[Bug middle-end/39284] Computed gotos combined too aggressively

[rguenth at gcc dot gnu dot org]

------- Comment #6 from rguenth at gcc dot gnu dot org  2009-02-24 10:17 -------
rguenther@murzim:/tmp> gcc-4.4 -m32 -fno-strict-aliasing -fwrapv -O3 --param
max-goto-duplication-insns=100000  -S ceval.i 
rguenther@murzim:/tmp> egrep -c 'jmp[[:space:]]*\*' ceval.s
4
rguenther@murzim:/tmp> gcc-4.3 -m32 -fno-strict-aliasing -fwrapv -O3 --param
max-goto-duplication-insns=100000  -S ceval.i 
rguenther@murzim:/tmp> egrep -c 'jmp[[:space:]]*\*' ceval.s
5
rguenther@murzim:/tmp> gcc-4.2 -m32 -fno-strict-aliasing -fwrapv -O3 --param
max-goto-duplication-insns=100000  -S ceval.i 
rguenther@murzim:/tmp> egrep -c 'jmp[[:space:]]*\*' ceval.s
5
rguenther@murzim:/tmp> gcc-4.1 -m32 -fno-strict-aliasing -fwrapv -O3 --param
max-goto-duplication-insns=100000  -S ceval.i 
rguenther@murzim:/tmp> egrep -c 'jmp[[:space:]]*\*' ceval.s
19

How many gotos do you expect?


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hubicka at gcc dot gnu dot
                   |                            |org
           Keywords|                            |missed-optimization


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39284