Mercurial > hg > graal-compiler
view graal/com.oracle.graal.compiler.sparc/src/com/oracle/graal/compiler/sparc/SPARCSubIntCompareCanonicalizationPhase.java @ 22935:29114298229f
SPARC-specific canonicalization of sub-int compare
author | Stefan Anzinger <stefan.anzinger@oracle.com> |
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date | Tue, 03 Nov 2015 18:14:26 +0100 |
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/* * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.oracle.graal.compiler.sparc; import jdk.vm.ci.code.CodeUtil; import jdk.vm.ci.common.JVMCIError; import jdk.vm.ci.meta.JavaConstant; import com.oracle.graal.compiler.common.type.IntegerStamp; import com.oracle.graal.compiler.common.type.Stamp; import com.oracle.graal.graph.Node; import com.oracle.graal.nodes.ConstantNode; import com.oracle.graal.nodes.StructuredGraph; import com.oracle.graal.nodes.ValueNode; import com.oracle.graal.nodes.calc.CompareNode; import com.oracle.graal.nodes.calc.SignExtendNode; import com.oracle.graal.phases.Phase; public class SPARCSubIntCompareCanonicalizationPhase extends Phase { public SPARCSubIntCompareCanonicalizationPhase() { } @Override protected void run(StructuredGraph graph) { for (Node n : graph.getNodes()) { if (n instanceof CompareNode) { CompareNode enode = (CompareNode) n; min32(enode, enode.getX()); min32(enode, enode.getY()); } } } private static void min32(CompareNode enode, ValueNode v) { Stamp s = v.stamp(); if (s instanceof IntegerStamp) { int bits = ((IntegerStamp) s).getBits(); if (bits != 32 && bits != 64) { if (bits <= 32) { bits = 32; } else { bits = 64; } ValueNode replacement; if (v instanceof ConstantNode) { JavaConstant newConst; if (bits == 32) { newConst = JavaConstant.forInt(v.asJavaConstant().asInt()); } else if (bits == 64) { newConst = JavaConstant.forLong(v.asJavaConstant().asLong()); } else { throw JVMCIError.shouldNotReachHere(); } long mask = CodeUtil.mask(bits); replacement = v.graph().addOrUnique(new ConstantNode(newConst, IntegerStamp.stampForMask(bits, newConst.asLong() & mask, newConst.asLong() & mask))); } else { replacement = v.graph().addOrUnique(new SignExtendNode(v, bits)); } v.replaceAtUsages(replacement, x -> x == enode); } } } }