https://bugs.llvm.org/show_bug.cgi?id=38912
Bug ID: 38912
Summary: GVNHoist calls IDFCalculator::calculate() passing an
non-empty vector
Product: tools
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: opt
Assignee: unassignedb...@nondot.org
Reporter: alexandros.lamprin...@arm.com
CC: llvm-bugs@lists.llvm.org
The same underlying bug was initially addressed by rL340818: [GVNHoist] Prune
out useless CHI insertions, where we realized GVNHoist was using excessive
memory. It appears that this wasn't the right fix, since the ubsan buildbot
kept failing with timeouts. On my machine compiling SemaChecking.cpp with
clang++ and both GVNHoist/Ubsan enabled takes approximately half an hour. The
real problem is in GVNHoist::computeInsertionPoints(), where we iterate over
the Value Numbers and calculate the Iterated Dominance Frontiers without
clearing the IDFBlocks vector first.
--
You are receiving this mail because:
You are on the CC list for the bug._______________________________________________
llvm-bugs mailing list
llvm-bugs@lists.llvm.org
http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
