here's a small testcase that shows cpu hog in 4.5.
for bigger files, the hog is much bigger :(
$ time g++43 1.ii -c -O1 -g2
g++43 1.ii -c -O1 -g2 11,25s user 0,20s system 99% cpu 11,474 total
$ time g++44 1.ii -c -O1 -g2
g++44 1.ii -c -O1 -g2 8,53s user 0,25s system 99% cpu 8,795 total
$ time g++45 1.ii -c -O1 -g2
1.ii: In member function 'void es::ClockAnalyzer::initPrimitives()':
1.ii:38722:7: note: variable tracking size limit exceeded with
-fvar-tracking-assignments, retrying without
g++45 1.ii -c -O1 -g2 34,73s user 0,45s system 99% cpu 35,237 total
--
Summary: cpu hog with '-O1 -g2' / var-tracking issue?
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: pluto at agmk dot net
GCC host triplet: x86_64-gnu-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43776
