Skip to content

[core] Try going around a suspected clang vectoriser bug. #22060

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Draft
hageboeck wants to merge 1 commit into
base: master
Choose a base branch
from
+3 −0
Draft

[core] Try going around a suspected clang vectoriser bug. #22060

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
3 changes: 3 additions & 0 deletions core/base/src/TColorGradient.cxx
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -111,6 +111,9 @@
fColors.assign(colors, colors + nPoints * 4);

Double_t sum[4] = { 0., 0., 0., 0. };
// Clang vectoriser bug. The loop can break with -O2 -mavx2 or similar.
// https://github.com/llvm/llvm-project/issues/194008
#pragma clang loop vectorize(disable)

Check warning on line 116 in core/base/src/TColorGradient.cxx

View workflow job for this annotation

GitHub Actions / fedora44 

ignoring ‘#pragma clang loop’ [-Wunknown-pragmas]

Check warning on line 116 in core/base/src/TColorGradient.cxx

View workflow job for this annotation

GitHub Actions / alma8 

ignoring #pragma clang loop [-Wunknown-pragmas]

Check warning on line 116 in core/base/src/TColorGradient.cxx

View workflow job for this annotation

GitHub Actions / alma9 CMAKE_BUILD_TYPE=Debug 

ignoring ‘#pragma clang loop’ [-Wunknown-pragmas]

Check warning on line 116 in core/base/src/TColorGradient.cxx

View workflow job for this annotation

GitHub Actions / alma10 arm64 CMAKE_BUILD_TYPE=RelWithDebInfo, builtin_zlib=ON, builtin_zstd=ON, CMAKE_CXX_STANDARD=20 

ignoring ‘#pragma clang loop’ [-Wunknown-pragmas]

Check failure on line 116 in core/base/src/TColorGradient.cxx

View workflow job for this annotation

GitHub Actions / debian13 dev=ON, CMAKE_CXX_FLAGS=-Wsuggest-override 

ignoring ‘#pragma clang loop’ [-Werror=unknown-pragmas]

Check warning on line 116 in core/base/src/TColorGradient.cxx

View workflow job for this annotation

GitHub Actions / alma10 minimal build CMAKE_CXX_STANDARD=20 

ignoring ‘#pragma clang loop’ [-Wunknown-pragmas]

Check warning on line 116 in core/base/src/TColorGradient.cxx

View workflow job for this annotation

GitHub Actions / ubuntu2404 CMAKE_BUILD_TYPE=Debug 

ignoring ‘#pragma clang loop’ [-Wunknown-pragmas]

Check warning on line 116 in core/base/src/TColorGradient.cxx

View workflow job for this annotation

GitHub Actions / alma10 benchmark build CMAKE_CXX_STANDARD=20 

ignoring ‘#pragma clang loop’ [-Wunknown-pragmas]

Check warning on line 116 in core/base/src/TColorGradient.cxx

View workflow job for this annotation

GitHub Actions / alma10 

ignoring ‘#pragma clang loop’ [-Wunknown-pragmas]

Check warning on line 116 in core/base/src/TColorGradient.cxx

View workflow job for this annotation

GitHub Actions / rawhide Fedora pydebug CMAKE_CXX_STANDARD=23 

ignoring ‘#pragma clang loop’ [-Wunknown-pragmas]

Check warning on line 116 in core/base/src/TColorGradient.cxx

View workflow job for this annotation

GitHub Actions / ubuntu2604 

ignoring ‘#pragma clang loop’ [-Wunknown-pragmas]

Check warning on line 116 in core/base/src/TColorGradient.cxx

View workflow job for this annotation

GitHub Actions / ubuntu22 imt=Off, CMAKE_BUILD_TYPE=Debug 

ignoring ‘#pragma clang loop’ [-Wunknown-pragmas]

Check warning on line 116 in core/base/src/TColorGradient.cxx

View workflow job for this annotation

GitHub Actions / alma9 modules_off CMAKE_CXX_STANDARD=20 

ignoring ‘#pragma clang loop’ [-Wunknown-pragmas]

Check warning on line 116 in core/base/src/TColorGradient.cxx

View workflow job for this annotation

GitHub Actions / fedora43 

ignoring ‘#pragma clang loop’ [-Wunknown-pragmas]

Check warning on line 116 in core/base/src/TColorGradient.cxx

View workflow job for this annotation

GitHub Actions / opensuse15 march_native 

ignoring ‘#pragma clang loop’ [-Wunknown-pragmas]
for (unsigned n = 0; n < fColors.size(); ++n)
sum[n % 4] += fColors[n];

Expand Down
Loading