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1d5b4e20c9
- They still use the TargetMachineRegistry to populate the contents of the -march option (via the listener interface). We can't just populate it in the option parser because we can't expect the TargetRegistry to be populated yet (we no longer rely on static constructors). - There are a couple ways to finish killing off TargetMachineRegistry, but I haven't figured out the cleanest one yet... llvm-svn: 75773
86 lines
3.0 KiB
C++
86 lines
3.0 KiB
C++
//===-- TargetSelect.cpp - Target Chooser Code ----------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This just asks the TargetMachineRegistry for the appropriate JIT to use, and
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// allows the user to specify a specific one on the commandline with -march=x.
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//
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//===----------------------------------------------------------------------===//
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#include "JIT.h"
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#include "llvm/Module.h"
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#include "llvm/ModuleProvider.h"
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#include "llvm/Support/RegistryParser.h"
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#include "llvm/Support/Streams.h"
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#include "llvm/Target/SubtargetFeature.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/Target/TargetMachineRegistry.h"
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using namespace llvm;
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static cl::opt<const TargetMachineRegistry::entry*, false,
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RegistryParser<TargetMachine> >
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MArch("march", cl::desc("Architecture to generate assembly for:"));
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static cl::opt<std::string>
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MCPU("mcpu",
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cl::desc("Target a specific cpu type (-mcpu=help for details)"),
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cl::value_desc("cpu-name"),
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cl::init(""));
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static cl::list<std::string>
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MAttrs("mattr",
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cl::CommaSeparated,
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cl::desc("Target specific attributes (-mattr=help for details)"),
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cl::value_desc("a1,+a2,-a3,..."));
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/// createInternal - Create an return a new JIT compiler if there is one
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/// available for the current target. Otherwise, return null.
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///
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ExecutionEngine *JIT::createJIT(ModuleProvider *MP, std::string *ErrorStr,
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JITMemoryManager *JMM,
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CodeGenOpt::Level OptLevel,
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bool AllocateGVsWithCode) {
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const Target *TheTarget;
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if (MArch == 0) {
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std::string Error;
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TheTarget = TargetRegistry::getClosestTargetForJIT(Error);
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if (TheTarget == 0) {
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if (ErrorStr)
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*ErrorStr = Error;
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return 0;
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}
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} else if (TheTarget->getJITMatchQuality() == 0) {
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cerr << "WARNING: This target JIT is not designed for the host you are"
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<< " running. If bad things happen, please choose a different "
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<< "-march switch.\n";
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}
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// Package up features to be passed to target/subtarget
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std::string FeaturesStr;
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if (!MCPU.empty() || !MAttrs.empty()) {
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SubtargetFeatures Features;
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Features.setCPU(MCPU);
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for (unsigned i = 0; i != MAttrs.size(); ++i)
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Features.AddFeature(MAttrs[i]);
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FeaturesStr = Features.getString();
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}
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// Allocate a target...
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TargetMachine *Target =
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TheTarget->createTargetMachine(*MP->getModule(), FeaturesStr);
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assert(Target && "Could not allocate target machine!");
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// If the target supports JIT code generation, return a new JIT now.
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if (TargetJITInfo *TJ = Target->getJITInfo())
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return new JIT(MP, *Target, *TJ, JMM, OptLevel, AllocateGVsWithCode);
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if (ErrorStr)
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*ErrorStr = "target does not support JIT code generation";
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return 0;
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}
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