1 files changed, 123 insertions, 0 deletions
diff --git a/js/src/jsapi-tests/testJitMinimalFunc.h b/js/src/jsapi-tests/testJitMinimalFunc.h
new file mode 100644
index 0000000000..3a7dbd3183
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+++ b/js/src/jsapi-tests/testJitMinimalFunc.h
@@ -0,0 +1,123 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef jsapi_tests_jitTestGVN_h
+#define jsapi_tests_jitTestGVN_h
+
+#include "jit/IonAnalysis.h"
+#include "jit/MIRGenerator.h"
+#include "jit/MIRGraph.h"
+#include "jit/RangeAnalysis.h"
+#include "jit/ValueNumbering.h"
+
+namespace js {
+namespace jit {
+
+struct MinimalAlloc {
+  LifoAlloc lifo;
+  TempAllocator alloc;
+
+  // We are not testing the fallible allocator in these test cases, thus make
+  // the lifo alloc chunk extremely large for our test cases.
+  MinimalAlloc() : lifo(128 * 1024), alloc(&lifo) {
+    if (!alloc.ensureBallast()) {
+      MOZ_CRASH("[OOM] Not enough RAM for the test.");
+    }
+  }
+};
+
+struct MinimalFunc : MinimalAlloc {
+  JitCompileOptions options;
+  CompileInfo info;
+  MIRGraph graph;
+  MIRGenerator mir;
+  uint32_t numParams;
+
+  MinimalFunc()
+      : options(),
+        info(0),
+        graph(&alloc),
+        mir(static_cast<CompileRealm*>(nullptr), options, &alloc, &graph, &info,
+            static_cast<const OptimizationInfo*>(nullptr)),
+        numParams(0) {}
+
+  MBasicBlock* createEntryBlock() {
+    MBasicBlock* block =
+        MBasicBlock::New(graph, info, nullptr, MBasicBlock::NORMAL);
+    graph.addBlock(block);
+    return block;
+  }
+
+  MBasicBlock* createOsrEntryBlock() {
+    MBasicBlock* block =
+        MBasicBlock::New(graph, info, nullptr, MBasicBlock::NORMAL);
+    graph.addBlock(block);
+    graph.setOsrBlock(block);
+    return block;
+  }
+
+  MBasicBlock* createBlock(MBasicBlock* pred) {
+    MBasicBlock* block =
+        MBasicBlock::New(graph, info, pred, MBasicBlock::NORMAL);
+    graph.addBlock(block);
+    return block;
+  }
+
+  MParameter* createParameter() {
+    MParameter* p = MParameter::New(alloc, numParams++);
+    return p;
+  }
+
+  bool runGVN() {
+    if (!SplitCriticalEdges(graph)) {
+      return false;
+    }
+    RenumberBlocks(graph);
+    if (!BuildDominatorTree(graph)) {
+      return false;
+    }
+    if (!BuildPhiReverseMapping(graph)) {
+      return false;
+    }
+    ValueNumberer gvn(&mir, graph);
+    if (!gvn.run(ValueNumberer::DontUpdateAliasAnalysis)) {
+      return false;
+    }
+    return true;
+  }
+
+  bool runRangeAnalysis() {
+    if (!SplitCriticalEdges(graph)) {
+      return false;
+    }
+    RenumberBlocks(graph);
+    if (!BuildDominatorTree(graph)) {
+      return false;
+    }
+    if (!BuildPhiReverseMapping(graph)) {
+      return false;
+    }
+    RangeAnalysis rangeAnalysis(&mir, graph);
+    if (!rangeAnalysis.addBetaNodes()) {
+      return false;
+    }
+    if (!rangeAnalysis.analyze()) {
+      return false;
+    }
+    if (!rangeAnalysis.addRangeAssertions()) {
+      return false;
+    }
+    if (!rangeAnalysis.removeBetaNodes()) {
+      return false;
+    }
+    return true;
+  }
+};
+
+}  // namespace jit
+}  // namespace js
+
+#endif