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[SampleFDO] Add profile symbol list section to discriminate function being cold versus function being newly added. This is the second half of https://reviews.llvm.org/D66374. Profile symbol list is the collection of function symbols showing up in the binary which generates the current profile. It is used to discriminate function being cold versus function being newly added. Profile symbol list is only added for profile with ExtBinary format. During profile use compilation, when profile-sample-accurate is enabled, a function without profile will be regarded as cold only when it is contained in that list. Differential Revision: https://reviews.llvm.org/D66766 llvm-svn: 370563
2019-08-31 10:27:26 +08:00
; REQUIRES: zlib
; Append inline.prof with profile symbol list and save it after compression.
[SampleFDO] Add compression support for any section in ExtBinary profile format Previously ExtBinary profile format only supports compression using zlib for profile symbol list. In this patch, we extend the compression support to any section. User can select some or all of the sections to compress. In an experiment, for a 45M profile in ExtBinary format, compressing name table reduced its size to 24M, and compressing all the sections reduced its size to 11M. Differential Revision: https://reviews.llvm.org/D68253 llvm-svn: 373914
2019-10-08 00:12:37 +08:00
; RUN: llvm-profdata merge --sample --prof-sym-list=%S/Inputs/profile-symbol-list.text --compress-all-sections=true --extbinary %S/Inputs/inline.prof --output=%t.profdata
[SampleFDO] Create a separate flag profile-accurate-for-symsinlist to handle profile symbol list. Currently many existing users using profile-sample-accurate want to reduce code size as much as possible. Their use cases are different from the scenario profile symbol list tries to handle -- the major motivation of adding profile symbol list is to get the major memory/code size saving without introduce performance regression. So to keep the behavior of profile-sample-accurate unchanged, we think decoupling these two things and using a new flag to control the handling of profile symbol list may be better. When profile-sample-accurate and the new flag profile-accurate-for-symsinlist are both present, since profile-sample-accurate is a user assertion we let it have a higher precedence. Differential Revision: https://reviews.llvm.org/D68047 llvm-svn: 373133
2019-09-28 06:33:59 +08:00
; RUN: opt < %S/Inputs/profile-symbol-list.ll -sample-profile -profile-accurate-for-symsinlist -sample-profile-file=%t.profdata -S | FileCheck %S/Inputs/profile-symbol-list.ll
; RUN: opt < %S/Inputs/profile-symbol-list.ll -passes=sample-profile -profile-accurate-for-symsinlist -sample-profile-file=%t.profdata -S | FileCheck %S/Inputs/profile-symbol-list.ll