1 /* 2 * Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 import org.testng.annotations.Test; 24 25 import java.lang.reflect.code.Block; 26 import java.lang.reflect.code.Value; 27 import java.lang.reflect.code.bytecode.SlotOp; 28 import java.lang.reflect.code.bytecode.SlotSSA; 29 import java.lang.reflect.code.op.CoreOp; 30 import java.lang.reflect.code.type.FunctionType; 31 import java.lang.reflect.code.type.JavaType; 32 import java.lang.reflect.code.type.MethodRef; 33 34 /* 35 * @test 36 * @run testng TestSlots 37 */ 38 public class TestSlotOps { 39 40 static void m(int i) { 41 42 } 43 44 @Test 45 public void test() { 46 CoreOp.FuncOp f = build(); 47 System.out.println(f.toText()); 48 49 CoreOp.FuncOp fssa = SlotSSA.transform(f); 50 System.out.println(fssa.toText()); 51 } 52 53 static CoreOp.FuncOp build() { 54 return CoreOp.func("f", FunctionType.functionType(JavaType.J_L_STRING)).body(b -> { 55 Block.Builder trueBlock = b.block(); 56 Block.Builder falseBlock = b.block(); 57 Block.Builder exitBlock = b.block(); 58 59 // Entry block 60 { 61 Value nullConstant = b.op(CoreOp.constant(JavaType.J_L_OBJECT, null)); 62 b.op(SlotOp.store(0, nullConstant)); 63 64 b.op(CoreOp.conditionalBranch(b.op(CoreOp.constant(JavaType.BOOLEAN, true)), 65 trueBlock.successor(), falseBlock.successor())); 66 } 67 68 // True block 69 { 70 Value oneConstant = trueBlock.op(CoreOp.constant(JavaType.INT, 1)); 71 trueBlock.op(SlotOp.store(0, oneConstant)); 72 73 Value loadValue = trueBlock.op(SlotOp.load(0, JavaType.INT)); 74 trueBlock.op(CoreOp.invoke(MethodRef.method(TestSlots.class, "m", void.class, int.class), loadValue)); 75 76 Value stringConstant = trueBlock.op(CoreOp.constant(JavaType.J_L_STRING, "TRUE")); 77 trueBlock.op(SlotOp.store(0, stringConstant)); 78 79 trueBlock.op(CoreOp.branch(exitBlock.successor())); 80 } 81 82 // False block 83 { 84 Value stringConstant = falseBlock.op(CoreOp.constant(JavaType.J_L_STRING, "FALSE")); 85 falseBlock.op(SlotOp.store(0, stringConstant)); 86 87 falseBlock.op(CoreOp.branch(exitBlock.successor())); 88 } 89 90 // Exit block 91 { 92 Value loadValue = exitBlock.op(SlotOp.load(0, JavaType.J_L_STRING)); 93 exitBlock.op(CoreOp._return(loadValue)); 94 } 95 }); 96 } 97 }