6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-07-27 13:29:50 +00:00
Code Issues Projects Releases Wiki Activity

Minor code simplification.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90628 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2009-12-05 00:05:43 +00:00
parent 63be493b52
commit 7004b9cf33
2 changed files with 8 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
utils/TableGen/CodeEmitterGen.cpp
View File

@ -61,14 +61,11 @@ void CodeEmitterGen::reverseBits(std::vector<Record*> &Insts) {
// If the VarBitInit at position 'bit' matches the specified variable then
// return the variable bit position. Otherwise return -1.
int CodeEmitterGen::getVariableBit(const std::string &VarName,
int CodeEmitterGen::getVariableBit(const Init *VarVal,
BitsInit *BI, int bit) {
if (VarBitInit *VBI = dynamic_cast<VarBitInit*>(BI->getBit(bit))) {
TypedInit *TI = VBI->getVariable();
if (VarInit *VI = dynamic_cast<VarInit*>(TI)) {
if (VI->getName() == VarName) return VBI->getBitNum();
}
if (TI == VarVal) return VBI->getBitNum();
}
return -1;
@ -162,11 +159,11 @@ void CodeEmitterGen::run(raw_ostream &o) {
if (!Vals[i].getPrefix() && !Vals[i].getValue()->isComplete()) {
// Is the operand continuous? If so, we can just mask and OR it in
// instead of doing it bit-by-bit, saving a lot in runtime cost.
const std::string &VarName = Vals[i].getName();
const Init *VarVal = Vals[i].getValue();
bool gotOp = false;
for (int bit = BI->getNumBits()-1; bit >= 0; ) {
int varBit = getVariableBit(VarName, BI, bit);
int varBit = getVariableBit(VarVal, BI, bit);
if (varBit == -1) {
--bit;
@ -176,7 +173,7 @@ void CodeEmitterGen::run(raw_ostream &o) {
int N = 1;
for (--bit; bit >= 0;) {
varBit = getVariableBit(VarName, BI, bit);
varBit = getVariableBit(VarVal, BI, bit);
if (varBit == -1 || varBit != (beginVarBit - N)) break;
++N;
--bit;
@ -188,7 +185,7 @@ void CodeEmitterGen::run(raw_ostream &o) {
while (CGI.isFlatOperandNotEmitted(op))
++op;
Case += " // op: " + VarName + "\n"
Case += " // op: " + Vals[i].getName() + "\n"
+ " op = getMachineOpValue(MI, MI.getOperand("
+ utostr(op++) + "));\n";
gotOp = true;

3
utils/TableGen/CodeEmitterGen.h
View File

@ -23,6 +23,7 @@ namespace llvm {
class RecordVal;
class BitsInit;
class Init;
class CodeEmitterGen : public TableGenBackend {
RecordKeeper &Records;
@ -35,7 +36,7 @@ private:
void emitMachineOpEmitter(raw_ostream &o, const std::string &Namespace);
void emitGetValueBit(raw_ostream &o, const std::string &Namespace);
void reverseBits(std::vector<Record*> &Insts);
int getVariableBit(const std::string &VarName, BitsInit *BI, int bit);
int getVariableBit(const Init *VarVal, BitsInit *BI, int bit);
};
} // End llvm namespace