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Revert 90628, which was incorrect. 

llvm-svn: 91448
This commit is contained in:
Dan Gohman 2009-12-15 20:21:44 +00:00
parent 8fbe78f6fc
commit c87c16b030
2 changed files with 10 additions and 8 deletions
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15
llvm/utils/TableGen/CodeEmitterGen.cpp
View File

@ -61,11 +61,14 @@ 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 Init *VarVal,
int CodeEmitterGen::getVariableBit(const std::string &VarName,
BitsInit *BI, int bit) {
if (VarBitInit *VBI = dynamic_cast<VarBitInit*>(BI->getBit(bit))) {
TypedInit *TI = VBI->getVariable();
if (TI == VarVal) return VBI->getBitNum();
if (VarInit *VI = dynamic_cast<VarInit*>(TI)) {
if (VI->getName() == VarName) return VBI->getBitNum();
}
}
return -1;
@ -159,11 +162,11 @@ 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 Init *VarVal = Vals[i].getValue();
const std::string &VarName = Vals[i].getName();
bool gotOp = false;
for (int bit = BI->getNumBits()-1; bit >= 0; ) {
int varBit = getVariableBit(VarVal, BI, bit);
int varBit = getVariableBit(VarName, BI, bit);
if (varBit == -1) {
--bit;
@ -173,7 +176,7 @@ void CodeEmitterGen::run(raw_ostream &o) {
int N = 1;
for (--bit; bit >= 0;) {
varBit = getVariableBit(VarVal, BI, bit);
varBit = getVariableBit(VarName, BI, bit);
if (varBit == -1 || varBit != (beginVarBit - N)) break;
++N;
--bit;
@ -185,7 +188,7 @@ void CodeEmitterGen::run(raw_ostream &o) {
while (CGI.isFlatOperandNotEmitted(op))
++op;
Case += " // op: " + Vals[i].getName() + "\n"
Case += " // op: " + VarName + "\n"
+ " op = getMachineOpValue(MI, MI.getOperand("
+ utostr(op++) + "));\n";
gotOp = true;

3
llvm/utils/TableGen/CodeEmitterGen.h
View File

@ -23,7 +23,6 @@ namespace llvm {
class RecordVal;
class BitsInit;
struct Init;
class CodeEmitterGen : public TableGenBackend {
RecordKeeper &Records;
@ -36,7 +35,7 @@ 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 Init *VarVal, BitsInit *BI, int bit);
int getVariableBit(const std::string &VarName, BitsInit *BI, int bit);
};
} // End llvm namespace