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Rafael Espindola 39751afc4e Misc improvements to StringTableBuilder. 
This patch adds write methods to StringTableBuilder so that it is
easier to change the underlying implementation.

Using the write methods, avoid creating a temporary buffer when using
mmaped output.

It also uses a more compact key in the DenseMap. Overall this produces
a slightly faster lld:

firefox
  master 6.853419709
  patch  6.841968912 1.00167361138x faster
chromium
  master 4.297280174
  patch  4.298712163 1.00033323147x slower
chromium fast
  master 1.802335952
  patch  1.806872459 1.00251701521x slower
the gold plugin
  master 0.3247149
  patch  0.321971644 1.00852017888x faster
clang
  master 0.551279945
  patch  0.543733194 1.01387951128x faster
llvm-as
  master 0.032743458
  patch  0.032143478 1.01866568391x faster
the gold plugin fsds
  master 0.350814247
  patch  0.348571741 1.00643341309x faster
clang fsds
  master 0.6281672
  patch  0.621130222 1.01132931187x faster
llvm-as fsds
  master 0.030168899
  patch  0.029797155 1.01247582194x faster
scylla
  master 3.104222518
  patch  3.059590248 1.01458766252x faster

llvm-svn: 283266
 		2016-10-04 22:43:25 +00:00
clang Separate builtins for x84-64 and i386; implement __mulh and __umulh 2016-10-04 22:29:49 +00:00
clang-tools-extra Make building the clang-tidy VS extension less spammy. 2016-10-04 21:27:09 +00:00
compiler-rt [asan] Switch to using dynamic shadow offset on iOS 2016-10-04 19:02:53 +00:00
debuginfo-tests New round of fixes for "Always compile debuginfo-tests for the host triple" 2014-10-18 23:47:59 +00:00
libclc Provide vstore_half helper to workaround clc restrictions 2016-09-21 20:15:55 +00:00
libcxx [libcxx] [test] Guard __has_include usage with a macro 2016-10-04 21:25:51 +00:00
libcxxabi [CMake] Fix libc++abi standalone cmake build. 2016-10-03 11:08:17 +00:00
libunwind libunwind: Add OpenBSD case for _Unwind_Ptr typedef 2016-09-28 15:37:21 +00:00
lld Add a comment. 2016-10-04 16:47:49 +00:00
lldb xfailing tests for Minidump plugin 2016-10-04 21:55:47 +00:00
llgo [llgo] add llgo source path to LLVM_GO_PACKAGES 2016-07-27 03:01:00 +00:00
llvm Misc improvements to StringTableBuilder. 2016-10-04 22:43:25 +00:00
openmp [cmake] Fix for a bug https://llvm.org/bugs/show_bug.cgi?id=30489 "Cannot build with -DLIBOMP_FORTRAN_MODULES=True" 2016-09-30 22:05:45 +00:00
parallel-libs [SE] Change CoreTests target name 2016-09-27 15:32:52 +00:00
polly Build and run isl_test as part of check-polly 2016-10-04 19:48:40 +00:00