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Finally, add support for calling arbitrary non-varargs functions.

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llvm-svn: 15799
This commit is contained in:
Chris Lattner 2004-08-16 00:14:18 +00:00
parent 70ddd561fb
commit 9cbc5f306a
1 changed files with 58 additions and 9 deletions
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67
lib/ExecutionEngine/JIT/JIT.cpp
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@ -13,9 +13,11 @@
//===----------------------------------------------------------------------===//
#include "JIT.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Function.h"
#include "llvm/GlobalVariable.h"
#include "llvm/Instructions.h"
#include "llvm/ModuleProvider.h"
#include "llvm/CodeGen/MachineCodeEmitter.h"
#include "llvm/CodeGen/MachineFunction.h"
@ -35,7 +37,7 @@ JIT::JIT(ModuleProvider *MP, TargetMachine &tm, TargetJITInfo &tji)
MCE = createEmitter(*this);
// Add target data
PM.add (new TargetData (TM.getTargetData ()));
PM.add(new TargetData(TM.getTargetData()));
// Compile LLVM Code down to machine code in the intermediate representation
TJI.addPassesToJITCompile(PM);
@ -43,7 +45,7 @@ JIT::JIT(ModuleProvider *MP, TargetMachine &tm, TargetJITInfo &tji)
// Turn the machine code intermediate representation into bytes in memory that
// may be executed.
if (TM.addPassesToEmitMachineCode(PM, *MCE)) {
std::cerr << "lli: target '" << TM.getName()
std::cerr << "Target '" << TM.getName()
<< "' doesn't support machine code emission!\n";
abort();
}
@ -139,13 +141,60 @@ GenericValue JIT::runFunction(Function *F,
}
}
// FIXME: This code should handle a couple of common cases efficiently, but
// it should also implement the general case by code-gening a new anonymous
// nullary function to call.
std::cerr << "Sorry, unimplemented feature in the LLVM JIT. See LLVM"
<< " PR#419\n for details.\n";
abort();
return GenericValue();
// Okay, this is not one of our quick and easy cases. Because we don't have a
// full FFI, we have to codegen a nullary stub function that just calls the
// function we are interested in, passing in constants for all of the
// arguments. Make this function and return.
// First, create the function.
FunctionType *STy=FunctionType::get(RetTy, std::vector<const Type*>(), false);
Function *Stub = new Function(STy, Function::InternalLinkage, "",
F->getParent());
// Insert a basic block.
BasicBlock *StubBB = new BasicBlock("", Stub);
// Convert all of the GenericValue arguments over to constants. Note that we
// currently don't support varargs.
std::vector<Value*> Args;
for (unsigned i = 0, e = ArgValues.size(); i != e; ++i) {
Constant *C = 0;
const Type *ArgTy = FTy->getParamType(i);
const GenericValue &AV = ArgValues[i];
switch (ArgTy->getTypeID()) {
default: assert(0 && "Unknown argument type for function call!");
case Type::BoolTyID: C = ConstantBool::get(AV.BoolVal); break;
case Type::SByteTyID: C = ConstantSInt::get(ArgTy, AV.SByteVal); break;
case Type::UByteTyID: C = ConstantUInt::get(ArgTy, AV.UByteVal); break;
case Type::ShortTyID: C = ConstantSInt::get(ArgTy, AV.ShortVal); break;
case Type::UShortTyID: C = ConstantUInt::get(ArgTy, AV.UShortVal); break;
case Type::IntTyID: C = ConstantSInt::get(ArgTy, AV.IntVal); break;
case Type::UIntTyID: C = ConstantUInt::get(ArgTy, AV.UIntVal); break;
case Type::LongTyID: C = ConstantSInt::get(ArgTy, AV.LongVal); break;
case Type::ULongTyID: C = ConstantUInt::get(ArgTy, AV.ULongVal); break;
case Type::FloatTyID: C = ConstantFP ::get(ArgTy, AV.FloatVal); break;
case Type::DoubleTyID: C = ConstantFP ::get(ArgTy, AV.DoubleVal); break;
case Type::PointerTyID:
void *ArgPtr = GVTOP(AV);
if (sizeof(void*) == 4) {
C = ConstantSInt::get(Type::IntTy, (int)(intptr_t)ArgPtr);
} else {
C = ConstantSInt::get(Type::LongTy, (intptr_t)ArgPtr);
}
C = ConstantExpr::getCast(C, ArgTy); // Cast the integer to pointer
break;
}
Args.push_back(C);
}
Value *TheCall = new CallInst(F, Args, "", StubBB);
if (TheCall->getType() != Type::VoidTy)
new ReturnInst(TheCall, StubBB); // Return result of the call.
else
new ReturnInst(StubBB); // Just return void.
// Finally, return the value returned by our nullary stub function.
return runFunction(Stub, std::vector<GenericValue>());
}
/// runJITOnFunction - Run the FunctionPassManager full of