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view gen/irstate.h @ 1479:4f7d50c744ed
Rewrite `StructLiteralExp::toElem` to store individual fields instead of
generating a constant to fill the entire struct with a single `store`.
This is much more efficient at compile time (fixing #320) and vastly reduces
the size of the emitted code. Since LLVM no longer needs to keep the data for
all fields in "registers" until the store happens, it should also be more
efficient at run time in cases where the fields aren't assigned with constants.
There's also some code clean-up by removing duplicated logic.
author | Frits van Bommel <fvbommel wxs.nl> |
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date | Sat, 06 Jun 2009 20:16:13 +0200 |
parents | 4dca8ed9d8b7 |
children | e1e93343fc11 |
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#ifndef LDC_GEN_IRSTATE_H #define LDC_GEN_IRSTATE_H #include <vector> #include <deque> #include <list> #include <sstream> #include "root.h" #include "aggregate.h" #include "ir/irfunction.h" #include "ir/irstruct.h" #include "ir/irvar.h" #include "llvm/Support/CallSite.h" namespace llvm { class TargetMachine; } // global ir state for current module struct IRState; struct TargetABI; extern IRState* gIR; extern llvm::TargetMachine* gTargetMachine; extern const llvm::TargetData* gTargetData; extern TargetABI* gABI; struct TypeFunction; struct TypeStruct; struct ClassDeclaration; struct FuncDeclaration; struct Module; struct TypeStruct; struct BaseClass; struct AnonDeclaration; struct IrModule; // represents a scope struct IRScope { llvm::BasicBlock* begin; llvm::BasicBlock* end; IRBuilder<> builder; IRScope(); IRScope(llvm::BasicBlock* b, llvm::BasicBlock* e); }; struct IRBuilderHelper { IRState* state; IRBuilder<>* operator->(); }; struct IRAsmStmt { IRAsmStmt() : isBranchToLabel(NULL) {} std::string code; std::string out_c; std::string in_c; std::vector<LLValue*> out; std::vector<LLValue*> in; // if this is nonzero, it contains the target label Identifier* isBranchToLabel; }; struct IRAsmBlock { std::deque<IRAsmStmt*> s; std::set<std::string> clobs; size_t outputcount; // stores the labels within the asm block std::vector<Identifier*> internalLabels; AsmBlockStatement* asmBlock; const LLType* retty; unsigned retn; bool retemu; // emulate abi ret with a temporary LLValue* (*retfixup)(IRBuilderHelper b, LLValue* orig); // Modifies retval IRAsmBlock(AsmBlockStatement* b) : asmBlock(b), retty(NULL), retn(0), retemu(false), retfixup(NULL), outputcount(0) {} }; // represents the module struct IRState { IRState(llvm::Module* m); // module Module* dmodule; llvm::Module* module; // interface info type, used in DtoInterfaceInfoType const LLStructType* interfaceInfoType; const LLStructType* mutexType; const LLStructType* moduleRefType; // functions typedef std::vector<IrFunction*> FunctionVector; FunctionVector functions; IrFunction* func(); llvm::Function* topfunc(); TypeFunction* topfunctype(); llvm::Instruction* topallocapoint(); // structs typedef std::vector<IrStruct*> StructVector; StructVector structs; IrStruct* topstruct(); // D main function bool emitMain; llvm::Function* mainFunc; // basic block scopes std::vector<IRScope> scopes; IRScope& scope(); llvm::BasicBlock* scopebb(); llvm::BasicBlock* scopeend(); bool scopereturned(); // create a call or invoke, depending on the landing pad info // the template function is defined further down in this file template <typename InputIterator> llvm::CallSite CreateCallOrInvoke(LLValue* Callee, InputIterator ArgBegin, InputIterator ArgEnd, const char* Name=""); llvm::CallSite CreateCallOrInvoke(LLValue* Callee, const char* Name=""); llvm::CallSite CreateCallOrInvoke(LLValue* Callee, LLValue* Arg1, const char* Name=""); llvm::CallSite CreateCallOrInvoke2(LLValue* Callee, LLValue* Arg1, LLValue* Arg2, const char* Name=""); llvm::CallSite CreateCallOrInvoke3(LLValue* Callee, LLValue* Arg1, LLValue* Arg2, LLValue* Arg3, const char* Name=""); llvm::CallSite CreateCallOrInvoke4(LLValue* Callee, LLValue* Arg1, LLValue* Arg2, LLValue* Arg3, LLValue* Arg4, const char* Name=""); // this holds the array being indexed or sliced so $ will work // might be a better way but it works. problem is I only get a // VarDeclaration for __dollar, but I can't see how to get the // array pointer from this :( std::vector<DValue*> arrays; // builder helper IRBuilderHelper ir; // debug info helper llvm::DIFactory difactory; // static ctors/dtors/unittests typedef std::vector<FuncDeclaration*> FuncDeclVector; FuncDeclVector ctors; FuncDeclVector dtors; FuncDeclVector unitTests; // all template instances that had members emitted // currently only filled for singleobj // used to make sure the complete template instance gets emitted in the // first file that touches a member, see #318 typedef std::set<TemplateInstance*> TemplateInstanceSet; TemplateInstanceSet seenTemplateInstances; // for inline asm IRAsmBlock* asmBlock; std::ostringstream nakedAsm; // 'used' array solely for keeping a reference to globals std::vector<LLConstant*> usedArray; // dwarf dbg stuff LLGlobalVariable* dwarfCUs; LLGlobalVariable* dwarfSPs; LLGlobalVariable* dwarfGVs; }; template <typename InputIterator> llvm::CallSite IRState::CreateCallOrInvoke(LLValue* Callee, InputIterator ArgBegin, InputIterator ArgEnd, const char* Name) { llvm::BasicBlock* pad = func()->landingPad; if(pad) { // intrinsics don't support invoking and 'nounwind' functions don't need it. LLFunction* funcval = llvm::dyn_cast<LLFunction>(Callee); if (funcval && (funcval->isIntrinsic() || funcval->doesNotThrow())) { llvm::CallInst* call = ir->CreateCall(Callee, ArgBegin, ArgEnd, Name); call->setAttributes(funcval->getAttributes()); return call; } llvm::BasicBlock* postinvoke = llvm::BasicBlock::Create("postinvoke", topfunc(), scopeend()); llvm::InvokeInst* invoke = ir->CreateInvoke(Callee, postinvoke, pad, ArgBegin, ArgEnd, Name); if (LLFunction* fn = llvm::dyn_cast<LLFunction>(Callee)) invoke->setAttributes(fn->getAttributes()); scope() = IRScope(postinvoke, scopeend()); return invoke; } else { llvm::CallInst* call = ir->CreateCall(Callee, ArgBegin, ArgEnd, Name); if (LLFunction* fn = llvm::dyn_cast<LLFunction>(Callee)) call->setAttributes(fn->getAttributes()); return call; } } #endif // LDC_GEN_IRSTATE_H