hotspot/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.lir/src/org/graalvm/compiler/lir/alloc/trace/lsra/TraceLinearScanRegisterAllocationPhase.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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).
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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package org.graalvm.compiler.lir.alloc.trace.lsra;

import org.graalvm.compiler.core.common.alloc.Trace;
import org.graalvm.compiler.debug.Debug;
import org.graalvm.compiler.debug.Indent;
import org.graalvm.compiler.lir.alloc.trace.lsra.TraceLinearScanPhase.TraceLinearScan;
import org.graalvm.compiler.lir.gen.LIRGenerationResult;

import jdk.vm.ci.code.TargetDescription;

final class TraceLinearScanRegisterAllocationPhase extends TraceLinearScanAllocationPhase {

    @Override
    protected void run(TargetDescription target, LIRGenerationResult lirGenRes, Trace trace, TraceLinearScanAllocationContext context) {
        TraceLinearScan allocator = context.allocator;
        allocateRegisters(allocator);
    }

    @SuppressWarnings("try")
    private static void allocateRegisters(TraceLinearScan allocator) {
        try (Indent indent = Debug.logAndIndent("allocate registers")) {
            FixedInterval precoloredIntervals = allocator.createFixedUnhandledList();
            TraceInterval notPrecoloredIntervals = allocator.createUnhandledListByFrom(TraceLinearScanPhase.IS_VARIABLE_INTERVAL);

            // allocate cpu registers
            TraceLinearScanWalker lsw = new TraceLinearScanWalker(allocator, precoloredIntervals, notPrecoloredIntervals);
            lsw.walk();
            lsw.finishAllocation();
        }
    }

}