X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FTargetMachineRegistry.cpp;h=f5bd035d03354a334d04c1255528a02695315b21;hb=89fad2c3b27f62c53a807839c752626f2b11142f;hp=ecbfc82932b35862d89c54bc0c0e6c0b5a718eaa;hpb=d7099bc608421321c0933120baac7d1032e5fc1c;p=oota-llvm.git

diff --git a/lib/Target/TargetMachineRegistry.cpp b/lib/Target/TargetMachineRegistry.cpp
index ecbfc82932b..f5bd035d033 100644
--- a/lib/Target/TargetMachineRegistry.cpp
+++ b/lib/Target/TargetMachineRegistry.cpp
@@ -1,10 +1,10 @@
 //===-- TargetMachineRegistry.cpp - Target Auto Registration Impl ---------===//
-// 
+//
 //                     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 exposes the RegisterTarget class, which TargetMachine
@@ -18,8 +18,35 @@
 #include <algorithm>
 using namespace llvm;
 
+/// List - This is the main list of all of the registered target machines.
 const TargetMachineRegistry::Entry *TargetMachineRegistry::List = 0;
 
+/// Listeners - All of the listeners registered to get notified when new targets
+/// are loaded.
+static TargetRegistrationListener *Listeners = 0;
+
+TargetMachineRegistry::Entry::Entry(const char *N, const char *SD,
+                       TargetMachine *(*CF)(const Module &, IntrinsicLowering*,
+                                            const std::string &),
+                           unsigned (*MMF)(const Module &M), unsigned (*JMF)())
+  : Name(N), ShortDesc(SD), CtorFn(CF), ModuleMatchQualityFn(MMF),
+    JITMatchQualityFn(JMF), Next(List) {
+  List = this;
+  for (TargetRegistrationListener *L = Listeners; L; L = L->getNext())
+    L->targetRegistered(this);
+}
+
+TargetRegistrationListener::TargetRegistrationListener() {
+  Next = Listeners;
+  if (Next) Next->Prev = &Next;
+  Prev = &Listeners;
+  Listeners = this;
+}
+
+TargetRegistrationListener::~TargetRegistrationListener() {
+  *Prev = Next;
+}
+
 /// getClosestStaticTargetForModule - Given an LLVM module, pick the best target
 /// that is compatible with the module.  If no close target can be found, this
 /// returns null and sets the Error string to a reason.
@@ -36,7 +63,7 @@ TargetMachineRegistry::getClosestStaticTargetForModule(const Module &M,
     return 0;
   } else if (UsableTargets.size() == 1)
     return UsableTargets.back().second;
-  
+
   // Otherwise, take the best target, but make sure we don't have to equally
   // good best targets.
   std::sort(UsableTargets.begin(), UsableTargets.end());
@@ -65,7 +92,7 @@ TargetMachineRegistry::getClosestTargetForJIT(std::string &Error) {
     return 0;
   } else if (UsableTargets.size() == 1)
     return UsableTargets.back().second;
-  
+
   // Otherwise, take the best target.  If there is a tie, just pick one.
   unsigned MaxQual = UsableTargets.front().first;
   const Entry *MaxQualTarget = UsableTargets.front().second;
@@ -75,7 +102,7 @@ TargetMachineRegistry::getClosestTargetForJIT(std::string &Error) {
       MaxQual = UsableTargets[i].first;
       MaxQualTarget = UsableTargets[i].second;
     }
-  
+
   return MaxQualTarget;
 }
-                                    
+