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https://github.com/c64scene-ar/llvm-6502.git
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7bbd6e366b
This adds 'elf' as a recognized target triple environment value and overrides the default generated object format on Windows platforms if that value is present. This patch also enables MCJIT tests on Windows using the new environment value. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165030 91177308-0d34-0410-b5e6-96231b3b80d8
101 lines
3.5 KiB
C++
101 lines
3.5 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 TargetRegistry for the appropriate target 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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// -mcpu=y, and -mattr=a,-b,+c. Clients should initialize targets prior to
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// calling selectTarget().
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ExecutionEngine/ExecutionEngine.h"
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#include "llvm/Module.h"
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#include "llvm/ADT/Triple.h"
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#include "llvm/MC/SubtargetFeature.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/Host.h"
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#include "llvm/Support/TargetRegistry.h"
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using namespace llvm;
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TargetMachine *EngineBuilder::selectTarget() {
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Triple TT;
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// MCJIT can generate code for remote targets, but the old JIT and Interpreter
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// must use the host architecture.
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if (UseMCJIT && WhichEngine != EngineKind::Interpreter && M)
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TT.setTriple(M->getTargetTriple());
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else
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TT.setTriple(LLVM_HOSTTRIPLE);
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return selectTarget(TT, MArch, MCPU, MAttrs);
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}
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/// selectTarget - Pick a target either via -march or by guessing the native
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/// arch. Add any CPU features specified via -mcpu or -mattr.
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TargetMachine *EngineBuilder::selectTarget(const Triple &TargetTriple,
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StringRef MArch,
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StringRef MCPU,
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const SmallVectorImpl<std::string>& MAttrs) {
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Triple TheTriple(TargetTriple);
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if (TheTriple.getTriple().empty())
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TheTriple.setTriple(sys::getDefaultTargetTriple());
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// Adjust the triple to match what the user requested.
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const Target *TheTarget = 0;
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if (!MArch.empty()) {
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for (TargetRegistry::iterator it = TargetRegistry::begin(),
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ie = TargetRegistry::end(); it != ie; ++it) {
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if (MArch == it->getName()) {
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TheTarget = &*it;
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break;
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}
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}
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if (!TheTarget) {
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if (ErrorStr)
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*ErrorStr = "No available targets are compatible with this -march, "
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"see -version for the available targets.\n";
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return 0;
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}
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// Adjust the triple to match (if known), otherwise stick with the
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// requested/host triple.
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Triple::ArchType Type = Triple::getArchTypeForLLVMName(MArch);
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if (Type != Triple::UnknownArch)
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TheTriple.setArch(Type);
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} else {
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std::string Error;
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TheTarget = TargetRegistry::lookupTarget(TheTriple.getTriple(), 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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}
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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 (!MAttrs.empty()) {
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SubtargetFeatures Features;
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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 = TheTarget->createTargetMachine(TheTriple.getTriple(),
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MCPU, FeaturesStr,
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Options,
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RelocModel, CMModel,
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OptLevel);
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assert(Target && "Could not allocate target machine!");
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return Target;
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}
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