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#include "llvm/ADT/StringMap.h"
#include <string>
#include <vector>
namespace hooks {
/// NUM_KEYS - Calculate the size of a const char* array.
#define NUM_KEYS(Keys) sizeof(Keys) / sizeof(const char*)
// See http://graphics.stanford.edu/~seander/bithacks.html#RoundUpPowerOf2
inline unsigned NextHighestPowerOf2 (unsigned i) {
i |= i >> 1;
i |= i >> 2;
i |= i >> 4;
i |= i >> 8;
i |= i >> 16;
i++;
return i;
}
typedef std::vector<std::string> StrVec;
typedef llvm::StringMap<const char*> ArgMap;
/// ConvertToMAttrImpl - Common implementation of ConvertMArchToMAttr and
/// ConvertToMAttr. The optional Args parameter contains information about how
/// to transform special-cased values (for example, '-march=armv6' must be
/// forwarded as '-mattr=+v6').
std::string ConvertToMAttrImpl(const StrVec& Opts, const ArgMap* Args = 0) {
std::string out("-mattr=");
bool firstIter = true;
for (StrVec::const_iterator B = Opts.begin(), E = Opts.end(); B!=E; ++B) {
const std::string& Arg = *B;
if (firstIter)
firstIter = false;
else
out += ",";
// Check if the argument is a special case.
if (Args != 0) {
ArgMap::const_iterator I = Args->find(Arg);
if (I != Args->end()) {
out += '+';
out += I->getValue();
continue;
}
}
// Convert 'no-foo' to '-foo'.
if (Arg.find("no-") == 0 && Arg[3] != 0) {
out += '-';
out += Arg.c_str() + 3;
}
// Convert 'foo' to '+foo'.
else {
out += '+';
out += Arg;
}
}
return out;
}
// -march values that need to be special-cased.
const char* MArchKeysARM[] = { "armv4t", "armv5t", "armv5te", "armv6",
"armv6-m", "armv6t2", "armv7-a", "armv7-m" };
const char* MArchValuesARM[] = { "v4t", "v5t", "v5te", "v6", "v6m", "v6t2",
"v7a", "v7m" };
const unsigned MArchNumKeysARM = NUM_KEYS(MArchKeysARM);
const unsigned MArchMapSize = NextHighestPowerOf2(MArchNumKeysARM);
void FillInArgMap(ArgMap& Args, const char* Keys[],
const char* Values[], unsigned NumKeys)
{
for (unsigned i = 0; i < NumKeys; ++i) {
// Explicit cast to StringRef here is necessary to pick up the right
// overload.
Args.GetOrCreateValue(llvm::StringRef(Keys[i]), Values[i]);
}
}
/// ConvertMArchToMAttr - Convert -march from the gcc dialect to
/// something llc can understand.
std::string ConvertMArchToMAttr(const StrVec& Opts) {
static ArgMap MArchMap(MArchMapSize);
static bool StaticDataInitialized = false;
if (!StaticDataInitialized) {
FillInArgMap(MArchMap, MArchKeysARM, MArchValuesARM, MArchNumKeysARM);
StaticDataInitialized = true;
}
return ConvertToMAttrImpl(Opts, &MArchMap);
}
// -mcpu values that need to be special-cased.
const char* MCpuKeysPPC[] = { "G3", "G4", "G5", "powerpc", "powerpc64"};
const char* MCpuValuesPPC[] = { "g3", "g4", "g5", "ppc", "ppc64"};
const unsigned MCpuNumKeysPPC = NUM_KEYS(MCpuKeysPPC);
const unsigned MCpuMapSize = NextHighestPowerOf2(MCpuNumKeysPPC);
/// ConvertMCpu - Convert -mcpu value from the gcc to the llc dialect.
std::string ConvertMCpu(const char* Val) {
static ArgMap MCpuMap(MCpuMapSize);
static bool StaticDataInitialized = false;
if (!StaticDataInitialized) {
FillInArgMap(MCpuMap, MCpuKeysPPC, MCpuValuesPPC, MCpuNumKeysPPC);
StaticDataInitialized = true;
}
std::string ret = "-mcpu=";
ArgMap::const_iterator I = MCpuMap.find(Val);
if (I != MCpuMap.end()) {
return ret + I->getValue();
}
return ret + Val;
}
// -mfpu values that need to be special-cased.
const char* MFpuKeysARM[] = { "vfp", "vfpv3",
"vfpv3-fp16", "vfpv3-d16", "vfpv3-d16-fp16",
"neon", "neon-fp16" };
const char* MFpuValuesARM[] = { "vfp2", "vfp3",
"+vfp3,+fp16", "+vfp3,+d16", "+vfp3,+d16,+fp16",
"+neon", "+neon,+neonfp" };
const unsigned MFpuNumKeysARM = NUM_KEYS(MFpuKeysARM);
const unsigned MFpuMapSize = NextHighestPowerOf2(MFpuNumKeysARM);
/// ConvertMFpu - Convert -mfpu value from the gcc to the llc dialect.
std::string ConvertMFpu(const char* Val) {
static ArgMap MFpuMap(MFpuMapSize);
static bool StaticDataInitialized = false;
if (!StaticDataInitialized) {
FillInArgMap(MFpuMap, MFpuKeysARM, MFpuValuesARM, MFpuNumKeysARM);
StaticDataInitialized = true;
}
std::string ret = "-mattr=";
ArgMap::const_iterator I = MFpuMap.find(Val);
if (I != MFpuMap.end()) {
return ret + I->getValue();
}
return ret + '+' + Val;
}
/// ConvertToMAttr - Convert '-mfoo' and '-mno-bar' to '-mattr=+foo,-bar'.
std::string ConvertToMAttr(const StrVec& Opts) {
return ConvertToMAttrImpl(Opts);
}
}
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