Speed up x86-64 validator by inlining heavily called routines. Speeds up

src/trusted/validator/x86/decoder/ncop_exps_inl.c

+/*
+ * Copyright (c) 2011 The Native Client Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/*
+ * ncop_exps_inl.c - Holds inline routines for commonly used (simple)
+ * functions in ncop_exps.h. Used to speed up code. Inlined routines
+ * correspond to the following functions in ncop_exps.h, but with an
+ * 'Inline' suffix:
+ *
+ *    NaClGetExpRegister
+ */
+#ifndef NATIVE_CLIENT_SRC_TRUSTED_VALIDATOR_X86_DECODER_NCOP_EXPS_INL_H_
+#define NATIVE_CLIENT_SRC_TRUSTED_VALIDATOR_X86_DECODER_NCOP_EXPS_INL_H_
+
+#include <assert.h>
+#include "native_client/src/trusted/validator/x86/decoder/ncop_exps.h"
+
+static INLINE NaClOpKind NaClGetExpRegisterInline(NaClExp* node) {
+  assert(node->kind == ExprRegister);
+  return (NaClOpKind) node->value;
+}
+
+#endif  /* NATIVE_CLIENT_SRC_TRUSTED_VALIDATOR_X86_DECODER_NCOP_EXPS_INL_H_ */