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If a user requests help, give them help on both features and processors

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23905 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-10-23 22:23:13 +00:00
parent ed465f5407
commit 3e808a45b3
1 changed files with 42 additions and 26 deletions
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68
lib/Target/SubtargetFeature.cpp
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@ -123,31 +123,42 @@ static const SubtargetFeatureKV *Find(const std::string &S,
return F; return F;
} }
/// getLongestEntryLength - Return the length of the longest entry in the table.
///
static size_t getLongestEntryLength(const SubtargetFeatureKV *Table,
size_t Size) {
size_t MaxLen = 0;
for (size_t i = 0; i < Size; i++)
MaxLen = std::max(MaxLen, std::strlen(Table[i].Key));
return MaxLen;
}
/// Display help for feature choices. /// Display help for feature choices.
/// ///
static void Help(bool isFeature, const SubtargetFeatureKV *Table, static void Help(const SubtargetFeatureKV *CPUTable, size_t CPUTableSize,
size_t TableSize) { const SubtargetFeatureKV *FeatTable, size_t FeatTableSize) {
// Determine the length of the longest key. // Determine the length of the longest CPU and Feature entries.
size_t MaxLen = 0; unsigned MaxCPULen = getLongestEntryLength(CPUTable, CPUTableSize);
for (size_t i = 0; i < TableSize; i++) unsigned MaxFeatLen = getLongestEntryLength(FeatTable, FeatTableSize);
MaxLen = std::max(MaxLen, std::strlen(Table[i].Key));
std::cerr << "Available " << (isFeature ? "features" : "CPUs")
<< " for this target:\n\n";
for (size_t i = 0; i < TableSize; i++) {
// Compute required padding
size_t Pad = MaxLen - std::strlen(Table[i].Key);
std::cerr << Table[i].Key << std::string(Pad, ' ') << " - "
<< Table[i].Desc << ".\n";
}
// Print the CPU table.
std::cerr << "Available CPUs for this target:\n\n";
for (size_t i = 0; i != CPUTableSize; i++)
std::cerr << " " << CPUTable[i].Key
<< std::string(MaxCPULen - std::strlen(CPUTable[i].Key), ' ')
<< " - " << CPUTable[i].Desc << ".\n";
std::cerr << "\n"; std::cerr << "\n";
if (isFeature) {
std::cerr // Print the Feature table.
<< "Use +feature to enable a feature, or -feature to disable it.\n" std::cerr << "Available features for this target:\n\n";
<< "For example, llc -mcpu=mycpu -mattr=+feature1,-feature2\n"; for (size_t i = 0; i != FeatTableSize; i++)
} std::cerr << " " << FeatTable[i].Key
<< std::string(MaxFeatLen - std::strlen(FeatTable[i].Key), ' ')
<< " - " << FeatTable[i].Desc << ".\n";
std::cerr << "\n";
std::cerr << "Use +feature to enable a feature, or -feature to disable it.\n"
<< "For example, llc -mcpu=mycpu -mattr=+feature1,-feature2\n";
exit(1); exit(1);
} }
@ -203,10 +214,13 @@ uint32_t SubtargetFeatures::Parse(const std::string &String,
uint32_t Bits = 0; // Resulting bits uint32_t Bits = 0; // Resulting bits
// Split up features // Split up features
Split(Features, String); Split(Features, String);
// Check if default is needed // Check if default is needed
if (Features[0].empty()) Features[0] = DefaultCPU; if (Features[0].empty())
// Check for help Features[0] = DefaultCPU;
if (Features[0] == "help") Help(false, CPUTable, CPUTableSize); else if (Features[0] == "help")
Help(CPUTable, CPUTableSize, FeatureTable, FeatureTableSize);
// Find CPU entry // Find CPU entry
const SubtargetFeatureKV *CPUEntry = const SubtargetFeatureKV *CPUEntry =
Find(Features[0], CPUTable, CPUTableSize); Find(Features[0], CPUTable, CPUTableSize);
@ -222,10 +236,12 @@ uint32_t SubtargetFeatures::Parse(const std::string &String,
} }
// Iterate through each feature // Iterate through each feature
for (size_t i = 1; i < Features.size(); i++) { for (size_t i = 1; i < Features.size(); i++) {
// Get next feature
const std::string &Feature = Features[i]; const std::string &Feature = Features[i];
// Check for help // Check for help
if (Feature == "+help") Help(true, FeatureTable, FeatureTableSize); if (Feature == "+help")
Help(CPUTable, CPUTableSize, FeatureTable, FeatureTableSize);
// Find feature in table. // Find feature in table.
const SubtargetFeatureKV *FeatureEntry = const SubtargetFeatureKV *FeatureEntry =
Find(StripFlag(Feature), FeatureTable, FeatureTableSize); Find(StripFlag(Feature), FeatureTable, FeatureTableSize);