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Serguei Katkov 6c6b40b330 [SCEV] Reduce the number of invocation to non trivial getExact function 
The invocation of getExact in ScalarEvolution::getBackedgeTakenInfo is used
only for getting statistic and for assert. 
Even if statistics is disabled, the code related to it will be eliminated
the invocation to getExact itself will not be eliminated
because it may have side-effects like creation of new SCEVs.

So do invocation only when we collect statistics or executes asserts.

Reviewers: mkazantsev, sanjoy, javed.absar
Reviewed By: javed.absar
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D46178

llvm-svn: 331099
 		2018-04-28 03:53:36 +00:00
clang [ItaniumMangle] Undeduced auto type shouldn't be substitutable. 2018-04-28 02:40:28 +00:00
clang-tools-extra [clangd] Fix unicode handling, using UTF-16 where LSP requires it. 2018-04-27 11:59:28 +00:00
compiler-rt tsan: improve "destroy of a locked mutex" reports 2018-04-27 08:59:35 +00:00
debuginfo-tests [Darwin] Specify DWARF 2/4 when running apple accelerator tests. 2018-02-26 20:56:45 +00:00
libclc relational/select: Condition types for half are short/ushort, not char/uchar 2018-04-25 17:36:36 +00:00
libcxx [libcxx] [test] Remove non-portable assertions from filebuf tests 2018-04-26 22:18:33 +00:00
libcxxabi [libc++abi] Replace __sync_* functions with __libcpp_atomic_* functions. 2018-04-16 22:00:14 +00:00
libunwind [cmake] Remove duplicate command line options from build 2018-04-05 20:27:50 +00:00
lld Migrate from std::pointer_to_unary_function as it is removed in C++17 2018-04-28 00:12:02 +00:00
lldb Fix build bots after r331049 broke them. 2018-04-27 21:10:07 +00:00
llgo irgen: Create functions instead of global variables for builtin hash and equal algorithms. 2017-06-04 22:11:28 +00:00
llvm [SCEV] Reduce the number of invocation to non trivial getExact function 2018-04-28 03:53:36 +00:00
openmp [OpenMP] Remove compilation warning when using clang to compile bc files. 2018-04-26 14:06:53 +00:00
parallel-libs [Axccel] Remove -Wno-missing-braces in build 2016-12-19 21:34:07 +00:00
polly [CodeGen] Fix comment. NFC. 2018-04-25 19:54:16 +00:00
README.md Add an svn project to contain the files that appear at the root of the 2017-10-19 21:09:49 +00:00

README.md

Low Level Virtual Machine (LLVM)

This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments.