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65 lines
1.9 KiB
C++
65 lines
1.9 KiB
C++
#include "llvm.hpp"
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LLVMState::LLVMState():
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ctx(),
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modul("forsp", ctx),
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builder(ctx),
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inttype(llvm::Type::getInt32Ty(ctx)),
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stacktype(llvm::VectorType::get(inttype, 12, false)),
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ftype(llvm::FunctionType::get(llvm::Type::getVoidTy(ctx), {}, false)),
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one(llvm::ConstantInt::get(inttype, 1)),
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zero(llvm::ConstantInt::get(inttype, 0))
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{
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auto zerovec = llvm::ConstantVector::get(llvm::ArrayRef(zero));
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llvmSp = new llvm::GlobalVariable(modul, inttype, false,
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llvm::GlobalValue::ExternalLinkage, zero, "sp");
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llvmStack = new llvm::GlobalVariable(modul, stacktype, false,
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llvm::GlobalValue::ExternalLinkage, zerovec, "stack");
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}
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llvm::Value *LLVMState::createPush()
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{
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auto dspval = builder.CreateLoad(inttype, llvmSp);
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auto inc = builder.CreateAdd(dspval, one);
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builder.CreateStore(inc, llvmSp, false);
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return builder.CreateGEP(stacktype, llvmStack, {zero, dspval});
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}
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llvm::Value *LLVMState::createPop()
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{
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auto dspval = builder.CreateLoad(inttype, llvmSp);
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auto dec = builder.CreateSub(dspval, one);
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builder.CreateStore(dec, llvmSp, false);
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return builder.CreateGEP(stacktype, llvmStack, {zero, dec});
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}
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llvm::Function *LLVMState::createFunction(const std::string& name)
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{
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return llvm::Function::Create(ftype, llvm::Function::ExternalLinkage,
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name.c_str(), modul);
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}
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llvm::BasicBlock *LLVMState::createEntry(llvm::Function *func)
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{
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return llvm::BasicBlock::Create(ctx, "entry", func);
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}
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llvm::Value *LLVMState::createVariable(const std::string& name)
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{
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return new llvm::GlobalVariable(modul, inttype, false,
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llvm::GlobalValue::InternalLinkage, zero, name);
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}
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llvm::Constant *LLVMState::createInt(int n)
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{
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return llvm::ConstantInt::get(ctx, llvm::APInt(32, n, true));
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}
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void LLVMState::output()
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{
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//std::cout << "LLVM:" << std::endl;
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modul.print(llvm::errs(), nullptr);
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}
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