[Bug c/41095] New: 4x bigger object when compiled with -O3 option

["ami_stuff at o2 dot pl" <gcc-bugzilla at gcc dot gnu dot org>]

Hi,

When I compile "libavcodec/dsputil.c" file from FFmpeg package with these
options (-O2 -fipa-cp-clone -finline-functions -fgcse-after-reload
-ftree-vectorize -fpredictive-commoning -funswitch-loops):

OPTFLAGS= -mnobitfield -m68060 -std=c99  -Wdeclaration-after-statement
-Wdisabled-optimization -fno-math-errno -D_ISOC99_SOURCE
-D_POSIX_C_SOURCE=200112 -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -fno-common
-fomit-frame-pointer -Wall -Wno-switch -Wpointer-arith -Wredundant-decls
-Wcast-qual -Wwrite-strings -Wundef -O2 -fipa-cp-clone -finline-functions
-fgcse-after-reload -ftree-vectorize -fpredictive-commoning -funswitch-loops

I get "dsputil.o" with size of 306kb.

When I compile "dsputil.c" with -O3 option:

OPTFLAGS= -mnobitfield -m68060 -std=c99  -Wdeclaration-after-statement
-Wdisabled-optimization -fno-math-errno -D_ISOC99_SOURCE
-D_POSIX_C_SOURCE=200112 -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -fno-common
-fomit-frame-pointer -Wall -Wno-switch -Wpointer-arith -Wredundant-decls
-Wcast-qual -Wwrite-strings -Wundef -O3

I get "dsputil.o" with size of 1,18mb.


-- 
           Summary: 4x bigger object when compiled with -O3 option
           Product: gcc
           Version: 4.4.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ami_stuff at o2 dot pl
  GCC host triplet: i686-cygwin
GCC target triplet: m68k-amigaos


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41095