llvm-project

History

Duncan P. N. Exon Smith d4c667c9af Avoid unnecessary uses of `MDNode::getTemporary`, NFC This is a long-delayed follow-up to `5e5b85098d`. `TempMDNode` includes a bunch of machinery for RAUW, and should only be used when necessary. RAUW wasn't being used in any of these cases... it was just a placeholder for a self-reference. Where the real node was using `MDNode::getDistinct`, just replace the temporary argument with `nullptr`. Where the real node was using `MDNode::get`, the `replaceOperandWith` call was "promoting" the node to a distinct one implicitly due to self-reference detection in `MDNode::handleChangedOperand`. The `TempMDNode` was serving a purpose by delaying uniquing, but it's way simpler to just call `MDNode::getDistinct` in the first place. Note that using a self-reference at all in these places is a hold-over from before `distinct` metadata existed. It was an old trick to create distinct nodes. It would be intrusive to change, including bitcode upgrades, etc., and it's harmless so I'm not sure there's much value in removing it from existing schemas. After this commit it still has a tiny memory cost (in the extra metadata operand) but no more overhead in construction. Differential Revision: https://reviews.llvm.org/D90079		2020-10-26 17:03:25 -04:00
..
cmake	[Windows][Polly] Disable LLVMPolly module for all compilers on Windows	2020-09-15 09:12:38 +03:00
docs	Bump the trunk major version to 12	2020-07-15 12:05:05 +02:00
include/polly	Get the address space within getVectorPtrTy	2020-10-20 14:42:10 -07:00
lib	Avoid unnecessary uses of `MDNode::getTemporary`, NFC	2020-10-26 17:03:25 -04:00
test	[Polly] Reuse multiple uses in operand tree.	2020-10-20 18:05:35 -05:00
tools	Fix typos throughout the license files that somehow I and my reviewers	2019-01-21 09:52:34 +00:00
unittests	[Polly] Support linking ScopPassManager against LLVM dylib	2020-08-07 06:46:35 +02:00
utils	Harmonize Python shebang	2020-07-16 21:53:45 +02:00
www	[BasicAA] Replace -basicaa with -basic-aa in polly	2020-06-30 15:50:17 -07:00
.arclint	…
.gitattributes	…
.gitignore	…
CMakeLists.txt	Remove .svn from exclude list as we moved to git	2020-10-21 16:09:21 +02:00
CREDITS.txt	…
LICENSE.txt	Fix typos throughout the license files that somehow I and my reviewers	2019-01-21 09:52:34 +00:00
README	…

README

Polly - Polyhedral optimizations for LLVM
-----------------------------------------
http://polly.llvm.org/

Polly uses a mathematical representation, the polyhedral model, to represent and
transform loops and other control flow structures. Using an abstract
representation it is possible to reason about transformations in a more general
way and to use highly optimized linear programming libraries to figure out the
optimal loop structure. These transformations can be used to do constant
propagation through arrays, remove dead loop iterations, optimize loops for
cache locality, optimize arrays, apply advanced automatic parallelization, drive
vectorization, or they can be used to do software pipelining.