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Roman Lebedev 2927716277 [CVP] Deduce no-wrap on `mul` 
Summary:
`ConstantRange::makeGuaranteedNoWrapRegion()` knows how to deal with `mul`
since rL335646, there is exhaustive test coverage.
This is already used by CVP's `processOverflowIntrinsic()`,
and by SCEV's `StrengthenNoWrapFlags()`

That being said, currently, this doesn't help much in the end:
| statistic                              |     old |     new | delta | percentage |
| correlated-value-propagation.NumMulNSW |       4 |     275 |   271 |   6775.00% |
| correlated-value-propagation.NumMulNUW |       4 |    1323 |  1319 |  32975.00% |
| correlated-value-propagation.NumMulNW  |       8 |    1598 |  1590 |  19875.00% |
| correlated-value-propagation.NumNSW    |    5715 |    5986 |   271 |      4.74% |
| correlated-value-propagation.NumNUW    |    9193 |   10512 |  1319 |     14.35% |
| correlated-value-propagation.NumNW     |   14908 |   16498 |  1590 |     10.67% |
| instcount.NumAddInst                   |  275871 |  275869 |    -2 |      0.00% |
| instcount.NumBrInst                    |  708234 |  708232 |    -2 |      0.00% |
| instcount.NumMulInst                   |   43812 |   43810 |    -2 |      0.00% |
| instcount.NumPHIInst                   |  316786 |  316784 |    -2 |      0.00% |
| instcount.NumTruncInst                 |   62165 |   62167 |     2 |      0.00% |
| instcount.NumUDivInst                  |    2528 |    2526 |    -2 |     -0.08% |
| instcount.TotalBlocks                  |  842995 |  842993 |    -2 |      0.00% |
| instcount.TotalInsts                   | 7376486 | 7376478 |    -8 |      0.00% |
(^ test-suite plain, tests still pass)

Reviewers: nikic, reames, luqmana, sanjoy, timshen

Reviewed By: reames

Subscribers: hiraditya, javed.absar, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D69203

llvm-svn: 375396
 		2019-10-21 08:21:44 +00:00
clang [AMDGPU] Fix assertion due to initializer list 2019-10-20 15:02:22 +00:00
clang-tools-extra Move endian constant from Host.h to SwapByteOrder.h, prune include 2019-10-19 00:48:11 +00:00
compiler-rt [profile] Use -fPIC -shared in a test instead of -dynamiclib 2019-10-19 00:51:27 +00:00
debuginfo-tests Make nrvo-string test more robust. 2019-06-27 20:38:37 +00:00
libc [libc] Do not add unittests if LLVM_INCLUDE_TESTS is OFF. 2019-10-15 17:42:28 +00:00
libclc travis: Add LLVM 9 build 2019-09-27 05:58:15 +00:00
libcxx Refine check for `_LIBCPP_C_HAS_NO_GETS` on FreeBSD 2019-10-19 10:59:23 +00:00
libcxxabi P1152R4: Fix deprecation warnings in libc++ testsuite and in uses of is_invocable that would internally conjure up a deprecated function type. 2019-10-19 00:06:00 +00:00
libunwind [libunwind][Android] Fix findUnwindSections for ARM EHABI Bionic 2019-10-18 19:59:22 +00:00
lld [LLD] [COFF] Use the local dwarf code instead of Symbolizer for resolving code locations. NFC. 2019-10-21 08:01:59 +00:00
lldb [LLDB] [Windows] Initial support for ARM register contexts 2019-10-21 08:02:34 +00:00
llgo IR: Support parsing numeric block ids, and emit them in textual output. 2019-03-22 18:27:13 +00:00
llvm [CVP] Deduce no-wrap on `mul` 2019-10-21 08:21:44 +00:00
openmp [libomptarget][nfc] Make interface.h target independent 2019-10-15 17:15:26 +00:00
parallel-libs Fix typos throughout the license files that somehow I and my reviewers 2019-01-21 09:52:34 +00:00
polly [ScopBuilder] Fix bug 38358 by preserving correct order of ScopStmts. 2019-10-17 23:55:35 +00:00
pstl [pstl] Allow customizing whether per-TU insulation is provided 2019-08-13 12:49:00 +00:00
.arcconfig Update monorepo .arcconfig with new project callsign. 2019-01-31 14:34:59 +00:00
.clang-format Add .clang-tidy and .clang-format files to the toplevel of the 2019-01-29 16:43:16 +00:00
.clang-tidy Disable tidy checks with too many hits 2019-02-01 11:20:13 +00:00
.git-blame-ignore-revs Add LLDB reformatting to .git-blame-ignore-revs 2019-09-04 09:31:55 +00:00
.gitignore Add a newline at the end of the file 2019-09-04 06:33:46 +00:00
README.md
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README.md

The LLVM Compiler Infrastructure

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