WebAssemblyTargetStreamer(MCStreamer &S); + + /// .param + virtual void emitParam(ArrayRef Types) = 0; + /// .result + virtual void emitResult(ArrayRef Types) = 0; + /// .local + virtual void emitLocal(ArrayRef Types) = 0; + /// .endfunc + virtual void emitEndFunc() = 0; +}; + +/// This part is for ascii assembly output +class WebAssemblyTargetAsmStreamer final : public WebAssemblyTargetStreamer { + formatted_raw_ostream &OS; + +public: + WebAssemblyTargetAsmStreamer(MCStreamer &S, formatted_raw_ostream &OS); + + void emitParam(ArrayRef Types) override; + void emitResult(ArrayRef Types) override; + void emitLocal(ArrayRef Types) override; + void emitEndFunc() override; +}; + +/// This part is for ELF object output +class WebAssemblyTargetELFStreamer final : public WebAssemblyTargetStreamer { +public: + explicit WebAssemblyTargetELFStreamer(MCStreamer &S); + + void emitParam(ArrayRef Types) override; + void emitResult(ArrayRef Types) override; + void emitLocal(ArrayRef Types) override; + void emitEndFunc() override; +}; + +} // end namespace llvm + +#endif diff --git a/lib/Target/WebAssembly/WebAssemblyAsmPrinter.cpp b/lib/Target/WebAssembly/WebAssemblyAsmPrinter.cpp index 6a25c043c07..45ac99d90ed 100644 --- a/lib/Target/WebAssembly/WebAssemblyAsmPrinter.cpp +++ b/lib/Target/WebAssembly/WebAssemblyAsmPrinter.cpp @@ -17,6 +17,7 @@ #include "WebAssembly.h" #include "InstPrinter/WebAssemblyInstPrinter.h" #include "MCTargetDesc/WebAssemblyMCTargetDesc.h" +#include "MCTargetDesc/WebAssemblyTargetStreamer.h" #include "WebAssemblyMCInstLower.h" #include "WebAssemblyMachineFunctionInfo.h" #include "WebAssemblyRegisterInfo.h" @@ -69,6 +70,7 @@ private: void EmitJumpTableInfo() override; void EmitConstantPool() override; void EmitFunctionBodyStart() override; + void EmitFunctionBodyEnd() override; void EmitInstruction(const MachineInstr *MI) override; const MCExpr *lowerConstant(const Constant *CV) override; bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo, @@ -81,6 +83,7 @@ private: MVT getRegType(unsigned RegNo) const; const char *toString(MVT VT) const; std::string regToString(const MachineOperand &MO); + WebAssemblyTargetStreamer *getTargetStreamer(); }; } // end anonymous namespace @@ -102,6 +105,10 @@ MVT WebAssemblyAsmPrinter::getRegType(unsigned RegNo) const { return MVT::Other; } +const char *WebAssemblyAsmPrinter::toString(MVT VT) const { + return WebAssembly::TypeToString(VT); +} + std::string WebAssemblyAsmPrinter::regToString(const MachineOperand &MO) { unsigned RegNo = MO.getReg(); assert(TargetRegisterInfo::isVirtualRegister(RegNo) && @@ -112,8 +119,10 @@ std::string WebAssemblyAsmPrinter::regToString(const MachineOperand &MO) { return '$' + utostr(WAReg); } -const char *WebAssemblyAsmPrinter::toString(MVT VT) const { - return WebAssembly::TypeToString(VT); +WebAssemblyTargetStreamer * +WebAssemblyAsmPrinter::getTargetStreamer() { + MCTargetStreamer *TS = OutStreamer->getTargetStreamer(); + return static_cast(TS); } //===----------------------------------------------------------------------===// @@ -146,29 +155,20 @@ static void ComputeLegalValueVTs(const Function &F, const TargetMachine &TM, } void WebAssemblyAsmPrinter::EmitFunctionBodyStart() { - if (!MFI->getParams().empty()) { - MCInst Param; - Param.setOpcode(WebAssembly::PARAM); - for (MVT VT : MFI->getParams()) - Param.addOperand(MCOperand::createImm(VT.SimpleTy)); - EmitToStreamer(*OutStreamer, Param); - } + if (!MFI->getParams().empty()) + getTargetStreamer()->emitParam(MFI->getParams()); SmallVector ResultVTs; const Function &F(*MF->getFunction()); ComputeLegalValueVTs(F, TM, F.getReturnType(), ResultVTs); + // If the return type needs to be legalized it will get converted into // passing a pointer. - if (ResultVTs.size() == 1) { - MCInst Result; - Result.setOpcode(WebAssembly::RESULT); - Result.addOperand(MCOperand::createImm(ResultVTs.front().SimpleTy)); - EmitToStreamer(*OutStreamer, Result); - } + if (ResultVTs.size() == 1) + getTargetStreamer()->emitResult(ResultVTs); bool AnyWARegs = false; - MCInst Local; - Local.setOpcode(WebAssembly::LOCAL); + SmallVector LocalTypes; for (unsigned Idx = 0, IdxE = MRI->getNumVirtRegs(); Idx != IdxE; ++Idx) { unsigned VReg = TargetRegisterInfo::index2VirtReg(Idx); unsigned WAReg = MFI->getWAReg(VReg); @@ -181,22 +181,26 @@ void WebAssemblyAsmPrinter::EmitFunctionBodyStart() { // Don't declare stackified registers. if (int(WAReg) < 0) continue; - Local.addOperand(MCOperand::createImm(getRegType(VReg).SimpleTy)); + LocalTypes.push_back(getRegType(VReg)); AnyWARegs = true; } auto &PhysRegs = MFI->getPhysRegs(); for (unsigned PReg = 0; PReg < PhysRegs.size(); ++PReg) { if (PhysRegs[PReg] == -1U) continue; - Local.addOperand(MCOperand::createImm(getRegType(PReg).SimpleTy)); + LocalTypes.push_back(getRegType(PReg)); AnyWARegs = true; } if (AnyWARegs) - EmitToStreamer(*OutStreamer, Local); + getTargetStreamer()->emitLocal(LocalTypes); AsmPrinter::EmitFunctionBodyStart(); } +void WebAssemblyAsmPrinter::EmitFunctionBodyEnd() { + getTargetStreamer()->emitEndFunc(); +} + void WebAssemblyAsmPrinter::EmitInstruction(const MachineInstr *MI) { DEBUG(dbgs() << "EmitInstruction: " << *MI << '\n'); diff --git a/lib/Target/WebAssembly/WebAssemblyInstrControl.td b/lib/Target/WebAssembly/WebAssemblyInstrControl.td index d2852012be1..fda95953db8 100644 --- a/lib/Target/WebAssembly/WebAssemblyInstrControl.td +++ b/lib/Target/WebAssembly/WebAssemblyInstrControl.td @@ -42,19 +42,19 @@ let Defs = [ARGUMENTS] in { // jump tables, so in practice we don't ever use TABLESWITCH_I64 in wasm32 mode // currently. // Set TSFlags{0} to 1 to indicate that the variable_ops are immediates. -// Set TSFlags{2} to 1 to indicate that the immediates represent labels. +// Set TSFlags{1} to 1 to indicate that the immediates represent labels. let isTerminator = 1, hasCtrlDep = 1, isBarrier = 1 in { def TABLESWITCH_I32 : I<(outs), (ins I32:$index, bb_op:$default, variable_ops), [(WebAssemblytableswitch I32:$index, bb:$default)], "tableswitch\t$index, $default"> { let TSFlags{0} = 1; - let TSFlags{2} = 1; + let TSFlags{1} = 1; } def TABLESWITCH_I64 : I<(outs), (ins I64:$index, bb_op:$default, variable_ops), [(WebAssemblytableswitch I64:$index, bb:$default)], "tableswitch\t$index, $default"> { let TSFlags{0} = 1; - let TSFlags{2} = 1; + let TSFlags{1} = 1; } } // isTerminator = 1, hasCtrlDep = 1, isBarrier = 1 diff --git a/lib/Target/WebAssembly/WebAssemblyInstrInfo.td b/lib/Target/WebAssembly/WebAssemblyInstrInfo.td index 419ad7fbeb7..2e682a47547 100644 --- a/lib/Target/WebAssembly/WebAssemblyInstrInfo.td +++ b/lib/Target/WebAssembly/WebAssemblyInstrInfo.td @@ -145,26 +145,6 @@ def : Pat<(i32 (WebAssemblywrapper tglobaladdr:$addr)), def : Pat<(i32 (WebAssemblywrapper texternalsym:$addr)), (CONST_I32 texternalsym:$addr)>; -let Defs = [ARGUMENTS] in { - -// Function signature and local variable declaration "instructions". -// Set TSFlags{0} to 1 to indicate that the variable_ops are immediates. -// Set TSFlags{1} to 1 to indicate that the immediates represent types. -def PARAM : I<(outs), (ins variable_ops), [], ".param \t"> { - let TSFlags{0} = 1; - let TSFlags{1} = 1; -} -def RESULT : I<(outs), (ins variable_ops), [], ".result \t"> { - let TSFlags{0} = 1; - let TSFlags{1} = 1; -} -def LOCAL : I<(outs), (ins variable_ops), [], ".local \t"> { - let TSFlags{0} = 1; - let TSFlags{1} = 1; -} - -} // Defs = [ARGUMENTS] - //===----------------------------------------------------------------------===// // Additional sets of instructions. //===----------------------------------------------------------------------===//