i422torgb565 is asm for clangcl as well

Merge branch 'master' of https://chromium.googlesource.com/libyuv/libyuv into convertcl

allow lto for llvm but not gcc

R=harryjin@google.com
BUG=libyuv:469

Review URL: https://webrtc-codereview.appspot.com/52769004.

README.chromium

 Name: libyuv
 URL: http://code.google.com/p/libyuv/
-Version: 1469
+Version: 1470
 License: BSD
 License File: LICENSE
 

include/libyuv/row.h

@@ -183,8 +183,9 @@ extern "C" {
 #define VISUALC_HAS_AVX2 1
 #endif  // VisualStudio >= 2012
 
-// The following are available require VS2012.  Port to GCC.
-#if !defined(LIBYUV_DISABLE_X86) && defined(VISUALC_HAS_AVX2)
+// The following are available for Visual C and clangcl 32 bit:
+#if !defined(LIBYUV_DISABLE_X86) && defined(_M_IX86) && \
+    (defined(VISUALC_HAS_AVX2) || defined(CLANG_HAS_AVX2))
 #define HAS_ARGB1555TOARGBROW_AVX2
 #define HAS_ARGB4444TOARGBROW_AVX2
 #define HAS_ARGBTOARGB1555ROW_AVX2

include/libyuv/version.h

@@ -11,6 +11,6 @@
 #ifndef INCLUDE_LIBYUV_VERSION_H_  // NOLINT
 #define INCLUDE_LIBYUV_VERSION_H_
 
-#define LIBYUV_VERSION 1469
+#define LIBYUV_VERSION 1470
 
 #endif  // INCLUDE_LIBYUV_VERSION_H_  NOLINT

source/row_common.cc

@@ -2159,8 +2159,7 @@ void I422ToUYVYRow_C(const uint8* src_y,
 // Maximum temporary width for wrappers to process at a time, in pixels.
 #define MAXTWIDTH 2048
 
-#if !(defined(_MSC_VER) && !defined(__clang__)) && \
-    defined(HAS_I422TORGB565ROW_SSSE3)
+#if !defined(_MSC_VER) && defined(HAS_I422TORGB565ROW_SSSE3)
 // row_win.cc has asm version, but GCC uses 2 step wrapper.
 void I422ToRGB565Row_SSSE3(const uint8* src_y,
                            const uint8* src_u,

source/row_gcc.cc

@@ -17,7 +17,8 @@ extern "C" {
 #endif
 
 // This module is for GCC x86 and x64.
-#if !defined(LIBYUV_DISABLE_X86) && (defined(__x86_64__) || defined(__i386__))
+#if !defined(LIBYUV_DISABLE_X86) && \
+    (defined(__x86_64__) || (defined(__i386__) && !defined(_MSC_VER)))
 
 #if defined(HAS_ARGBTOYROW_SSSE3) || defined(HAS_ARGBGRAYROW_SSSE3)
 

source/row_win.cc

@@ -21,9 +21,9 @@ namespace libyuv {
 extern "C" {
 #endif
 
-// This module is for Visual C.
-#if !defined(LIBYUV_DISABLE_X86) && (defined(_M_IX86) || defined(_M_X64)) && \
-    defined(_MSC_VER) && !defined(__clang__)
+// This module is for Visual C 32/64 bit and clangcl 32 bit
+#if !defined(LIBYUV_DISABLE_X86) && \
+   (defined(_M_IX86) || (defined(_M_X64) && !defined(__clang__)))
 
 struct YuvConstants {
   lvec8 kUVToB;     // 0