X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=blobdiff_plain;f=include%2Fllvm%2FCodeGen%2FFunctionLoweringInfo.h;h=09a9991912daaa014e38c3ed15588baaf23d08cb;hp=057bd8f84fc37e49d71e898261b0ae7518467a41;hb=HEAD;hpb=4a76317ebb880d4ea3d5fc9e80e9c02a2f69cee3

diff --git a/include/llvm/CodeGen/FunctionLoweringInfo.h b/include/llvm/CodeGen/FunctionLoweringInfo.h
index 057bd8f84fc..09a9991912d 100644
--- a/include/llvm/CodeGen/FunctionLoweringInfo.h
+++ b/include/llvm/CodeGen/FunctionLoweringInfo.h
@@ -18,8 +18,10 @@
 #include "llvm/ADT/APInt.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/IndexedMap.h"
+#include "llvm/ADT/Optional.h"
 #include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/ADT/SmallVector.h"
+#include "llvm/CodeGen/ISDOpcodes.h"
 #include "llvm/CodeGen/MachineBasicBlock.h"
 #include "llvm/IR/InlineAsm.h"
 #include "llvm/IR/Instructions.h"
@@ -50,16 +52,19 @@ class Value;
 /// function that is used when lowering a region of the function.
 ///
 class FunctionLoweringInfo {
-  const TargetMachine &TM;
 public:
   const Function *Fn;
   MachineFunction *MF;
+  const TargetLowering *TLI;
   MachineRegisterInfo *RegInfo;
   BranchProbabilityInfo *BPI;
   /// CanLowerReturn - true iff the function's return value can be lowered to
   /// registers.
   bool CanLowerReturn;
 
+  /// True if part of the CSRs will be handled via explicit copies.
+  bool SplitCSR;
+
   /// DemoteRegister - if CanLowerReturn is false, DemoteRegister is a vreg
   /// allocated to hold a pointer to the hidden sret parameter.
   unsigned DemoteRegister;
@@ -70,7 +75,20 @@ public:
   /// ValueMap - Since we emit code for the function a basic block at a time,
   /// we must remember which virtual registers hold the values for
   /// cross-basic-block values.
-  DenseMap<const Value*, unsigned> ValueMap;
+  DenseMap<const Value *, unsigned> ValueMap;
+
+  /// Track virtual registers created for exception pointers.
+  DenseMap<const Value *, unsigned> CatchPadExceptionPointers;
+
+  // Keep track of frame indices allocated for statepoints as they could be used
+  // across basic block boundaries.
+  // Key of the map is statepoint instruction, value is a map from spilled
+  // llvm Value to the optional stack stack slot index.
+  // If optional is unspecified it means that we have visited this value
+  // but didn't spill it.
+  typedef DenseMap<const Value*, Optional<int>> StatepointSpilledValueMapTy;
+  DenseMap<const Instruction*, StatepointSpilledValueMapTy>
+    StatepointRelocatedValues;
 
   /// StaticAllocaMap - Keep track of frame indices for fixed sized allocas in
   /// the entry block.  This allows the allocas to be efficiently referenced
@@ -87,17 +105,18 @@ public:
   /// RegFixups - Registers which need to be replaced after isel is done.
   DenseMap<unsigned, unsigned> RegFixups;
 
+  /// StatepointStackSlots - A list of temporary stack slots (frame indices)
+  /// used to spill values at a statepoint.  We store them here to enable
+  /// reuse of the same stack slots across different statepoints in different
+  /// basic blocks.
+  SmallVector<unsigned, 50> StatepointStackSlots;
+
   /// MBB - The current block.
   MachineBasicBlock *MBB;
 
   /// MBB - The current insert position inside the current block.
   MachineBasicBlock::iterator InsertPt;
 
-#ifndef NDEBUG
-  SmallPtrSet<const Instruction *, 8> CatchInfoLost;
-  SmallPtrSet<const Instruction *, 8> CatchInfoFound;
-#endif
-
   struct LiveOutInfo {
     unsigned NumSignBits : 31;
     bool IsValid : 1;
@@ -106,6 +125,10 @@ public:
                     KnownZero(1, 0) {}
   };
 
+  /// Record the preferred extend type (ISD::SIGN_EXTEND or ISD::ZERO_EXTEND)
+  /// for a value.
+  DenseMap<const Value *, ISD::NodeType> PreferredExtendType;
+
   /// VisitedBBs - The set of basic blocks visited thus far by instruction
   /// selection.
   SmallPtrSet<const BasicBlock*, 4> VisitedBBs;
@@ -122,8 +145,6 @@ public:
   /// SelectionDAGISel::PrepareEHLandingPad().
   unsigned ExceptionPointerVirtReg, ExceptionSelectorVirtReg;
 
-  explicit FunctionLoweringInfo(const TargetMachine &TM) : TM(TM) {}
-
   /// set - Initialize this FunctionLoweringInfo with the given Function
   /// and its associated MachineFunction.
   ///
@@ -141,10 +162,13 @@ public:
   }
 
   unsigned CreateReg(MVT VT);
-  
+
   unsigned CreateRegs(Type *Ty);
-  
+
   unsigned InitializeRegForValue(const Value *V) {
+    // Tokens never live in vregs.
+    if (V->getType()->isTokenTy())
+      return 0;
     unsigned &R = ValueMap[V];
     assert(R == 0 && "Already initialized this value register!");
     return R = CreateRegs(V->getType());
@@ -197,6 +221,9 @@ public:
       return;
 
     unsigned Reg = It->second;
+    if (Reg == 0)
+      return;
+
     LiveOutRegInfo.grow(Reg);
     LiveOutRegInfo[Reg].IsValid = false;
   }
@@ -208,7 +235,12 @@ public:
   /// getArgumentFrameIndex - Get frame index for the byval argument.
   int getArgumentFrameIndex(const Argument *A);
 
+  unsigned getCatchPadExceptionPointerVReg(const Value *CPI,
+                                           const TargetRegisterClass *RC);
+
 private:
+  void addSEHHandlersForLPads(ArrayRef<const LandingPadInst *> LPads);
+
   /// LiveOutRegInfo - Information about live out vregs.
   IndexedMap<LiveOutInfo, VirtReg2IndexFunctor> LiveOutRegInfo;
 };
@@ -220,11 +252,6 @@ private:
 /// floating-point support.
 void ComputeUsesVAFloatArgument(const CallInst &I, MachineModuleInfo *MMI);
 
-/// AddCatchInfo - Extract the personality and type infos from an eh.selector
-/// call, and add them to the specified machine basic block.
-void AddCatchInfo(const CallInst &I,
-                  MachineModuleInfo *MMI, MachineBasicBlock *MBB);
-
 /// AddLandingPadInfo - Extract the exception handling information from the
 /// landingpad instruction and add them to the specified machine module info.
 void AddLandingPadInfo(const LandingPadInst &I, MachineModuleInfo &MMI,