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* [Bug c++/98895] New: C++ module generates too many dead code @ 2021-01-29 21:46 unlvsur at live dot com 2021-01-29 21:49 ` [Bug c++/98895] " unlvsur at live dot com ` (2 more replies) 0 siblings, 3 replies; 4+ messages in thread From: unlvsur at live dot com @ 2021-01-29 21:46 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98895 Bug ID: 98895 Summary: C++ module generates too many dead code Product: gcc Version: 11.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: unlvsur at live dot com Target Milestone: --- It is a general issue. Any module unit will generate a dead entry that is completely unused. If those issues cannot be solved, I am sorry, I would only say C++20 modules failed completely. I do not think it has anything to do with tree-optimizations. The compiler just should NOT emit any code to the middle-end because of the module tbh. The module should not affect how the assembly is generated. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/98895] C++ module generates too many dead code 2021-01-29 21:46 [Bug c++/98895] New: C++ module generates too many dead code unlvsur at live dot com @ 2021-01-29 21:49 ` unlvsur at live dot com 2021-01-30 9:38 ` pilarlatiesa at gmail dot com 2022-11-03 13:12 ` ppalka at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: unlvsur at live dot com @ 2021-01-29 21:49 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98895 cqwrteur <unlvsur at live dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Target| |All Host| |All --- Comment #1 from cqwrteur <unlvsur at live dot com> --- #include<stdio.h> inline void test(char const* str) noexcept { puts(str); } int main() { test("Hello\n"); } hello.cc module; #include<stdio.h> export module hello; export inline void test(char const* str) noexcept { puts(str); } main.cc import hello; int main() { test("Hello\n"); } The 2nd generates a larger binary because it emits dead module entry. Please remove all dead code thank you. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/98895] C++ module generates too many dead code 2021-01-29 21:46 [Bug c++/98895] New: C++ module generates too many dead code unlvsur at live dot com 2021-01-29 21:49 ` [Bug c++/98895] " unlvsur at live dot com @ 2021-01-30 9:38 ` pilarlatiesa at gmail dot com 2022-11-03 13:12 ` ppalka at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: pilarlatiesa at gmail dot com @ 2021-01-30 9:38 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98895 --- Comment #2 from Pilar Latiesa <pilarlatiesa at gmail dot com> --- (In reply to cqwrteur from comment #0) > If those issues cannot be solved, I am sorry, I would only say C++20 modules > failed completely. What do you expect from being so offensive? Is this comment necessary at all? Do you realize that some people have devoted several years of work to have the feature ready for us to use it for free? ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/98895] C++ module generates too many dead code 2021-01-29 21:46 [Bug c++/98895] New: C++ module generates too many dead code unlvsur at live dot com 2021-01-29 21:49 ` [Bug c++/98895] " unlvsur at live dot com 2021-01-30 9:38 ` pilarlatiesa at gmail dot com @ 2022-11-03 13:12 ` ppalka at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: ppalka at gcc dot gnu.org @ 2022-11-03 13:12 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98895 Patrick Palka <ppalka at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |ppalka at gcc dot gnu.org Resolution|--- |FIXED Target Milestone|--- |13.0 Status|UNCONFIRMED |RESOLVED --- Comment #3 from Patrick Palka <ppalka at gcc dot gnu.org> --- I suspect this is fixed on trunk by r13-1090-ge8609768fbbc1e ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2022-11-03 13:12 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2021-01-29 21:46 [Bug c++/98895] New: C++ module generates too many dead code unlvsur at live dot com 2021-01-29 21:49 ` [Bug c++/98895] " unlvsur at live dot com 2021-01-30 9:38 ` pilarlatiesa at gmail dot com 2022-11-03 13:12 ` ppalka at gcc dot gnu.org
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