Remove attribution from file headers, per discussion on llvmdev.

[oota-llvm.git] / lib / Target / ARM / ARMConstantIslandPass.cpp

diff --git a/lib/Target/ARM/ARMConstantIslandPass.cpp b/lib/Target/ARM/ARMConstantIslandPass.cpp
index 405ac0a2c685e1b5f2443e0a3f77949db85727f0..9aced30f0136e2e038e62558585ed70a63500de4 100644 (file)
--- a/lib/Target/ARM/ARMConstantIslandPass.cpp
+++ b/lib/Target/ARM/ARMConstantIslandPass.cpp
@@ -2,8 +2,8 @@
 //
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by Chris Lattner 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.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -112,7 +112,7 @@ namespace {
         : MI(mi), MaxDisp(maxdisp), isCond(cond), UncondBr(ubr) {}
     };
 
-    /// Branches - Keep track of all the immediate branch instructions.
+    /// ImmBranches - Keep track of all the immediate branch instructions.
     ///
     std::vector<ImmBranch> ImmBranches;
 
@@ -128,7 +128,7 @@ namespace {
     ARMFunctionInfo *AFI;
     bool isThumb;
   public:
-    static const char ID;
+    static char ID;
     ARMConstantIslands() : MachineFunctionPass((intptr_t)&ID) {}
 
     virtual bool runOnMachineFunction(MachineFunction &Fn);
@@ -161,7 +161,7 @@ namespace {
                       MachineInstr *CPEMI, unsigned Disp,
                       bool DoDump);
     bool WaterIsInRange(unsigned UserOffset, MachineBasicBlock *Water,
-                        unsigned Disp);
+                        CPUser &U);
     bool OffsetIsInRange(unsigned UserOffset, unsigned TrialOffset,
                         unsigned Disp, bool NegativeOK);
     bool BBIsInRange(MachineInstr *MI, MachineBasicBlock *BB, unsigned Disp);
@@ -174,7 +174,7 @@ namespace {
     void dumpBBs();
     void verify(MachineFunction &Fn);
   };
-  const char ARMConstantIslands::ID = 0;
+  char ARMConstantIslands::ID = 0;
 }
 
 /// verify - check BBOffsets, BBSizes, alignment of islands
@@ -199,8 +199,8 @@ void ARMConstantIslands::verify(MachineFunction &Fn) {
 /// print block size and offset information - debugging
 void ARMConstantIslands::dumpBBs() {
   for (unsigned J = 0, E = BBOffsets.size(); J !=E; ++J) {
-    DOUT << "block" << J << " offset" << BBOffsets[J] << 
-                            " size" << BBSizes[J] << "\n";
+    DOUT << "block " << J << " offset " << BBOffsets[J] << 
+                            " size " << BBSizes[J] << "\n";
   }
 }
 
@@ -298,7 +298,7 @@ void ARMConstantIslands::DoInitialPlacement(MachineFunction &Fn,
   
   const TargetData &TD = *Fn.getTarget().getTargetData();
   for (unsigned i = 0, e = CPs.size(); i != e; ++i) {
-    unsigned Size = TD.getTypeSize(CPs[i].getType());
+    unsigned Size = TD.getABITypeSize(CPs[i].getType());
     // Verify that all constant pool entries are a multiple of 4 bytes.  If not,
     // we would have to pad them out or something so that instructions stay
     // aligned.
@@ -668,8 +668,9 @@ bool ARMConstantIslands::OffsetIsInRange(unsigned UserOffset,
 /// Water (a basic block) will be in range for the specific MI.
 
 bool ARMConstantIslands::WaterIsInRange(unsigned UserOffset,
-                         MachineBasicBlock* Water, unsigned MaxDisp)
+                         MachineBasicBlock* Water, CPUser &U)
 {
+  unsigned MaxDisp = U.MaxDisp;
   MachineFunction::iterator I = next(MachineFunction::iterator(Water));
   unsigned CPEOffset = BBOffsets[Water->getNumber()] + 
                        BBSizes[Water->getNumber()];
@@ -678,7 +679,7 @@ bool ARMConstantIslands::WaterIsInRange(unsigned UserOffset,
   // the offset of the instruction.  (Currently applies only to ARM, so
   // no alignment compensation attempted here.)
   if (CPEOffset < UserOffset)
-    UserOffset += 4;
+    UserOffset += U.CPEMI->getOperand(2).getImm();
 
   return OffsetIsInRange (UserOffset, CPEOffset, MaxDisp, !isThumb);
 }
@@ -739,14 +740,11 @@ void ARMConstantIslands::AdjustBBOffsetsAfter(MachineBasicBlock *BB,
             delta -= 2;
           }
         }
-        // Thumb jump tables require padding.  They can be at the end, or
-        // followed by an unconditional branch.
+        // Thumb jump tables require padding.  They should be at the end;
+        // following unconditional branches are removed by AnalyzeBranch.
         MachineInstr *ThumbJTMI = NULL;
         if (prior(MBB->end())->getOpcode() == ARM::tBR_JTr)
           ThumbJTMI = prior(MBB->end());
-        else if (prior(MBB->end()) != MBB->begin() &&
-                prior(prior(MBB->end()))->getOpcode() == ARM::tBR_JTr)
-          ThumbJTMI = prior(prior(MBB->end()));
         if (ThumbJTMI) {
           unsigned newMIOffset = GetOffsetOf(ThumbJTMI);
           unsigned oldMIOffset = newMIOffset - delta;
@@ -869,7 +867,7 @@ bool ARMConstantIslands::LookForWater(CPUser &U, unsigned UserOffset,
     for (std::vector<MachineBasicBlock*>::iterator IP = prior(WaterList.end()),
         B = WaterList.begin();; --IP) {
       MachineBasicBlock* WaterBB = *IP;
-      if (WaterIsInRange(UserOffset, WaterBB, U.MaxDisp)) {
+      if (WaterIsInRange(UserOffset, WaterBB, U)) {
         if (isThumb &&
             (BBOffsets[WaterBB->getNumber()] + 
              BBSizes[WaterBB->getNumber()])%4 != 0) {
@@ -1192,6 +1190,7 @@ ARMConstantIslands::FixUpConditionalBr(MachineFunction &Fn, ImmBranch &Br) {
   // L2:
   ARMCC::CondCodes CC = (ARMCC::CondCodes)MI->getOperand(1).getImmedValue();
   CC = ARMCC::getOppositeCondition(CC);
+  unsigned CCReg = MI->getOperand(2).getReg();
 
   // If the branch is at the end of its MBB and that has a fall-through block,
   // direct the updated conditional branch to the fall-through block. Otherwise,
@@ -1241,7 +1240,8 @@ ARMConstantIslands::FixUpConditionalBr(MachineFunction &Fn, ImmBranch &Br) {
 
   // Insert a new conditional branch and a new unconditional branch.
   // Also update the ImmBranch as well as adding a new entry for the new branch.
-  BuildMI(MBB, TII->get(MI->getOpcode())).addMBB(NextBB).addImm(CC);
+  BuildMI(MBB, TII->get(MI->getOpcode())).addMBB(NextBB)
+    .addImm(CC).addReg(CCReg);
   Br.MI = &MBB->back();
   BBSizes[MBB->getNumber()] += ARM::GetInstSize(&MBB->back());
   BuildMI(MBB, TII->get(Br.UncondBr)).addMBB(DestBB);
@@ -1265,12 +1265,12 @@ bool ARMConstantIslands::UndoLRSpillRestore() {
   bool MadeChange = false;
   for (unsigned i = 0, e = PushPopMIs.size(); i != e; ++i) {
     MachineInstr *MI = PushPopMIs[i];
-    if (MI->getNumOperands() == 1) {
-        if (MI->getOpcode() == ARM::tPOP_RET &&
-            MI->getOperand(0).getReg() == ARM::PC)
-          BuildMI(MI->getParent(), TII->get(ARM::tBX_RET));
-        MI->eraseFromParent();
-        MadeChange = true;
+    if (MI->getOpcode() == ARM::tPOP_RET &&
+        MI->getOperand(0).getReg() == ARM::PC &&
+        MI->getNumExplicitOperands() == 1) {
+      BuildMI(MI->getParent(), TII->get(ARM::tBX_RET));
+      MI->eraseFromParent();
+      MadeChange = true;
     }
   }
   return MadeChange;