6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2026-04-26 12:20:42 +00:00
Code Issues Projects Releases Wiki Activity

* Use new style casts more

Browse Source 
* Add real support for global variable addresses initializing constants
* Fix encoding/decoding of VarArgs calls
* Support the Invoke instruction


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@761 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2001-10-13 06:48:38 +00:00
parent 05950c34a4
commit 1b98c5c6c3
3 changed files with 41 additions and 25 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/Bytecode/Writer/InstructionWriter.cpp
+21 -12
View File
@@ -16,6 +16,7 @@
#include "llvm/Instruction.h"
#include "llvm/DerivedTypes.h"
#include "llvm/iOther.h"
#include "llvm/iTerminators.h"
#include <algorithm>
typedef unsigned char uchar;
@@ -56,26 +57,29 @@ static void outputInstructionFormat0(const Instruction *I,
static void outputInstrVarArgsCall(const Instruction *I,
const SlotCalculator &Table, unsigned Type,
deque<uchar> &Out) {
assert(I->getOpcode() == Instruction::Call /*||
I->getOpcode() == Instruction::ICall */);
assert(isa<CallInst>(I) || isa<InvokeInst>(I));
// Opcode must have top two bits clear...
output_vbr(I->getOpcode(), Out); // Instruction Opcode ID
output_vbr(Type, Out); // Result type (varargs type)
unsigned NumArgs = I->getNumOperands();
output_vbr((NumArgs-2)*2+2, Out); // Don't duplicate method & Arg1 types
output_vbr(NumArgs*2, Out);
// TODO: Don't need to emit types for the fixed types of the varargs method
// prototype...
// Output the method type without an extra type argument.
// The type for the method has already been emitted in the type field of the
// instruction. Just emit the slot # now.
int Slot = Table.getValSlot(I->getOperand(0));
assert(Slot >= 0 && "No slot number for value!?!?");
output_vbr((unsigned)Slot, Out);
// VarArgs methods must have at least one specified operand
Slot = Table.getValSlot(I->getOperand(1));
assert(Slot >= 0 && "No slot number for value!?!?");
output_vbr((unsigned)Slot, Out);
// Output a dummy field to fill Arg#2 in the reader that is currently unused
// for varargs calls. This is a gross hack to make the code simpler, but we
// aren't really doing very small bytecode for varargs calls anyways.
// FIXME in the future: Smaller bytecode for varargs calls
output_vbr(0, Out);
for (unsigned i = 2; i < NumArgs; ++i) {
for (unsigned i = 1; i < NumArgs; ++i) {
// Output Arg Type ID
Slot = Table.getValSlot(I->getOperand(i)->getType());
assert(Slot >= 0 && "No slot number for value!?!?");
@@ -159,8 +163,6 @@ static void outputInstructionFormat3(const Instruction *I,
output(Opcode, Out);
}
#include "llvm/Assembly/Writer.h"
void BytecodeWriter::processInstruction(const Instruction *I) {
assert(I->getOpcode() < 64 && "Opcode too big???");
@@ -216,7 +218,14 @@ void BytecodeWriter::processInstruction(const Instruction *I) {
if (Slots[1] > MaxOpSlot) MaxOpSlot = Slots[1];
NumOperands++;
} else if (const CallInst *CI = dyn_cast<CallInst>(I)) {// Handle VarArg calls
if (CI->getCalledMethod()->getMethodType()->isVarArg()) {
PointerType *Ty = cast<PointerType>(CI->getCalledValue()->getType());
if (cast<MethodType>(Ty->getValueType())->isVarArg()) {
outputInstrVarArgsCall(I, Table, Type, Out);
return;
}
} else if (const InvokeInst *II = dyn_cast<InvokeInst>(I)) { // ... & Invokes
PointerType *Ty = cast<PointerType>(II->getCalledValue()->getType());
if (cast<MethodType>(Ty->getValueType())->isVarArg()) {
outputInstrVarArgsCall(I, Table, Type, Out);
return;
}