http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55092
Bug #: 55092
Summary: [4.8 Regression] LRA doesn't scale
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: hjl.to...@gmail.com
CC: vmaka...@redhat.com
From
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54402#c4
-----
As Uros says in bug 54507, the reflect test from libgo is another example.
Without var tracking it takes 20s on my x86_64 box (tested with a 32-bit
compiler). With var tracking it takes 46m 40s.
-----
It only happens with -m32. It takes less than 20 seconds for
-m64 and -mx32. Turn-off LRA takes only 13 seconds to finish.
