UserAgent: Mozilla/5.0 (X11; Linux mips64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3096.2 Safari/537.36

Steps to reproduce the problem:
update chromium latest version from https://chromium.googlesource.com/chromium/src.git,and compiled with _default_allocator=tcmalloc on loongson3a platform，but occurs following errors：
FAILED: g++ -MMD -MF obj/base/allocator/tcmalloc/internal_logging.o.d -DNO_HEAP_CHECK -DV8_DEPRECATION_WARNINGS -DUSE_UDEV -DUSE_AURA=1 -DUSE_PANGO=1 -DUSE_CAIRO=1 -DUSE_GLIB=1 -DUSE_NSS_CERTS=1 -DUSE_X11=1 -DDISABLE_NACL -DFULL_SAFE_BROWSING -DSAFE_BROWSING_CSD -DSAFE_BROWSING_DB_LOCAL -DCHROMIUM_BUILD -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -DNDEBUG -DNVALGRIND -DDYNAMIC_ANNOTATIONS_ENABLED=0 -DTCMALLOC_DONT_REPLACE_SYSTEM_ALLOC -I../../base/allocator -I../../third_party/tcmalloc/chromium/src/base -I../../third_party/tcmalloc/chromium/src -I../.. -Igen -fno-strict-aliasing --param=ssp-buffer-size=4 -fstack-protector -Wno-builtin-macro-redefined -D__DATE__= -D__TIME__= -D__TIMESTAMP__= -funwind-tables -fPIC -pipe -march=loongson3a -Wa,-march=loongson3a -pthread -fomit-frame-pointer -g0 -fvisibility=hidden -Wno-unused-local-typedefs -Wno-maybe-uninitialized -Wno-missing-field-initializers -Wno-unused-parameter -Wno-sign-compare -Wno-unused-result -O2 -fno-ident -fdata-sections -ffunction-sections -std=gnu++11 -fno-rtti -fno-exceptions -fvisibility-inlines-hidden -fpermissive -Wno-deprecated -Wno-narrowing -c ../../third_party/tcmalloc/chromium/src/internal_logging.cc -o obj/base/allocator/tcmalloc/internal_logging.o
In file included from ../../third_party/tcmalloc/chromium/src/base/atomicops.h:109:0,
                 from ../../third_party/tcmalloc/chromium/src/base/spinlock.h:47,
                 from ../../third_party/tcmalloc/chromium/src/internal_logging.cc:46:
../../third_party/tcmalloc/chromium/src/base/atomicops-internals-x86.h: 在函数‘void tcmalloc::Log(tcmalloc::LogMode, const char*, int, tcmalloc::LogItem, tcmalloc::LogItem, tcmalloc::LogItem, tcmalloc::LogItem)’中:
../../third_party/tcmalloc/chromium/src/base/atomicops-internals-x86.h:79:35: 错误：‘asm’中不可能的约束
                        : "memory");
                                   ^
{standard input}: Assembler messages:
{standard input}:494: Error: unrecognized opcode `lfence'

What is the expected behavior?
build successfully on loongson3a, and test passed all.

What went wrong?
Not support mipsel/mips64el architecture

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Does this work in other browsers? N/A

Chrome version: 60.0.3096.2  Channel: n/a
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