4 Commits

Author	SHA1	Message	Date
Dávid Bolvanský	ee51c42e00	Reduce the number of attributes attached to each function ... This takes advantage of the implicit default behavior to reduce the number of attributes.	2021-02-20 06:57:47 +01:00
Roman Lebedev	03bd5198b6	[OldPM] Pass manager: run SROA after (simple) loop unrolling ... I have stumbled into this pretty accidentally, when rewriting some spaghetti-like code into something more structured, which involved using some `std::array<>`s. And to my surprise, the `alloca`s remained, causing about `+160%` perf regression. https://llvm-compile-time-tracker.com/compare.php?from=bb6f4d32aac3eecb51909f4facc625219307ee68&to=d563e66f40f9d4d145cb2050e41cb961e2b37785&stat=instructions suggests that this has geomean compile-time cost of `+0.08%`. Note that D68593 / cecc0d27ad58c0aed8ef9ed99bbf691e137a0f26 already did this chage for NewPM, but left OldPM in a pessimized state. This fixes [[ https://bugs.llvm.org/show_bug.cgi?id=40011 | PR40011 ]], [[ https://bugs.llvm.org/show_bug.cgi?id=42794 | PR42794 ]] and probably some other reports. Reviewed By: nikic, xbolva00 Differential Revision: https://reviews.llvm.org/D87972	2020-10-04 11:53:50 +03:00
Fangrui Song	e0b3a8c991	[CodeGenCXX][test] Use -fno-experimental-new-pass-manager for CodeGenCXX/union-tbaa2.cpp after D68593/llvmorg-10-init-8907-gcecc0d27ad5 ... It fails with -DENABLE_EXPERIMENTAL_NEW_PASS_MANAGER=0 builds. Temporarily use -fno-experimental-new-pass-manager while we are investigating the root cause.	2019-11-02 15:58:54 -07:00
Krzysztof Parzyszek	5960a57ef7	[CodeGen] Pessimize aliasing for member unions (and may-alias) objects ... Use the TBAA info of the omnipotent char for these objects. Differential Revision: https://reviews.llvm.org/D33328 llvm-svn: 303851	2017-05-25 12:55:47 +00:00