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From: "miles at gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/56775] New: -flto and -fprofile-generate together result in a link-time internal compiler error (in "add_symbol_to_partition")
Date: Fri, 29 Mar 2013 05:40:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56775

             Bug #: 56775
           Summary: -flto and -fprofile-generate together result in a
                    link-time internal compiler error (in
                    "add_symbol_to_partition")
    Classification: Unclassified
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: lto
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: miles@gnu.org


If I compile my program with _both_ options "-flto" and "-fprofile-generate", I
get a link-time compile error.

Using either "-flto" or "-fprofile-generate" _separately_ seems to work
correctly.

Compiler version is:
g++ (Debian 20130316-1) 4.8.0 20130316 (experimental) [trunk revision 196694]

I'm not exactly sure how to cut this down...trivial test cases don't seem to
have the same problem.

A transcript of the final link (the options passed when compiling each object
file are similar, minus libraries etc):

% make V=1 EXTRA_COMPILE_FLAGS=-fprofile-generate
make  all-am
make[1]: Entering directory `/home/miles/src/snogray/snogray'
g++-snapshot -O3 -fomit-frame-pointer -flto -ffast-math -march=native
-mfpmath=sse -g -std=c++11 -Wall -Wextra -Winit-self -Wdouble-promotion
-pedantic-errors -Wno-long-long -fprofile-generate -fno-finite-math-only
-ftrapping-math -fno-associative-math -ffunction-sections -pthread 
-Wl,--icf=all  -o snogray snogray.o recover-image.o libsnoglua.a libsnograw.a
liblpeg.a -L/usr//lib -lluajit-5.1   libsnogrdrive.a libsnogloaders.a -l3ds
libsnogmat.a libsnogsurf.a libsnoglight.a libsnogrender.a libsnogtex.a
libsnogspace.a libsnogscene.a libsnogimagecli.a libsnogimage.a -lpng12  
-pthread -lIlmImf -lz -lImath -lHalf -lIex -lIlmThread   -ljpeg -lnetpbm
libsnogcolor.a libsnogcli.a libsnogutil.a 
lto1: internal compiler error: in add_symbol_to_partition, at
lto/lto-partition.c:284
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-snapshot/README.Bugs> for instructions.
lto-wrapper: g++ returned 1 exit status
/usr/bin/ld: fatal error: lto-wrapper failed
collect2: error: ld returned 1 exit status
make[1]: *** [snogray] Error 1
make[1]: Leaving directory `/home/miles/src/snogray/snogray'
make: *** [all] Error 2