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Roman Lebedev 6ab1a4858d [X86][CostModel] Fix cost model for non-power-of-two vector load/stores 
Sometimes LV has to produce really wide vectors,
and sometimes they end up being not powers of two.
As it can be seen from the diff, the cost computation
is currently completely non-sensical in those cases.

Instead of just scalarizing everything, split/factorize the wide vector
into a number of subvectors, each one having a power-of-two elements,
recurse to get the cost of op on this subvector. Also, check how we'd
legalize this subvector, and if the legalized type is scalar,
also account for the scalarization cost.

Note that for sub-vector loads, we might be able to do better,
when the vectors are properly aligned.

Reviewed By: RKSimon

Differential Revision: https://reviews.llvm.org/D100099
2021-04-16 15:30:57 +03:00
benchmarks
bindings [NFC][OCaml] Reformat to clean up following CAMLprim removal 2021-04-05 10:55:08 +01:00
cmake [mlgo] Skip AOT-compiling a model if a header/object pair is provided 2021-04-13 09:46:29 -07:00
docs [docs] Add vector predication call 2021-04-16 10:49:34 +02:00
examples [Orc][examples] Add missing FileCheck for lit test and polish output 2021-04-07 11:12:20 +02:00
include [SystemZ][z/OS][Windows] Add new functions that set Text/Binary mode for Stdin and Stdout based on OpenFlags 2021-04-16 08:09:19 -04:00
lib [X86][CostModel] Fix cost model for non-power-of-two vector load/stores 2021-04-16 15:30:57 +03:00
projects llvmbuildectomy - replace llvm-build by plain cmake 2020-11-13 10:35:24 +01:00
resources
runtimes [runtimes] Add the libc project to the list of runtimes. 2021-03-23 17:33:03 +00:00
test [X86][CostModel] Fix cost model for non-power-of-two vector load/stores 2021-04-16 15:30:57 +03:00
tools [llvm-objcopy] clang-format a line 2021-04-16 07:24:43 -04:00
unittests [mlir] Add support for walking locations similarly to Operations 2021-04-15 16:09:34 -07:00
utils [gn build] Port 3bc88eb3924f 2021-04-16 01:16:51 +00:00
.clang-format
.clang-tidy - Update .clang-tidy to ignore parameters of main like functions for naming violations in clang and llvm directory 2020-01-31 16:49:45 +00:00
.gitattributes
.gitignore Remove .gitignore entries not relevant in the monorepo. 2021-04-07 12:25:02 -07:00
CMakeLists.txt [mlgo] fix build rules 2021-04-03 12:49:03 -07:00
CODE_OWNERS.TXT [M68k][CODE_OWNERS](0/8) Add code owner for the M68k target 2021-03-08 12:30:56 -08:00
configure
CREDITS.TXT Update personal info in CREDITS.TXT 2021-04-11 19:25:02 +08:00
LICENSE.TXT
llvm.spec.in
README.txt Test commit. 2020-03-14 18:08:26 -07:00
RELEASE_TESTERS.TXT

README.txt 

The LLVM Compiler Infrastructure
================================

This directory and its subdirectories contain source code for LLVM,
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LLVM is open source software. You may freely distribute it under the terms of
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Please see the documentation provided in docs/ for further
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If you are writing a package for LLVM, see docs/Packaging.rst for our
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