I cannot find a libgcc function for this builtin. Therefor expanding it to a noop...

[oota-llvm.git] / lib / CodeGen / VirtRegMap.h

diff --git a/lib/CodeGen/VirtRegMap.h b/lib/CodeGen/VirtRegMap.h
index 7ca06bbd1a348076a3ba078b9228e1e051dc14d5..a7f47deaf274faf404dda4a2f7fec5229c731357 100644 (file)
--- a/lib/CodeGen/VirtRegMap.h
+++ b/lib/CodeGen/VirtRegMap.h
@@ -2,8 +2,8 @@
 //
 //                     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.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -17,7 +17,7 @@
 #ifndef LLVM_CODEGEN_VIRTREGMAP_H
 #define LLVM_CODEGEN_VIRTREGMAP_H
 
-#include "llvm/Target/MRegisterInfo.h"
+#include "llvm/Target/TargetRegisterInfo.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/IndexedMap.h"
 #include "llvm/Support/Streams.h"
@@ -66,6 +66,10 @@ namespace llvm {
     /// mapping.
     IndexedMap<unsigned, VirtReg2IndexFunctor> Virt2SplitMap;
 
+    /// Virt2SplitKillMap - This is splitted virtual register to its last use
+    /// (kill) index mapping.
+    IndexedMap<unsigned> Virt2SplitKillMap;
+
     /// ReMatMap - This is virtual register to re-materialized instruction
     /// mapping. Each virtual register whose definition is going to be
     /// re-materialized has an entry in it.
@@ -80,7 +84,8 @@ namespace llvm {
     /// SpillPt2VirtMap - This records the virtual registers which should
     /// be spilled right after the MachineInstr due to live interval
     /// splitting.
-    std::map<MachineInstr*, std::vector<unsigned> > SpillPt2VirtMap;
+    std::map<MachineInstr*, std::vector<std::pair<unsigned,bool> > >
+    SpillPt2VirtMap;
 
     /// RestorePt2VirtMap - This records the virtual registers which should
     /// be restored right before the MachineInstr due to live interval
@@ -110,15 +115,15 @@ namespace llvm {
     /// @brief returns the physical register mapped to the specified
     /// virtual register
     unsigned getPhys(unsigned virtReg) const {
-      assert(MRegisterInfo::isVirtualRegister(virtReg));
+      assert(TargetRegisterInfo::isVirtualRegister(virtReg));
       return Virt2PhysMap[virtReg];
     }
 
     /// @brief creates a mapping for the specified virtual register to
     /// the specified physical register
     void assignVirt2Phys(unsigned virtReg, unsigned physReg) {
-      assert(MRegisterInfo::isVirtualRegister(virtReg) &&
-             MRegisterInfo::isPhysicalRegister(physReg));
+      assert(TargetRegisterInfo::isVirtualRegister(virtReg) &&
+             TargetRegisterInfo::isPhysicalRegister(physReg));
       assert(Virt2PhysMap[virtReg] == NO_PHYS_REG &&
              "attempt to assign physical register to already mapped "
              "virtual register");
@@ -128,7 +133,7 @@ namespace llvm {
     /// @brief clears the specified virtual register's, physical
     /// register mapping
     void clearVirt(unsigned virtReg) {
-      assert(MRegisterInfo::isVirtualRegister(virtReg));
+      assert(TargetRegisterInfo::isVirtualRegister(virtReg));
       assert(Virt2PhysMap[virtReg] != NO_PHYS_REG &&
              "attempt to clear a not assigned virtual register");
       Virt2PhysMap[virtReg] = NO_PHYS_REG;
@@ -164,14 +169,14 @@ namespace llvm {
     /// @brief returns the stack slot mapped to the specified virtual
     /// register
     int getStackSlot(unsigned virtReg) const {
-      assert(MRegisterInfo::isVirtualRegister(virtReg));
+      assert(TargetRegisterInfo::isVirtualRegister(virtReg));
       return Virt2StackSlotMap[virtReg];
     }
 
     /// @brief returns the rematerialization id mapped to the specified virtual
     /// register
     int getReMatId(unsigned virtReg) const {
-      assert(MRegisterInfo::isVirtualRegister(virtReg));
+      assert(TargetRegisterInfo::isVirtualRegister(virtReg));
       return Virt2ReMatIdMap[virtReg];
     }
 
@@ -209,6 +214,20 @@ namespace llvm {
       ReMatMap[virtReg] = def;
     }
 
+    /// @brief record the last use (kill) of a split virtual register.
+    void addKillPoint(unsigned virtReg, unsigned index) {
+      Virt2SplitKillMap[virtReg] = index;
+    }
+
+    unsigned getKillPoint(unsigned virtReg) const {
+      return Virt2SplitKillMap[virtReg];
+    }
+
+    /// @brief remove the last use (kill) of a split virtual register.
+    void removeKillPoint(unsigned virtReg) {
+      Virt2SplitKillMap[virtReg] = 0;
+    }
+
     /// @brief returns true if the specified MachineInstr is a spill point.
     bool isSpillPt(MachineInstr *Pt) const {
       return SpillPt2VirtMap.find(Pt) != SpillPt2VirtMap.end();
@@ -216,30 +235,31 @@ namespace llvm {
 
     /// @brief returns the virtual registers that should be spilled due to
     /// splitting right after the specified MachineInstr.
-    std::vector<unsigned> &getSpillPtSpills(MachineInstr *Pt) {
+    std::vector<std::pair<unsigned,bool> > &getSpillPtSpills(MachineInstr *Pt) {
       return SpillPt2VirtMap[Pt];
     }
 
     /// @brief records the specified MachineInstr as a spill point for virtReg.
-    void addSpillPoint(unsigned virtReg, MachineInstr *Pt) {
+    void addSpillPoint(unsigned virtReg, bool isKill, MachineInstr *Pt) {
       if (SpillPt2VirtMap.find(Pt) != SpillPt2VirtMap.end())
-        SpillPt2VirtMap[Pt].push_back(virtReg);
+        SpillPt2VirtMap[Pt].push_back(std::make_pair(virtReg, isKill));
       else {
-        std::vector<unsigned> Virts;
-        Virts.push_back(virtReg);
+        std::vector<std::pair<unsigned,bool> > Virts;
+        Virts.push_back(std::make_pair(virtReg, isKill));
         SpillPt2VirtMap.insert(std::make_pair(Pt, Virts));
       }
     }
 
     void transferSpillPts(MachineInstr *Old, MachineInstr *New) {
-      std::map<MachineInstr*,std::vector<unsigned> >::iterator I =
-        SpillPt2VirtMap.find(Old);
+      std::map<MachineInstr*,std::vector<std::pair<unsigned,bool> > >::iterator
+        I = SpillPt2VirtMap.find(Old);
       if (I == SpillPt2VirtMap.end())
         return;
       while (!I->second.empty()) {
-        unsigned virtReg = I->second.back();
+        unsigned virtReg = I->second.back().first;
+        bool isKill = I->second.back().second;
         I->second.pop_back();
-        addSpillPoint(virtReg, New);
+        addSpillPoint(virtReg, isKill, New);
       }
       SpillPt2VirtMap.erase(I);
     }
@@ -280,10 +300,9 @@ namespace llvm {
     }
 
     /// @brief Updates information about the specified virtual register's value
-    /// folded into newMI machine instruction.  The OpNum argument indicates the
-    /// operand number of OldMI that is folded.
-    void virtFolded(unsigned VirtReg, MachineInstr *OldMI, unsigned OpNum,
-                    MachineInstr *NewMI);
+    /// folded into newMI machine instruction.
+    void virtFolded(unsigned VirtReg, MachineInstr *OldMI, MachineInstr *NewMI,
+                    ModRef MRInfo);
 
     /// @brief Updates information about the specified virtual register's value
     /// folded into the specified machine instruction.