changeset 2742:6e3cc55cf54e

merge
author Lukas Stadler <lukas.stadler@jku.at>
date Fri, 20 May 2011 11:15:55 +0200
parents 88123130ede6 a3cd5eb68837
children 55f1db570dfa
files
diffstat 5 files changed, 143 insertions(+), 137 deletions(-) [+]
line wrap: on
line diff
--- a/graal/GraalCompiler/src/com/sun/c1x/graph/GraphBuilder.java	Fri May 20 10:46:15 2011 +0200
+++ b/graal/GraalCompiler/src/com/sun/c1x/graph/GraphBuilder.java	Fri May 20 11:15:55 2011 +0200
@@ -104,7 +104,6 @@
     // Exception handler list
     private List<ExceptionHandler> exceptionHandlers;
 
-    private Block curBlock;                   // the current block
     private final FrameStateBuilder frameState;          // the current execution state
     private Instruction lastInstr;                 // the last instruction added
     private Instruction placeholder;
@@ -182,7 +181,6 @@
         startBlock.firstInstruction = startBlockBegin;
 
         graph.root().setStart(startBlockBegin);
-        curBlock = startBlock;
 
         RiExceptionHandler[] handlers = rootMethod.exceptionHandlers();
         if (handlers != null && handlers.length > 0) {
@@ -200,10 +198,9 @@
         }
 
         assert !loopHeaders.contains(startBlock);
-        startBlockBegin.mergeOrClone(frameState, rootMethod, false);
+        mergeOrClone(startBlockBegin, frameState, false);
 
         // 3. setup internal state for appending instructions
-        curBlock = startBlock;
         lastInstr = startBlockBegin;
         lastInstr.appendNext(null);
 
@@ -273,7 +270,6 @@
 
     private void finishStartBlock(BlockBegin startBlock, Instruction stdEntry) {
         assert bci() == 0;
-        assert curBlock.firstInstruction == startBlock;
         FrameState stateAfter = frameState.create(bci());
         Goto base = new Goto((BlockBegin) stdEntry, stateAfter, graph);
         appendWithBCI(base);
@@ -281,14 +277,67 @@
 //        assert stdEntry instanceof Placeholder;
         assert ((BlockBegin) stdEntry).stateBefore() == null;
         prepareTarget(0);
-        mergeOrClone(stdEntry, stateAfter, method(), loopHeaders.contains(stdEntry));
+        mergeOrClone(stdEntry, stateAfter, loopHeaders.contains(stdEntry));
     }
 
     private void prepareTarget(int bci) {
     }
 
-    private void mergeOrClone(Instruction block, FrameState stateAfter, RiMethod method, boolean loopHeader) {
-        ((BlockBegin) block).mergeOrClone(stateAfter, method, loopHeader);
+
+    public void mergeOrClone(Block target, FrameStateAccess newState) {
+        if (target.isLoopHeader) {
+            assert target.firstInstruction instanceof BlockBegin;
+            mergeOrClone(target.firstInstruction, newState, true);
+
+
+        }
+    }
+
+
+    private void mergeOrClone(Instruction first, FrameStateAccess stateAfter, boolean loopHeader) {
+        if (first instanceof BlockBegin) {
+            BlockBegin block = (BlockBegin) first;
+            FrameState existingState = block.stateBefore();
+
+            if (existingState == null) {
+                // copy state because it is modified
+                FrameState duplicate = stateAfter.duplicate(block.bci());
+
+                // if the block is a loop header, insert all necessary phis
+                if (loopHeader) {
+                    insertLoopPhis(block, duplicate);
+                }
+
+                block.setStateBefore(duplicate);
+            } else {
+                if (!C1XOptions.AssumeVerifiedBytecode && !existingState.isCompatibleWith(stateAfter)) {
+                    // stacks or locks do not match--bytecodes would not verify
+                    throw new CiBailout("stack or locks do not match");
+                }
+
+                assert existingState.localsSize() == stateAfter.localsSize();
+                assert existingState.stackSize() == stateAfter.stackSize();
+
+                existingState.merge(block, stateAfter);
+            }
+        } else {
+            assert false;
+        }
+    }
+
+    private void insertLoopPhis(BlockBegin merge, FrameState newState) {
+        int stackSize = newState.stackSize();
+        for (int i = 0; i < stackSize; i++) {
+            // always insert phis for the stack
+            newState.setupPhiForStack(merge, i);
+        }
+        int localsSize = newState.localsSize();
+        for (int i = 0; i < localsSize; i++) {
+            Value x = newState.localAt(i);
+            if (x != null) {
+                newState.setupPhiForLocal(merge, i);
+            }
+        }
     }
 
     public RiMethod method() {
@@ -303,10 +352,6 @@
         return stream.currentBCI();
     }
 
-    public int nextBCI() {
-        return stream.nextBCI();
-    }
-
     private void loadLocal(int index, CiKind kind) {
         frameState.push(kind, frameState.loadLocal(index));
     }
@@ -421,7 +466,7 @@
         if (oldState != null && dispatchEntry.predecessors().size() == 1) {
             dispatchEntry.setStateBefore(null);
         }
-        dispatchEntry.mergeOrClone(state, null, false);
+        mergeOrClone(dispatchEntry, state, false);
         FrameState mergedState = dispatchEntry.stateBefore();
 
         if (dispatchEntry.next() instanceof ExceptionDispatch) {
@@ -644,35 +689,31 @@
     }
 
     private void genGoto(int fromBCI, int toBCI) {
-        append(new Goto((BlockBegin) blockAt(toBCI), null, graph));
+        append(new Goto((BlockBegin) createTargetAt(toBCI, frameState), null, graph));
     }
 
-    private void ifNode(Value x, Condition cond, Value y, FrameState stateBefore) {
-        Instruction tsucc = blockAt(stream().readBranchDest());
-        Instruction fsucc = blockAt(stream().nextBCI());
+    private void ifNode(Value x, Condition cond, Value y) {
+        Instruction tsucc = createTargetAt(stream().readBranchDest(), frameState);
+        Instruction fsucc = createTargetAt(stream().nextBCI(), frameState);
         append(new If(x, cond, y, (BlockBegin) tsucc, (BlockBegin) fsucc, null, graph));
-        stateBefore.delete();
     }
 
     private void genIfZero(Condition cond) {
         Value y = appendConstant(CiConstant.INT_0);
-        FrameState stateBefore = frameState.create(bci());
         Value x = frameState.ipop();
-        ifNode(x, cond, y, stateBefore);
+        ifNode(x, cond, y);
     }
 
     private void genIfNull(Condition cond) {
-        FrameState stateBefore = frameState.create(bci());
         Value y = appendConstant(CiConstant.NULL_OBJECT);
         Value x = frameState.apop();
-        ifNode(x, cond, y, stateBefore);
+        ifNode(x, cond, y);
     }
 
     private void genIfSame(CiKind kind, Condition cond) {
-        FrameState stateBefore = frameState.create(bci());
         Value y = frameState.pop(kind);
         Value x = frameState.pop(kind);
-        ifNode(x, cond, y, stateBefore);
+        ifNode(x, cond, y);
     }
 
     private void genThrow(int bci) {
@@ -1025,15 +1066,23 @@
         for (int i = 0; i < max; i++) {
             // add all successors to the successor list
             int offset = ts.offsetAt(i);
-            list.add(blockAt(bci + offset));
+            list.add(createTargetAt(bci + offset, frameState));
             isBackwards |= offset < 0; // track if any of the successors are backwards
         }
         int offset = ts.defaultOffset();
         isBackwards |= offset < 0; // if the default successor is backwards
-        list.add(blockAt(bci + offset));
+        list.add(createTargetAt(bci + offset, frameState));
         boolean isSafepoint = isBackwards && !noSafepoints();
-        FrameState stateBefore = isSafepoint ? frameState.create(bci()) : null;
-        append(new TableSwitch(frameState.ipop(), (List) list, ts.lowKey(), stateBefore, graph));
+        FrameState stateAfter = isSafepoint ? frameState.create(bci()) : null;
+        append(new TableSwitch(frameState.ipop(), (List) list, ts.lowKey(), stateAfter, graph));
+    }
+
+    private Instruction createTargetAt(int bci, FrameStateAccess stateAfter) {
+        return createTarget(blockList[bci], stateAfter);
+    }
+
+    private Instruction createTarget(Block block, FrameStateAccess stateAfter) {
+        return block.firstInstruction;
     }
 
     private void genLookupswitch() {
@@ -1046,16 +1095,16 @@
         for (int i = 0; i < max; i++) {
             // add all successors to the successor list
             int offset = ls.offsetAt(i);
-            list.add(blockAt(bci + offset));
+            list.add(createTargetAt(bci + offset, frameState));
             keys[i] = ls.keyAt(i);
             isBackwards |= offset < 0; // track if any of the successors are backwards
         }
         int offset = ls.defaultOffset();
         isBackwards |= offset < 0; // if the default successor is backwards
-        list.add(blockAt(bci + offset));
+        list.add(createTargetAt(bci + offset, frameState));
         boolean isSafepoint = isBackwards && !noSafepoints();
-        FrameState stateBefore = isSafepoint ? frameState.create(bci()) : null;
-        append(new LookupSwitch(frameState.ipop(), (List) list, keys, stateBefore, graph));
+        FrameState stateAfter = isSafepoint ? frameState.create(bci()) : null;
+        append(new LookupSwitch(frameState.ipop(), (List) list, keys, stateAfter, graph));
     }
 
     private Value appendConstant(CiConstant constant) {
@@ -1108,12 +1157,10 @@
     }
 
     private void fillSyncHandler(Value lock, Block syncHandler) {
-        Block origBlock = curBlock;
         FrameState origState = frameState.create(-1);
         Instruction origLast = lastInstr;
 
         lastInstr = syncHandler.firstInstruction;
-        curBlock = syncHandler;
         while (lastInstr.next() != null) {
             // go forward to the end of the block
             lastInstr = lastInstr.next();
@@ -1135,10 +1182,9 @@
 
         genThrow(bci);
         BlockEnd end = (BlockEnd) lastInstr;
-        ((BlockBegin) curBlock.firstInstruction).setEnd(end);
+        ((BlockBegin) syncHandler.firstInstruction).setEnd(end);
         end.setStateAfter(frameState.create(bci()));
 
-        curBlock = origBlock;
         frameState.initializeFrom(origState);
         origState.delete();
         lastInstr = origLast;
@@ -1157,7 +1203,6 @@
             if (!isVisited(block)) {
                 markVisited(block);
                 // now parse the block
-                curBlock = block;
                 if (block.firstInstruction instanceof Placeholder) {
                     assert false;
                     placeholder = block.firstInstruction;
@@ -1171,25 +1216,26 @@
                 }
                 assert block.firstInstruction.next() == null;
 
-                iterateBytecodesForBlock(block.startBci);
+                iterateBytecodesForBlock(block);
             }
         }
     }
 
-    private BlockEnd iterateBytecodesForBlock(int bci) {
+    private BlockEnd iterateBytecodesForBlock(Block block) {
         assert frameState != null;
-        stream.setBCI(bci);
 
-        BlockBegin block = (BlockBegin) curBlock.firstInstruction;
+        stream.setBCI(block.startBci);
+
         BlockEnd end = null;
         int endBCI = stream.endBCI();
         boolean blockStart = true;
 
+        int bci = block.startBci;
         while (bci < endBCI) {
-            Instruction nextBlock = blockAtOrNull(bci);
+            Block nextBlock = blockList[bci];
             if (nextBlock != null && nextBlock != block) {
                 // we fell through to the next block, add a goto and break
-                end = new Goto((BlockBegin) nextBlock, null, graph);
+                end = new Goto((BlockBegin) nextBlock.firstInstruction, null, graph);
                 lastInstr = lastInstr.appendNext(end);
                 break;
             }
@@ -1197,8 +1243,8 @@
             int opcode = stream.currentBC();
 
             traceState();
-            traceInstruction(bci, stream, opcode, blockStart);
-            processBytecode(bci, stream, opcode);
+            traceInstruction(bci, opcode, blockStart);
+            processBytecode(bci, opcode);
 
             if (lastInstr instanceof BlockEnd) {
                 end = (BlockEnd) lastInstr;
@@ -1225,12 +1271,14 @@
         assert end != null : "end should exist after iterating over bytecodes";
         FrameState stateAtEnd = frameState.create(bci());
         end.setStateAfter(stateAtEnd);
-        block.setEnd(end);
+        if (block.firstInstruction instanceof BlockBegin) {
+            ((BlockBegin) block.firstInstruction).setEnd(end);
+        }
 
         // propagate the state
         for (BlockBegin succ : end.blockSuccessors()) {
-            assert succ.blockPredecessors().contains(block.end());
-            succ.mergeOrClone(stateAtEnd, method(), loopHeaders.contains(succ));
+            assert succ.blockPredecessors().contains(end);
+            mergeOrClone(succ, stateAtEnd, loopHeaders.contains(succ));
             addToWorkList(blockList[succ.bci()]);
         }
         return end;
@@ -1254,7 +1302,7 @@
         }
     }
 
-    private void processBytecode(int bci, BytecodeStream s, int opcode) {
+    private void processBytecode(int bci, int opcode) {
         int cpi;
 
         // Checkstyle: stop
@@ -1275,16 +1323,16 @@
             case FCONST_2       : frameState.fpush(appendConstant(CiConstant.FLOAT_2)); break;
             case DCONST_0       : frameState.dpush(appendConstant(CiConstant.DOUBLE_0)); break;
             case DCONST_1       : frameState.dpush(appendConstant(CiConstant.DOUBLE_1)); break;
-            case BIPUSH         : frameState.ipush(appendConstant(CiConstant.forInt(s.readByte()))); break;
-            case SIPUSH         : frameState.ipush(appendConstant(CiConstant.forInt(s.readShort()))); break;
+            case BIPUSH         : frameState.ipush(appendConstant(CiConstant.forInt(stream.readByte()))); break;
+            case SIPUSH         : frameState.ipush(appendConstant(CiConstant.forInt(stream.readShort()))); break;
             case LDC            : // fall through
             case LDC_W          : // fall through
-            case LDC2_W         : genLoadConstant(s.readCPI()); break;
-            case ILOAD          : loadLocal(s.readLocalIndex(), CiKind.Int); break;
-            case LLOAD          : loadLocal(s.readLocalIndex(), CiKind.Long); break;
-            case FLOAD          : loadLocal(s.readLocalIndex(), CiKind.Float); break;
-            case DLOAD          : loadLocal(s.readLocalIndex(), CiKind.Double); break;
-            case ALOAD          : loadLocal(s.readLocalIndex(), CiKind.Object); break;
+            case LDC2_W         : genLoadConstant(stream.readCPI()); break;
+            case ILOAD          : loadLocal(stream.readLocalIndex(), CiKind.Int); break;
+            case LLOAD          : loadLocal(stream.readLocalIndex(), CiKind.Long); break;
+            case FLOAD          : loadLocal(stream.readLocalIndex(), CiKind.Float); break;
+            case DLOAD          : loadLocal(stream.readLocalIndex(), CiKind.Double); break;
+            case ALOAD          : loadLocal(stream.readLocalIndex(), CiKind.Object); break;
             case ILOAD_0        : // fall through
             case ILOAD_1        : // fall through
             case ILOAD_2        : // fall through
@@ -1313,11 +1361,11 @@
             case BALOAD         : genLoadIndexed(CiKind.Byte  ); break;
             case CALOAD         : genLoadIndexed(CiKind.Char  ); break;
             case SALOAD         : genLoadIndexed(CiKind.Short ); break;
-            case ISTORE         : storeLocal(CiKind.Int, s.readLocalIndex()); break;
-            case LSTORE         : storeLocal(CiKind.Long, s.readLocalIndex()); break;
-            case FSTORE         : storeLocal(CiKind.Float, s.readLocalIndex()); break;
-            case DSTORE         : storeLocal(CiKind.Double, s.readLocalIndex()); break;
-            case ASTORE         : storeLocal(CiKind.Object, s.readLocalIndex()); break;
+            case ISTORE         : storeLocal(CiKind.Int, stream.readLocalIndex()); break;
+            case LSTORE         : storeLocal(CiKind.Long, stream.readLocalIndex()); break;
+            case FSTORE         : storeLocal(CiKind.Float, stream.readLocalIndex()); break;
+            case DSTORE         : storeLocal(CiKind.Double, stream.readLocalIndex()); break;
+            case ASTORE         : storeLocal(CiKind.Object, stream.readLocalIndex()); break;
             case ISTORE_0       : // fall through
             case ISTORE_1       : // fall through
             case ISTORE_2       : // fall through
@@ -1426,9 +1474,9 @@
             case IF_ICMPLE      : genIfSame(CiKind.Int, Condition.LE); break;
             case IF_ACMPEQ      : genIfSame(frameState.peekKind(), Condition.EQ); break;
             case IF_ACMPNE      : genIfSame(frameState.peekKind(), Condition.NE); break;
-            case GOTO           : genGoto(s.currentBCI(), s.readBranchDest()); break;
-            case JSR            : genJsr(s.readBranchDest()); break;
-            case RET            : genRet(s.readLocalIndex()); break;
+            case GOTO           : genGoto(stream.currentBCI(), stream.readBranchDest()); break;
+            case JSR            : genJsr(stream.readBranchDest()); break;
+            case RET            : genRet(stream.readLocalIndex()); break;
             case TABLESWITCH    : genTableswitch(); break;
             case LOOKUPSWITCH   : genLookupswitch(); break;
             case IRETURN        : genReturn(frameState.ipop()); break;
@@ -1437,28 +1485,28 @@
             case DRETURN        : genReturn(frameState.dpop()); break;
             case ARETURN        : genReturn(frameState.apop()); break;
             case RETURN         : genReturn(null  ); break;
-            case GETSTATIC      : cpi = s.readCPI(); genGetStatic(cpi, constantPool().lookupField(cpi, opcode)); break;
-            case PUTSTATIC      : cpi = s.readCPI(); genPutStatic(cpi, constantPool().lookupField(cpi, opcode)); break;
-            case GETFIELD       : cpi = s.readCPI(); genGetField(cpi, constantPool().lookupField(cpi, opcode)); break;
-            case PUTFIELD       : cpi = s.readCPI(); genPutField(cpi, constantPool().lookupField(cpi, opcode)); break;
-            case INVOKEVIRTUAL  : cpi = s.readCPI(); genInvokeVirtual(constantPool().lookupMethod(cpi, opcode), cpi, constantPool()); break;
-            case INVOKESPECIAL  : cpi = s.readCPI(); genInvokeSpecial(constantPool().lookupMethod(cpi, opcode), null, cpi, constantPool()); break;
-            case INVOKESTATIC   : cpi = s.readCPI(); genInvokeStatic(constantPool().lookupMethod(cpi, opcode), cpi, constantPool()); break;
-            case INVOKEINTERFACE: cpi = s.readCPI(); genInvokeInterface(constantPool().lookupMethod(cpi, opcode), cpi, constantPool()); break;
-            case NEW            : genNewInstance(s.readCPI()); break;
-            case NEWARRAY       : genNewTypeArray(s.readLocalIndex()); break;
-            case ANEWARRAY      : genNewObjectArray(s.readCPI()); break;
+            case GETSTATIC      : cpi = stream.readCPI(); genGetStatic(cpi, constantPool().lookupField(cpi, opcode)); break;
+            case PUTSTATIC      : cpi = stream.readCPI(); genPutStatic(cpi, constantPool().lookupField(cpi, opcode)); break;
+            case GETFIELD       : cpi = stream.readCPI(); genGetField(cpi, constantPool().lookupField(cpi, opcode)); break;
+            case PUTFIELD       : cpi = stream.readCPI(); genPutField(cpi, constantPool().lookupField(cpi, opcode)); break;
+            case INVOKEVIRTUAL  : cpi = stream.readCPI(); genInvokeVirtual(constantPool().lookupMethod(cpi, opcode), cpi, constantPool()); break;
+            case INVOKESPECIAL  : cpi = stream.readCPI(); genInvokeSpecial(constantPool().lookupMethod(cpi, opcode), null, cpi, constantPool()); break;
+            case INVOKESTATIC   : cpi = stream.readCPI(); genInvokeStatic(constantPool().lookupMethod(cpi, opcode), cpi, constantPool()); break;
+            case INVOKEINTERFACE: cpi = stream.readCPI(); genInvokeInterface(constantPool().lookupMethod(cpi, opcode), cpi, constantPool()); break;
+            case NEW            : genNewInstance(stream.readCPI()); break;
+            case NEWARRAY       : genNewTypeArray(stream.readLocalIndex()); break;
+            case ANEWARRAY      : genNewObjectArray(stream.readCPI()); break;
             case ARRAYLENGTH    : genArrayLength(); break;
-            case ATHROW         : genThrow(s.currentBCI()); break;
+            case ATHROW         : genThrow(stream.currentBCI()); break;
             case CHECKCAST      : genCheckCast(); break;
             case INSTANCEOF     : genInstanceOf(); break;
-            case MONITORENTER   : genMonitorEnter(frameState.apop(), s.currentBCI()); break;
-            case MONITOREXIT    : genMonitorExit(frameState.apop(), s.currentBCI()); break;
-            case MULTIANEWARRAY : genNewMultiArray(s.readCPI()); break;
+            case MONITORENTER   : genMonitorEnter(frameState.apop(), stream.currentBCI()); break;
+            case MONITOREXIT    : genMonitorExit(frameState.apop(), stream.currentBCI()); break;
+            case MULTIANEWARRAY : genNewMultiArray(stream.readCPI()); break;
             case IFNULL         : genIfNull(Condition.EQ); break;
             case IFNONNULL      : genIfNull(Condition.NE); break;
-            case GOTO_W         : genGoto(s.currentBCI(), s.readFarBranchDest()); break;
-            case JSR_W          : genJsr(s.readFarBranchDest()); break;
+            case GOTO_W         : genGoto(stream.currentBCI(), stream.readFarBranchDest()); break;
+            case JSR_W          : genJsr(stream.readFarBranchDest()); break;
             case BREAKPOINT:
                 throw new CiBailout("concurrent setting of breakpoint");
             default:
@@ -1467,7 +1515,7 @@
         // Checkstyle: resume
     }
 
-    private void traceInstruction(int bci, BytecodeStream s, int opcode, boolean blockStart) {
+    private void traceInstruction(int bci, int opcode, boolean blockStart) {
         if (C1XOptions.TraceBytecodeParserLevel >= TRACELEVEL_INSTRUCTIONS && !TTY.isSuppressed()) {
             StringBuilder sb = new StringBuilder(40);
             sb.append(blockStart ? '+' : '|');
@@ -1477,8 +1525,8 @@
                 sb.append(' ');
             }
             sb.append(bci).append(": ").append(Bytecodes.nameOf(opcode));
-            for (int i = bci + 1; i < s.nextBCI(); ++i) {
-                sb.append(' ').append(s.readUByte(i));
+            for (int i = bci + 1; i < stream.nextBCI(); ++i) {
+                sb.append(' ').append(stream.readUByte(i));
             }
             log.println(sb.toString());
         }
--- a/graal/GraalCompiler/src/com/sun/c1x/ir/BlockBegin.java	Fri May 20 10:46:15 2011 +0200
+++ b/graal/GraalCompiler/src/com/sun/c1x/ir/BlockBegin.java	Fri May 20 11:15:55 2011 +0200
@@ -78,7 +78,6 @@
      */
     public final int blockID;
 
-    private int depthFirstNumber;
     private int linearScanNumber;
 
     // LIR block
@@ -251,54 +250,13 @@
         v.visitBlockBegin(this);
     }
 
-    public void mergeOrClone(FrameStateAccess newState, RiMethod method, boolean loopHeader) {
-        FrameState existingState = stateBefore();
-
-        if (existingState == null) {
-            // copy state because it is modified
-            FrameState duplicate = newState.duplicate(bci());
-
-            // if the block is a loop header, insert all necessary phis
-            if (loopHeader) {
-                insertLoopPhis(duplicate);
-            }
-
-            setStateBefore(duplicate);
-        } else {
-            if (!C1XOptions.AssumeVerifiedBytecode && !existingState.isCompatibleWith(newState)) {
-                // stacks or locks do not match--bytecodes would not verify
-                throw new CiBailout("stack or locks do not match");
-            }
-
-            assert existingState.localsSize() == newState.localsSize();
-            assert existingState.stackSize() == newState.stackSize();
-
-            existingState.merge(this, newState);
-        }
-    }
-
-    private void insertLoopPhis(FrameState newState) {
-        int stackSize = newState.stackSize();
-        for (int i = 0; i < stackSize; i++) {
-            // always insert phis for the stack
-            newState.setupPhiForStack(this, i);
-        }
-        int localsSize = newState.localsSize();
-        for (int i = 0; i < localsSize; i++) {
-            Value x = newState.localAt(i);
-            if (x != null) {
-                newState.setupPhiForLocal(this, i);
-            }
-        }
-    }
-
     @Override
     public String toString() {
         StringBuilder builder = new StringBuilder();
         builder.append("block #");
         builder.append(blockID);
         builder.append(",");
-        builder.append(depthFirstNumber);
+        builder.append(blockID); // was: depthFirstNumber
         builder.append(" [");
 
         builder.append("]");
--- a/graal/GraalCompiler/src/com/sun/c1x/ir/LookupSwitch.java	Fri May 20 10:46:15 2011 +0200
+++ b/graal/GraalCompiler/src/com/sun/c1x/ir/LookupSwitch.java	Fri May 20 11:15:55 2011 +0200
@@ -46,12 +46,12 @@
      * @param value the instruction producing the value being switched on
      * @param successors the list of successors
      * @param keys the list of keys, sorted
-     * @param stateBefore the state before the switch
+     * @param stateAfter the state after the switch
      * @param isSafepoint {@code true} if this instruction is a safepoint
      * @param graph
      */
-    public LookupSwitch(Value value, List<BlockBegin> successors, int[] keys, FrameState stateBefore, Graph graph) {
-        super(value, successors, stateBefore, INPUT_COUNT, SUCCESSOR_COUNT, graph);
+    public LookupSwitch(Value value, List<BlockBegin> successors, int[] keys, FrameState stateAfter, Graph graph) {
+        super(value, successors, stateAfter, INPUT_COUNT, SUCCESSOR_COUNT, graph);
         this.keys = keys;
     }
 
--- a/graal/GraalCompiler/src/com/sun/c1x/ir/Switch.java	Fri May 20 10:46:15 2011 +0200
+++ b/graal/GraalCompiler/src/com/sun/c1x/ir/Switch.java	Fri May 20 11:15:55 2011 +0200
@@ -63,12 +63,12 @@
      * Constructs a new Switch.
      * @param value the instruction that provides the value to be switched over
      * @param successors the list of successors of this switch
-     * @param stateBefore the state before the switch
+     * @param stateAfter the state after the switch
      * @param isSafepoint {@code true} if this switch is a safepoint
      * @param graph
      */
-    public Switch(Value value, List<BlockBegin> successors, FrameState stateBefore, int inputCount, int successorCount, Graph graph) {
-        super(CiKind.Illegal, stateBefore, successors, inputCount + INPUT_COUNT, successorCount + SUCCESSOR_COUNT, graph);
+    public Switch(Value value, List<BlockBegin> successors, FrameState stateAfter, int inputCount, int successorCount, Graph graph) {
+        super(CiKind.Illegal, stateAfter, successors, inputCount + INPUT_COUNT, successorCount + SUCCESSOR_COUNT, graph);
         setValue(value);
     }
 
--- a/graal/GraalCompiler/src/com/sun/c1x/ir/TableSwitch.java	Fri May 20 10:46:15 2011 +0200
+++ b/graal/GraalCompiler/src/com/sun/c1x/ir/TableSwitch.java	Fri May 20 11:15:55 2011 +0200
@@ -45,12 +45,12 @@
      * @param value the instruction producing the value being switched on
      * @param successors the list of successors
      * @param lowKey the lowest integer key in the table
-     * @param stateBefore the state before the switch
+     * @param stateAfter the state after the switch
      * @param isSafepoint {@code true} if this instruction is a safepoint
      * @param graph
      */
-    public TableSwitch(Value value, List<BlockBegin> successors, int lowKey, FrameState stateBefore, Graph graph) {
-        super(value, successors, stateBefore, INPUT_COUNT, SUCCESSOR_COUNT, graph);
+    public TableSwitch(Value value, List<BlockBegin> successors, int lowKey, FrameState stateAfter, Graph graph) {
+        super(value, successors, stateAfter, INPUT_COUNT, SUCCESSOR_COUNT, graph);
         this.lowKey = lowKey;
     }