http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56113
Bug #: 56113
Summary: out of memory when compiling a function with many goto
labels (50k > )
Classification: Unclassified
Product: gcc
Version: 4.6.3
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: aixe...@gmail.com
Out of memory when compiling a function with many goto labels (50k > )
gcc 4.6.3 compiler(running on top of ubuntu 12.04 32-bit) failed to output an
object for a function when it comes with extremely large number of goto
labels.
Attached is a simple script that generates the test source file. Here's how to
reproduce a failure with the script.
~$./goto_gen.py 60000 t.c
~$ time cc -O1 -o t t.c
cc1: out of memory allocating 4064 bytes after a total of 2309808128 bytes
real 11m44.371s
user 11m42.592s
sys 0m1.876s
~$ time cc -O0 -o t t.c
real 22m5.106s
user 22m3.539s
sys 0m1.640s
As you can see from the above, -O1 option trigger the problem while -O0
doesn't.
Could you anyone tell me how to workaround this situation? Or which specific
optimization option causes the issue?
Thanks a lot for your help in advance.
Regards, Kangkook
