Delete the MacOSJITEventListener per echristo's request. It was disabled by

[oota-llvm.git] / lib / ExecutionEngine / JIT / TargetSelect.cpp

diff --git a/lib/ExecutionEngine/JIT/TargetSelect.cpp b/lib/ExecutionEngine/JIT/TargetSelect.cpp
index 30fd2fae4bcc366f09b64eabb0defffd7b7446f4..8bed33bb7d42c9dc7bc6d758d5200145b8927884 100644 (file)
--- a/lib/ExecutionEngine/JIT/TargetSelect.cpp
+++ b/lib/ExecutionEngine/JIT/TargetSelect.cpp
@@ -2,60 +2,95 @@
 //
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
-// This just asks the TargetMachineRegistry for the appropriate JIT to use, and
-// allows the user to specify a specific one on the commandline with -march=x.
+// This just asks the TargetRegistry for the appropriate JIT to use, and allows
+// the user to specify a specific one on the commandline with -march=x. Clients
+// should initialize targets prior to calling createJIT.
 //
 //===----------------------------------------------------------------------===//
 
 #include "JIT.h"
 #include "llvm/Module.h"
 #include "llvm/ModuleProvider.h"
+#include "llvm/ADT/Triple.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/System/Host.h"
 #include "llvm/Target/SubtargetFeature.h"
 #include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetMachineRegistry.h"
+#include "llvm/Target/TargetRegistry.h"
 using namespace llvm;
 
-static cl::opt<const TargetMachineRegistry::Entry*, false, TargetNameParser>
-MArch("march", cl::desc("Architecture to generate assembly for:"));
+static cl::opt<std::string>
+MArch("march",
+      cl::desc("Architecture to generate assembly for (see --version)"));
 
 static cl::opt<std::string>
-MCPU("mcpu", 
+MCPU("mcpu",
   cl::desc("Target a specific cpu type (-mcpu=help for details)"),
   cl::value_desc("cpu-name"),
   cl::init(""));
 
 static cl::list<std::string>
-MAttrs("mattr", 
+MAttrs("mattr",
   cl::CommaSeparated,
   cl::desc("Target specific attributes (-mattr=help for details)"),
   cl::value_desc("a1,+a2,-a3,..."));
 
-/// create - Create an return a new JIT compiler if there is one available
-/// for the current target.  Otherwise, return null.
-///
-ExecutionEngine *JIT::create(ModuleProvider *MP, std::string *ErrorStr) {
-  if (MArch == 0) {
+/// selectTarget - Pick a target either via -march or by guessing the native
+/// arch.  Add any CPU features specified via -mcpu or -mattr.
+TargetMachine *JIT::selectTarget(ModuleProvider *MP, std::string *ErrorStr) {
+  Module &Mod = *MP->getModule();
+
+  Triple TheTriple(Mod.getTargetTriple());
+  if (TheTriple.getTriple().empty())
+    TheTriple.setTriple(sys::getHostTriple());
+
+  // Adjust the triple to match what the user requested.
+  const Target *TheTarget = 0;
+  if (!MArch.empty()) {
+    for (TargetRegistry::iterator it = TargetRegistry::begin(),
+           ie = TargetRegistry::end(); it != ie; ++it) {
+      if (MArch == it->getName()) {
+        TheTarget = &*it;
+        break;
+      }
+    }
+
+    if (!TheTarget) {
+      *ErrorStr = "No available targets are compatible with this -march, "
+        "see -version for the available targets.\n";
+      return 0;
+    }
+
+    // Adjust the triple to match (if known), otherwise stick with the
+    // module/host triple.
+    Triple::ArchType Type = Triple::getArchTypeForLLVMName(MArch);
+    if (Type != Triple::UnknownArch)
+      TheTriple.setArch(Type);
+  } else {
     std::string Error;
-    MArch = TargetMachineRegistry::getClosestTargetForJIT(Error);
-    if (MArch == 0) {
+    TheTarget = TargetRegistry::lookupTarget(TheTriple.getTriple(), Error);
+    if (TheTarget == 0) {
       if (ErrorStr)
         *ErrorStr = Error;
       return 0;
     }
-  } else if (MArch->JITMatchQualityFn() == 0) {
-    cerr << "WARNING: This target JIT is not designed for the host you are"
-         << " running.  If bad things happen, please choose a different "
-         << "-march switch.\n";
+  }
+
+  if (!TheTarget->hasJIT()) {
+    errs() << "WARNING: This target JIT is not designed for the host you are"
+           << " running.  If bad things happen, please choose a different "
+           << "-march switch.\n";
   }
 
   // Package up features to be passed to target/subtarget
   std::string FeaturesStr;
-  if (MCPU.size() || MAttrs.size()) {
+  if (!MCPU.empty() || !MAttrs.empty()) {
     SubtargetFeatures Features;
     Features.setCPU(MCPU);
     for (unsigned i = 0; i != MAttrs.size(); ++i)
@@ -64,14 +99,8 @@ ExecutionEngine *JIT::create(ModuleProvider *MP, std::string *ErrorStr) {
   }
 
   // Allocate a target...
-  TargetMachine *Target = MArch->CtorFn(*MP->getModule(), FeaturesStr);
+  TargetMachine *Target = 
+    TheTarget->createTargetMachine(TheTriple.getTriple(), FeaturesStr);
   assert(Target && "Could not allocate target machine!");
-
-  // If the target supports JIT code generation, return a new JIT now.
-  if (TargetJITInfo *TJ = Target->getJITInfo())
-    return new JIT(MP, *Target, *TJ);
-
-  if (ErrorStr)
-    *ErrorStr = "target does not support JIT code generation";
-  return 0;
+  return Target;
 }