[turbofan] Fix shift_left/right in unittest

test/unittests/compiler/typer-unittest.cc

 // Copyright 2015 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 <functional>
 
 #include "src/codegen.h"
 #include "src/compiler/js-operator.h"
 #include "src/compiler/node-properties.h"
 #include "src/compiler/operator-properties.h"
@@ skipping 205 matching lines @@
       Type* subtype2 = RandomSubtype(type2);
       Type* subtype = TypeBinaryOp(op, subtype1, subtype2);
       EXPECT_TRUE(subtype->Is(type));
     }
   }
 };
 
 
 namespace {
 
-int32_t shift_left(int32_t x, int32_t y) { return x << y; }
-int32_t shift_right(int32_t x, int32_t y) { return x >> y; }
+int32_t shift_left(int32_t x, int32_t y) { return x << (y & 0x1f); }
+int32_t shift_right(int32_t x, int32_t y) { return x >> (y & 0x1f); }
 int32_t bit_or(int32_t x, int32_t y) { return x | y; }
 int32_t bit_and(int32_t x, int32_t y) { return x & y; }
 int32_t bit_xor(int32_t x, int32_t y) { return x ^ y; }
 
 }  // namespace
 
 
 //------------------------------------------------------------------------------
 // Soundness
 //   For simplicity, we currently only test soundness on expression operators
@@ skipping 131 matching lines @@
 TEST_BINARY_MONOTONICITY(Add)
 TEST_BINARY_MONOTONICITY(Subtract)
 TEST_BINARY_MONOTONICITY(Multiply)
 TEST_BINARY_MONOTONICITY(Divide)
 TEST_BINARY_MONOTONICITY(Modulus)
 #undef TEST_BINARY_MONOTONICITY
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8