X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FExecutionEngine%2FTargetSelect.cpp;h=558d8b37af12585e89e8f90d16b2bdef86fa5906;hb=03fddb710e1db886dc158fd6ac6decf8201fe4aa;hp=83b1f0542c326af34c07be76b18e45edba0a65c1;hpb=ab8be96fd30ca9396e6b84fdddf1ac6208984cad;p=oota-llvm.git

diff --git a/lib/ExecutionEngine/TargetSelect.cpp b/lib/ExecutionEngine/TargetSelect.cpp
index 83b1f0542c3..558d8b37af1 100644
--- a/lib/ExecutionEngine/TargetSelect.cpp
+++ b/lib/ExecutionEngine/TargetSelect.cpp
@@ -7,33 +7,44 @@
 //
 //===----------------------------------------------------------------------===//
 //
-// 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.
+// This just asks the TargetRegistry for the appropriate target to use, and
+// allows the user to specify a specific one on the commandline with -march=x,
+// -mcpu=y, and -mattr=a,-b,+c. Clients should initialize targets prior to
+// calling selectTarget().
 //
 //===----------------------------------------------------------------------===//
 
 #include "llvm/ExecutionEngine/ExecutionEngine.h"
-#include "llvm/Module.h"
 #include "llvm/ADT/Triple.h"
+#include "llvm/IR/Module.h"
 #include "llvm/MC/SubtargetFeature.h"
 #include "llvm/Support/CommandLine.h"
-#include "llvm/Support/raw_ostream.h"
 #include "llvm/Support/Host.h"
+#include "llvm/Support/TargetRegistry.h"
 #include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetRegistry.h"
+
 using namespace llvm;
 
+TargetMachine *EngineBuilder::selectTarget() {
+  Triple TT;
+
+  // MCJIT can generate code for remote targets, but the old JIT and Interpreter
+  // must use the host architecture.
+  if (UseMCJIT && WhichEngine != EngineKind::Interpreter && M)
+    TT.setTriple(M->getTargetTriple());
+
+  return selectTarget(TT, MArch, MCPU, MAttrs);
+}
+
 /// selectTarget - Pick a target either via -march or by guessing the native
 /// arch.  Add any CPU features specified via -mcpu or -mattr.
-TargetMachine *EngineBuilder::selectTarget(Module *Mod,
+TargetMachine *EngineBuilder::selectTarget(const Triple &TargetTriple,
                               StringRef MArch,
                               StringRef MCPU,
-                              const SmallVectorImpl<std::string>& MAttrs,
-                              std::string *ErrorStr) {
-  Triple TheTriple(Mod->getTargetTriple());
+                              const SmallVectorImpl<std::string>& MAttrs) {
+  Triple TheTriple(TargetTriple);
   if (TheTriple.getTriple().empty())
-    TheTriple.setTriple(sys::getHostTriple());
+    TheTriple.setTriple(sys::getProcessTriple());
 
   // Adjust the triple to match what the user requested.
   const Target *TheTarget = 0;
@@ -47,13 +58,14 @@ TargetMachine *EngineBuilder::selectTarget(Module *Mod,
     }
 
     if (!TheTarget) {
-      *ErrorStr = "No available targets are compatible with this -march, "
-        "see -version for the available targets.\n";
+      if (ErrorStr)
+        *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.
+    // requested/host triple.
     Triple::ArchType Type = Triple::getArchTypeForLLVMName(MArch);
     if (Type != Triple::UnknownArch)
       TheTriple.setArch(Type);
@@ -67,25 +79,29 @@ TargetMachine *EngineBuilder::selectTarget(Module *Mod,
     }
   }
 
-  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.empty() || !MAttrs.empty()) {
+  if (!MAttrs.empty()) {
     SubtargetFeatures Features;
-    Features.setCPU(MCPU);
     for (unsigned i = 0; i != MAttrs.size(); ++i)
       Features.AddFeature(MAttrs[i]);
     FeaturesStr = Features.getString();
   }
 
+  // FIXME: non-iOS ARM FastISel is broken with MCJIT.
+  if (UseMCJIT &&
+      TheTriple.getArch() == Triple::arm &&
+      TheTriple.getOS() != Triple::IOS &&
+      OptLevel == CodeGenOpt::None) {
+    OptLevel = CodeGenOpt::Less;
+  }
+
   // Allocate a target...
-  TargetMachine *Target =
-    TheTarget->createTargetMachine(TheTriple.getTriple(), FeaturesStr);
+  TargetMachine *Target = TheTarget->createTargetMachine(TheTriple.getTriple(),
+                                                         MCPU, FeaturesStr,
+                                                         Options,
+                                                         RelocModel, CMModel,
+                                                         OptLevel);
   assert(Target && "Could not allocate target machine!");
   return Target;
 }