use __OPTIMIZE__ macro to determine debug vs release.

Debug builds of x86 gcc/clang can run out of register.
Previously NDEBUG or _DEBUG was used to detect a debug build.
But those macros are not set by gentoo builds.
This CL switches to the compiler predefine __OPTIMIZE__ which is
built into clang and gcc.

BUG=libyuv:602
TEST=untested
R=wangcheng@google.com

Review URL: https://codereview.chromium.org/2451503002 .

README.chromium

 Name: libyuv
 URL: http://code.google.com/p/libyuv/
-Version: 1630
+Version: 1631
 License: BSD
 License File: LICENSE
 

include/libyuv/row.h

@@ -174,8 +174,7 @@ extern "C" {
 
 // The following functions fail on gcc/clang 32 bit with fpic and framepointer.
 // caveat: clangcl uses row_win.cc which works.
-#if defined(NDEBUG) || !(defined(_DEBUG) && defined(__i386__)) || \
-    !defined(__i386__) || defined(_MSC_VER)
+#if defined(__x86_64__) || defined(__OPTIMIZE__) || defined(_MSC_VER)
 // TODO(fbarchard): fix build error on android_full_debug=1
 // https://code.google.com/p/libyuv/issues/detail?id=517
 #define HAS_I422ALPHATOARGBROW_SSSE3
@@ -235,7 +234,7 @@ extern "C" {
 #define HAS_ARGBUNATTENUATEROW_AVX2
 #define HAS_BLENDPLANEROW_AVX2
 
-#if !(defined(_DEBUG) && defined(__i386__))
+#if defined(__x86_64__) || defined(__OPTIMIZE__) || defined(_MSC_VER)
 // TODO(fbarchard): fix build error on android_full_debug=1
 // https://code.google.com/p/libyuv/issues/detail?id=517
 #define HAS_I422ALPHATOARGBROW_AVX2

include/libyuv/version.h

@@ -11,6 +11,6 @@
 #ifndef INCLUDE_LIBYUV_VERSION_H_
 #define INCLUDE_LIBYUV_VERSION_H_
 
-#define LIBYUV_VERSION 1630
+#define LIBYUV_VERSION 1631
 
 #endif  // INCLUDE_LIBYUV_VERSION_H_

source/row_gcc.cc

@@ -1708,7 +1708,7 @@ void OMITFP I422ToRGB24Row_SSSE3(const uint8* y_buf,
     [u_buf]"+r"(u_buf),    // %[u_buf]
     [v_buf]"+r"(v_buf),    // %[v_buf]
     [dst_rgb24]"+r"(dst_rgb24),  // %[dst_rgb24]
-#if defined(__i386__) && defined(__pic__)
+#if defined(__i386__)
     [width]"+m"(width)     // %[width]
 #else
     [width]"+rm"(width)    // %[width]
@@ -1772,7 +1772,7 @@ void OMITFP I422AlphaToARGBRow_SSSE3(const uint8* y_buf,
     [v_buf]"+r"(v_buf),    // %[v_buf]
     [a_buf]"+r"(a_buf),    // %[a_buf]
     [dst_argb]"+r"(dst_argb),  // %[dst_argb]
-#if defined(__i386__) && defined(__pic__)
+#if defined(__i386__)
     [width]"+m"(width)     // %[width]
 #else
     [width]"+rm"(width)    // %[width]
@@ -2152,7 +2152,7 @@ void OMITFP I422AlphaToARGBRow_AVX2(const uint8* y_buf,
     [v_buf]"+r"(v_buf),    // %[v_buf]
     [a_buf]"+r"(a_buf),    // %[a_buf]
     [dst_argb]"+r"(dst_argb),  // %[dst_argb]
-#if defined(__i386__) && defined(__pic__)
+#if defined(__i386__)
     [width]"+m"(width)     // %[width]
 #else
     [width]"+rm"(width)    // %[width]