Preliminary lowering of typed array loads in TF.

test/cctest/compiler/test-run-properties.cc

+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "src/v8.h"
+
+#include "test/cctest/compiler/function-tester.h"
+
+using namespace v8::internal;
+using namespace v8::internal::compiler;
+
+template <typename U>
+static void TypedArrayLoadHelper(const char* array_type) {
+  const int64_t values[] = {
+      0x00000000, 0x00000001, 0x00000023, 0x00000042, 0x12345678, 0x87654321,
+      0x0000003f, 0x0000007f, 0x00003fff, 0x00007fff, 0x3fffffff, 0x7fffffff,
+      0x000000ff, 0x00000080, 0x0000ffff, 0x00008000, 0xffffffff, 0x80000000,
+  };
+  size_t size = arraysize(values);
+  EmbeddedVector<char, 1024> values_buffer;
+  StringBuilder values_builder(values_buffer.start(), values_buffer.length());
+  for (unsigned i = 0; i < size; i++) {
+    values_builder.AddFormatted("a[%d] = 0x%08x;", i, values[i]);
+  }
+
+  // Note that below source creates two different typed arrays with distinct
+  // elements kind to get coverage for both access patterns:
+  // - IsFixedTypedArrayElementsKind(x)
+  // - IsExternalArrayElementsKind(y)
+  const char* source =
+      "(function(a) {"
+      "  var x = (a = new %1$sArray(%2$d)); %3$s;"
+      "  var y = (a = new %1$sArray(%2$d)); %3$s; %%TypedArrayGetBuffer(y);"
+      "  if (!%%HasFixed%1$sElements(x)) %%AbortJS('x');"
+      "  if (!%%HasExternal%1$sElements(y)) %%AbortJS('y');"
+      "  function f(a,b) {"
+      "    a = a | 0; b = b | 0;"
+      "    return x[a] + y[b];"
+      "  }"
+      "  return f;"
+      "})()";
+  EmbeddedVector<char, 1024> source_buffer;
+  SNPrintF(source_buffer, source, array_type, size, values_buffer.start());
+
+  FunctionTester T(
+      source_buffer.start(),
+      CompilationInfo::kContextSpecializing | CompilationInfo::kTypingEnabled);
+  for (unsigned i = 0; i < size; i++) {
+    for (unsigned j = 0; j < size; j++) {
+      double value_a = static_cast<U>(values[i]);
+      double value_b = static_cast<U>(values[j]);
+      double expected = value_a + value_b;
+      T.CheckCall(T.Val(expected), T.Val(i), T.Val(j));
+    }
+  }
+}
+
+
+TEST(TypedArrayLoad) {
+  FLAG_typed_array_max_size_in_heap = 256;
+  TypedArrayLoadHelper<int8_t>("Int8");
+  TypedArrayLoadHelper<uint8_t>("Uint8");
+  TypedArrayLoadHelper<int16_t>("Int16");
+  TypedArrayLoadHelper<uint16_t>("Uint16");
+  TypedArrayLoadHelper<int32_t>("Int32");
+  TypedArrayLoadHelper<uint32_t>("Uint32");
+  TypedArrayLoadHelper<double>("Float64");
+  // TODO(mstarzinger): Add tests for Float32.
+  // TODO(mstarzinger): Add tests for ClampedUint8.
+}