https://bugs.llvm.org/show_bug.cgi?id=49473
Bug ID: 49473
Summary: 800x compile time regression for AVR.cpp on sparcv9
Product: new-bugs
Version: trunk
Hardware: Sun
OS: Solaris
Status: NEW
Severity: normal
Priority: P
Component: new bugs
Assignee: unassignedb...@nondot.org
Reporter: r...@gcc.gnu.org
CC: aeuba...@google.com, htmldevelo...@gmail.com,
llvm-bugs@lists.llvm.org
Created attachment 24601
--> https://bugs.llvm.org/attachment.cgi?id=24601&action=edit
-ftime report output
The compile time for clang/lib/Driver/ToolChains/AVR.cpp on Solaris/sparcv9 has
exploded recently: it grew from 4.92s to 1h 3m 50.16s, almost a factor of 800
and doubling the wall clock time of ninja -j96 on a Netra SPARC S7-2.
A reghunt identified the new PM as the culprit
commit 669ddd1e9b1226432b003dbba05b99f8e992285b
Author: Arthur Eubanks <aeuba...@google.com>
Date: Mon Jan 25 11:00:56 2021 -0800
Turn on the new pass manager by default
and indeed compile time is back to normal with -flegacy-pass-manager.
Unfortunately, a build with -DENABLE_EXPERIMENTAL_NEW_PASS_MANAGER=OFF fails:
FAILED:
tools/clang/tools/extra/clangd/CMakeFiles/obj.clangDaemon.dir/ClangdLSPServer.cpp.o
[...]
Did not see access type in access path!
store i64 %Handler.coerce1, i64* %.fca.1.gep, align 8, !tbaa !372
!372 = !{!370, !6, i64 8}
I'm attaching the -ftime-report output for reference.
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