James Molloy b2e436de42 [SimplifyCFG] Range reduce switches ... If a switch is sparse and all the cases (once sorted) are in arithmetic progression, we can extract the common factor out of the switch and create a dense switch. For example: switch (i) { case 5: ... case 9: ... case 13: ... case 17: ... } can become: if ( (i - 5) % 4 ) goto default; switch ((i - 5) / 4) { case 0: ... case 1: ... case 2: ... case 3: ... } or even better: switch ( ROTR(i - 5, 2) { case 0: ... case 1: ... case 2: ... case 3: ... } The division and remainder operations could be costly so we only do this if the factor is a power of two, and emit a right-rotate instead of a divide/remainder sequence. Dense switches can be lowered significantly better than sparse switches and can even be transformed into lookup tables. llvm-svn: 277325		2016-08-01 07:45:11 +00:00
clang	Add more gcc compatibility names to clang's cpuid.h	2016-07-31 20:23:23 +00:00
clang-tools-extra	[clang-tidy] add check cppcoreguidelines-special-member-functions	2016-07-30 08:58:54 +00:00
compiler-rt	[asan] Reduce flakiness of heavy recovery mode tests.	2016-08-01 07:24:36 +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	Make min follow the OCL 1.0 specs	2016-07-25 22:36:22 +00:00
libcxx	Add a bunch of noexcepts to char_traits and string_view.	2016-07-28 04:52:02 +00:00
libcxxabi	Attempt to bring peace to -Werror buildbots.	2016-07-19 20:35:09 +00:00
libunwind	libunwind: correct return code in unwinding trace log message	2016-07-29 21:24:19 +00:00
lld	Remove dead ctor.	2016-07-30 00:13:30 +00:00
lldb	Some code that is sanity checking stepping out back out from one inlined	2016-07-29 18:09:12 +00:00
llgo	[llgo] add llgo source path to LLVM_GO_PACKAGES	2016-07-27 03:01:00 +00:00
llvm	[SimplifyCFG] Range reduce switches	2016-08-01 07:45:11 +00:00
openmp	Make balanced affinity work on AArch64.	2016-07-29 20:55:03 +00:00
parallel-libs	[StreamExecutor] Add error handling library	2016-07-29 20:45:52 +00:00
polly	Add missing prefixes.	2016-07-30 11:15:00 +00:00