undefect. CWE-407 — 63 sites patched across 27 ecosystems

Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
2026-03-26 17:11:57 -04:00 · 2026-03-26 17:11:57 -04:00 · 0a580b313d
commit 0a580b313d
70422 changed files with 17213626 additions and 0 deletions
--- a/test/hotspot/jtreg/compiler/vectorapi/TestVectorLoadStoreOptimization.java
+++ b/test/hotspot/jtreg/compiler/vectorapi/TestVectorLoadStoreOptimization.java
@ -0,0 +1,113 @@
+/*
+ * Copyright (c) 2025, 2026, NVIDIA CORPORATION & 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 compiler.vectorapi;
+
+import compiler.lib.generators.*;
+import compiler.lib.ir_framework.*;
+import jdk.incubator.vector.*;
+import jdk.test.lib.Asserts;
+
+/**
+ * @test 8371603 8378239
+ * @key randomness
+ * @library /test/lib /
+ * @summary Test the missing optimization issues for vector load/store caused by JDK-8286941
+ * @modules jdk.incubator.vector
+ *
+ * @run driver ${test.main.class}
+ */
+public class TestVectorLoadStoreOptimization {
+    private static final int LENGTH = 1024;
+    private static final Generators random = Generators.G;
+
+    private static final VectorSpecies<Integer> SPECIES = IntVector.SPECIES_PREFERRED;
+
+    private static int[] a;
+
+    static {
+        a = new int[LENGTH];
+        random.fill(random.ints(), a);
+    }
+
+    // Test that "LoadVectorNode::Ideal()" calls "LoadNode::Ideal()" as expected,
+    // which sees the previous stores that go to the same position in-dependently,
+    // and optimize out the load with matched store values.
+    @Test
+    @IR(counts = { IRNode.LOAD_VECTOR_I, "1" },
+        applyIfCPUFeatureOr = {"asimd", "true", "avx", "true", "rvv", "true"})
+    public static void testLoadVector() {
+        IntVector v1 = IntVector.fromArray(SPECIES, a, 0);
+        v1.intoArray(a, SPECIES.length());
+        v1.intoArray(a, 2 * SPECIES.length());
+        // The second load vector equals to the first one and should be optimized
+        // out by "LoadNode::Ideal()".
+        IntVector v2 = IntVector.fromArray(SPECIES, a, SPECIES.length());
+        v2.intoArray(a, 3 * SPECIES.length());
+    }
+
+    @Check(test = "testLoadVector")
+    public static void testLoadVectorVerify() {
+        for (int i = SPECIES.length(); i < 4 * SPECIES.length(); i += SPECIES.length()) {
+            for (int j = 0; j < SPECIES.length(); j++) {
+                Asserts.assertEquals(a[i + j], a[j]);
+            }
+        }
+    }
+
+    // Test that "StoreVectorNode::Ideal()" calls "StoreNode::Ideal()" as expected,
+    // which can get rid of previous stores that go to the same position.
+    @Test
+    @IR(counts = { IRNode.STORE_VECTOR, "1" },
+        applyIfCPUFeatureOr = {"asimd", "true", "avx", "true", "rvv", "true"})
+    public static void testStoreVector() {
+        IntVector v1 = IntVector.fromArray(SPECIES, a, 0 * SPECIES.length());
+        IntVector v2 = IntVector.fromArray(SPECIES, a, 1 * SPECIES.length());
+        // Useless store to same position as below, which should be optimized out by
+        // "StoreNode::Ideal()".
+        v1.intoArray(a, 3 * SPECIES.length());
+        v2.intoArray(a, 3 * SPECIES.length());
+    }
+
+    @Check(test = "testStoreVector")
+    public static void testStoreVectorVerify() {
+        for (int i = 3 * SPECIES.length(); i < 4 * SPECIES.length(); i++) {
+            Asserts.assertEquals(a[i], a[i - 2 * SPECIES.length()]);
+        }
+    }
+
+    // Test that store a value that is just loaded from the same memory location is elided
+    @Test
+    @IR(failOn = IRNode.STORE_VECTOR,
+        applyIfCPUFeatureOr = {"asimd", "true", "avx", "true", "rvv", "true"})
+    public static void testStoreVector2() {
+        IntVector.fromArray(SPECIES, a, 0).intoArray(a, 0);
+    }
+
+    public static void main(String[] args) {
+        TestFramework testFramework = new TestFramework();
+        testFramework.setDefaultWarmup(10000)
+                     .addFlags("--add-modules=jdk.incubator.vector")
+                     .start();
+    }
+}