Publicize the type of FnAllocState.

Prototype option to save state in a global instead of as a Constant in
 the Module. (Turned off, for now, with the on/off switch welded in the off
 position. You get the idea.)

llvm-svn: 9500

2 files changed, 15 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/RegAlloc/PhyRegAlloc.cpp b/llvm/lib/CodeGen/RegAlloc/PhyRegAlloc.cpp
index 82ba0cc693c..e70c90b0394 100644
--- a/llvm/lib/CodeGen/RegAlloc/PhyRegAlloc.cpp
+++ b/llvm/lib/CodeGen/RegAlloc/PhyRegAlloc.cpp
@@ -48,6 +48,12 @@
 
 RegAllocDebugLevel_t DEBUG_RA;
 
+/// The reoptimizer wants to be able to grovel through the register
+/// allocator's state after it has done its job. This is a hack.
+///
+PhyRegAlloc::SavedStateMapTy ExportedFnAllocState;
+const bool SaveStateToModule = false;
+
 static cl::opt<RegAllocDebugLevel_t, true>
 DRA_opt("dregalloc", cl::Hidden, cl::location(DEBUG_RA),
         cl::desc("enable register allocation debugging information"),
@@ -1184,6 +1190,11 @@ bool PhyRegAlloc::doFinalization (Module &M) {
   if (!SaveRegAllocState)
     return false; // Nothing to do here, unless we're saving state.
 
+  if (!SaveStateToModule) {
+    ExportedFnAllocState = FnAllocState;
+    return false;
+  }
+
   // Convert FnAllocState to a single Constant array and add it
   // to the Module.
   ArrayType *AT = ArrayType::get (AllocInfo::getConstantType (), 0);
diff --git a/llvm/lib/CodeGen/RegAlloc/PhyRegAlloc.h b/llvm/lib/CodeGen/RegAlloc/PhyRegAlloc.h
index db23f481615..5fdd60f7ee0 100644
--- a/llvm/lib/CodeGen/RegAlloc/PhyRegAlloc.h
+++ b/llvm/lib/CodeGen/RegAlloc/PhyRegAlloc.h
@@ -85,11 +85,11 @@ class PhyRegAlloc : public FunctionPass {
   AddedInstrns AddedInstrAtEntry;       // to store instrns added at entry
   const LoopInfo *LoopDepthCalc;        // to calculate loop depths 
 
-  std::map<const Function *, std::vector<AllocInfo> > FnAllocState;
-
   PhyRegAlloc(const PhyRegAlloc&);     // DO NOT IMPLEMENT
   void operator=(const PhyRegAlloc&);  // DO NOT IMPLEMENT
 public:
+  typedef std::map<const Function *, std::vector<AllocInfo> > SavedStateMapTy;
+
   inline PhyRegAlloc (const TargetMachine &TM_) :
     TM (TM_), MRI (TM.getRegInfo ()),
     NumOfRegClasses (MRI.getNumOfRegClasses ()) { }
@@ -113,6 +113,8 @@ public:
   inline RegClass *getRegClassByID(unsigned id) { return RegClassList[id]; }
 
 private:
+  SavedStateMapTy FnAllocState;
+
   void addInterference(const Value *Def, const ValueSet *LVSet, 
 		       bool isCallInst);
   bool markAllocatedRegs(MachineInstr* MInst);