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Compute feature bits at time of MCSubtargetInfo initialization.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134606 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2011-07-07 07:07:08 +00:00
parent cbd40f8357
commit 0ddff1b535
33 changed files with 159 additions and 108 deletions
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38
lib/MC/SubtargetFeature.cpp
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@@ -231,8 +231,9 @@ uint64_t SubtargetFeatures::getFeatureBits(const StringRef CPU,
size_t CPUTableSize,
const SubtargetFeatureKV *FeatureTable,
size_t FeatureTableSize) {
assert(CPUTable && "missing CPU table");
assert(FeatureTable && "missing features table");
if (!FeatureTableSize || !CPUTableSize)
return 0;
#ifndef NDEBUG
for (size_t i = 1; i < CPUTableSize; i++) {
assert(strcmp(CPUTable[i - 1].Key, CPUTable[i].Key) < 0 &&
@@ -249,24 +250,27 @@ uint64_t SubtargetFeatures::getFeatureBits(const StringRef CPU,
if (CPU == "help")
Help(CPUTable, CPUTableSize, FeatureTable, FeatureTableSize);
// Find CPU entry
const SubtargetFeatureKV *CPUEntry = Find(CPU, CPUTable, CPUTableSize);
// If there is a match
if (CPUEntry) {
// Set base feature bits
Bits = CPUEntry->Value;
// Find CPU entry if CPU name is specified.
if (!CPU.empty()) {
const SubtargetFeatureKV *CPUEntry = Find(CPU, CPUTable, CPUTableSize);
// If there is a match
if (CPUEntry) {
// Set base feature bits
Bits = CPUEntry->Value;
// Set the feature implied by this CPU feature, if any.
for (size_t i = 0; i < FeatureTableSize; ++i) {
const SubtargetFeatureKV &FE = FeatureTable[i];
if (CPUEntry->Value & FE.Value)
SetImpliedBits(Bits, &FE, FeatureTable, FeatureTableSize);
// Set the feature implied by this CPU feature, if any.
for (size_t i = 0; i < FeatureTableSize; ++i) {
const SubtargetFeatureKV &FE = FeatureTable[i];
if (CPUEntry->Value & FE.Value)
SetImpliedBits(Bits, &FE, FeatureTable, FeatureTableSize);
}
} else {
errs() << "'" << CPU
<< "' is not a recognized processor for this target"
<< " (ignoring processor)\n";
}
} else {
errs() << "'" << CPU
<< "' is not a recognized processor for this target"
<< " (ignoring processor)\n";
}
// Iterate through each feature
for (size_t i = 0, E = Features.size(); i < E; i++) {
const StringRef Feature = Features[i];