Examples with LLVMPendingSpecialRegisterRead com.oracle.svm.core.graal.llvm.util.LLVMUtils.LLVMPendingSpecialRegisterRead used on opensource projects

Example 1 with LLVMPendingSpecialRegisterRead

use of com.oracle.svm.core.graal.llvm.util.LLVMUtils.LLVMPendingSpecialRegisterRead in project graal by oracle.

the class NodeLLVMBuilder method doBlock.

@Override
public void doBlock(Block block, StructuredGraph graph, BlockMap<List<Node>> blockMap) {
    assert !processedBlocks.contains(block) : "Block already processed " + block;
    assert verifyPredecessors(block);
    gen.beginBlock(block);
    if (block == graph.getLastSchedule().getCFG().getStartBlock()) {
        assert block.getPredecessorCount() == 0;
        long startPatchpointID = LLVMGenerator.nextPatchpointId.getAndIncrement();
        builder.buildStackmap(builder.constantLong(startPatchpointID));
        gen.getCompilationResult().recordInfopoint(NumUtil.safeToInt(startPatchpointID), null, InfopointReason.METHOD_START);
        for (ParameterNode param : graph.getNodes(ParameterNode.TYPE)) {
            int offset = (gen.isEntryPoint() ? 0 : SpecialRegister.count());
            LLVMValueRef paramValue = builder.getFunctionParam(param.index() + offset);
            setResult(param, paramValue);
        }
        for (SpecialRegister reg : SpecialRegister.registers()) {
            gen.setInitialSpecialRegisterValue(reg, gen.isEntryPoint() ? builder.constantNull(builder.wordType()) : builder.getFunctionParam(reg.getIndex()));
        }
        gen.getDebugInfoPrinter().printFunction(graph, this);
    } else {
        assert block.getPredecessorCount() > 0;
        // create phi-in value array
        AbstractBeginNode begin = block.getBeginNode();
        if (begin instanceof AbstractMergeNode) {
            AbstractMergeNode merge = (AbstractMergeNode) begin;
            for (SpecialRegister reg : SpecialRegister.registers()) {
                List<LLVMValueRef> forwardPredValues = new ArrayList<>();
                List<LLVMBasicBlockRef> forwardBlocks = new ArrayList<>();
                for (Block predecessor : block.getPredecessors()) {
                    if (processedBlocks.contains(predecessor)) {
                        forwardPredValues.add(block.isExceptionEntry() ? gen.getHandlerSpecialRegisterValue(reg, predecessor) : gen.getSpecialRegisterValue(reg, predecessor));
                        forwardBlocks.add(gen.getBlockEnd(predecessor));
                    }
                }
                LLVMValueRef registerPhi = builder.buildPhi(builder.wordType(), forwardPredValues.toArray(new LLVMValueRef[0]), forwardBlocks.toArray(new LLVMBasicBlockRef[0]));
                gen.setInitialSpecialRegisterValue(reg, registerPhi);
            }
            for (ValuePhiNode phiNode : merge.valuePhis()) {
                List<LLVMValueRef> forwardPhis = new ArrayList<>();
                List<LLVMBasicBlockRef> forwardBlocks = new ArrayList<>();
                LLVMTypeRef phiType = getLLVMType(phiNode);
                boolean hasBackwardIncomingEdges = false;
                for (Block predecessor : block.getPredecessors()) {
                    if (processedBlocks.contains(predecessor)) {
                        ValueNode phiValue = phiNode.valueAt((AbstractEndNode) predecessor.getEndNode());
                        LLVMValueRef value;
                        if (operand(phiValue) instanceof LLVMPendingSpecialRegisterRead) {
                            /*
                                 * The pending read may need to perform instructions to load the
                                 * value, so we put them at the end of the predecessor block
                                 */
                            Block currentBlock = (Block) gen.getCurrentBlock();
                            gen.editBlock(predecessor);
                            value = llvmOperand(phiValue);
                            gen.resumeBlock(currentBlock);
                        } else {
                            value = llvmOperand(phiValue);
                        }
                        LLVMBasicBlockRef parentBlock = gen.getBlockEnd(predecessor);
                        forwardPhis.add(value);
                        forwardBlocks.add(parentBlock);
                    } else {
                        hasBackwardIncomingEdges = true;
                    }
                }
                LLVMValueRef[] incomingValues = forwardPhis.toArray(new LLVMValueRef[0]);
                LLVMBasicBlockRef[] incomingBlocks = forwardBlocks.toArray(new LLVMBasicBlockRef[0]);
                LLVMValueRef phi = builder.buildPhi(phiType, incomingValues, incomingBlocks);
                if (hasBackwardIncomingEdges) {
                    backwardsPhi.put(phiNode, phi);
                }
                setResult(phiNode, phi);
            }
        } else {
            assert block.getPredecessorCount() == 1;
            Block predecessor = block.getFirstPredecessor();
            for (SpecialRegister reg : SpecialRegister.registers()) {
                gen.setInitialSpecialRegisterValue(reg, block.isExceptionEntry() ? gen.getHandlerSpecialRegisterValue(reg, predecessor) : gen.getSpecialRegisterValue(reg, predecessor));
            }
        }
    }
    gen.getDebugInfoPrinter().printBlock(block);
    for (Node node : blockMap.get(block)) {
        if (node instanceof ValueNode) {
            /*
                 * There can be cases in which the result of an instruction is already set before by
                 * other instructions.
                 */
            if (!valueMap.containsKey(node)) {
                ValueNode valueNode = (ValueNode) node;
                try {
                    gen.getDebugInfoPrinter().printNode(valueNode);
                    emitNode(valueNode);
                } catch (GraalError e) {
                    throw GraalGraphError.transformAndAddContext(e, valueNode);
                } catch (Throwable e) {
                    throw new GraalGraphError(e).addContext(valueNode);
                }
            }
        }
    }
    if (builder.blockTerminator(gen.getBlockEnd(block)) == null) {
        NodeIterable<Node> successors = block.getEndNode().successors();
        assert successors.count() == block.getSuccessorCount();
        if (block.getSuccessorCount() != 1) {
            /*
                 * If we have more than one successor, we cannot just use the first one. Since
                 * successors are unordered, this would be a random choice.
                 */
            throw new GraalError("Block without BlockEndOp: " + block.getEndNode());
        }
        builder.buildBranch(gen.getBlock(block.getFirstSuccessor()));
    }
    processedBlocks.add(block);
}

Example 2 with LLVMPendingSpecialRegisterRead

use of com.oracle.svm.core.graal.llvm.util.LLVMUtils.LLVMPendingSpecialRegisterRead in project graal by oracle.

the class NodeLLVMBuilder method setResult.

@Override
public Value setResult(ValueNode node, Value operand) {
    LLVMValueWrapper llvmOperand;
    boolean typeOverride = false;
    if (operand instanceof LLVMValueWrapper) {
        llvmOperand = (LLVMValueWrapper) operand;
    } else if (operand instanceof ConstantValue) {
        /* This only happens when emitting null or illegal object constants */
        PlatformKind kind = operand.getPlatformKind();
        if (kind instanceof LLVMKind) {
            llvmOperand = new LLVMVariable(builder.constantNull(((LLVMKind) kind).get()));
        } else {
            assert kind == ValueKind.Illegal.getPlatformKind();
            llvmOperand = new LLVMVariable(builder.getUndef());
        }
    } else if (operand instanceof LLVMAddressValue) {
        LLVMAddressValue addressValue = (LLVMAddressValue) operand;
        Value wrappedBase = addressValue.getBase();
        Value index = addressValue.getIndex();
        if (wrappedBase instanceof LLVMPendingSpecialRegisterRead) {
            LLVMPendingSpecialRegisterRead pendingRead = (LLVMPendingSpecialRegisterRead) wrappedBase;
            if (index != null && index != Value.ILLEGAL) {
                pendingRead = new LLVMPendingSpecialRegisterRead(pendingRead, LLVMUtils.getVal(addressValue.getIndex()));
            }
            llvmOperand = pendingRead;
        } else {
            LLVMValueRef base = LLVMUtils.getVal(wrappedBase);
            LLVMTypeRef baseType = LLVMIRBuilder.typeOf(base);
            if (LLVMIRBuilder.isWordType(baseType)) {
                base = builder.buildIntToPtr(base, builder.rawPointerType());
            } else if (LLVMIRBuilder.isObjectType(baseType)) {
                typeOverride = true;
            } else {
                throw shouldNotReachHere(LLVMUtils.dumpValues("unsupported base for address", base));
            }
            LLVMValueRef intermediate;
            if (index == null || index == Value.ILLEGAL) {
                intermediate = base;
            } else {
                intermediate = builder.buildGEP(base, LLVMUtils.getVal(index));
            }
            llvmOperand = new LLVMVariable(intermediate);
        }
    } else if (operand instanceof RegisterValue) {
        RegisterValue registerValue = (RegisterValue) operand;
        llvmOperand = (LLVMValueWrapper) gen.emitReadRegister(registerValue.getRegister(), registerValue.getValueKind());
    } else {
        throw shouldNotReachHere("unknown operand: " + operand.toString());
    }
    assert typeOverride || LLVMIRBuilder.compatibleTypes(getLLVMType(node), LLVMIRBuilder.typeOf(llvmOperand.get())) : LLVMUtils.dumpValues("value type doesn't match node stamp (" + node.stamp(NodeView.DEFAULT).toString() + ")", llvmOperand.get());
    gen.getDebugInfoPrinter().setValueName(llvmOperand, node);
    valueMap.put(node, llvmOperand);
    return operand;
}