From: "Haynes, Dan" <Haynes@pwrh.com>
To: Holger Burkarth <burkarth@prodad.de>, gnu-win32@cygnus.com
Subject: RE: Gcc
Date: Sun, 29 Nov 1998 10:34:00 -0000 [thread overview]
Message-ID: <83A5B9068368D211BDE90060B06A21BA2E73F4@bozeman.pwrh.com> (raw)
const char *Tst = "" = pointer to constant of type 'char'
const char * const Tst = "" = constant pointer to constant of type 'char'
Regards
Dan Haynes
> -----Original Message-----
> From: Holger Burkarth [ mailto:burkarth@prodad.de ]
> Sent: Sunday, November 29, 1998 4:05 AM
> To: gnu-win32@cygnus.com
> Subject: Gcc
>
>
> Hi,
>
> i have a little question, the normaly so good
> gcc machine-code, is in any case not
> so good, what is the reason ?
>
>
>
>
> ------ Source -------
> void test2()
> {
> const char* Tst="";
>
> if(Tst != NULL) printf(Tst);
> }
>
>
>
> $ gcc main.cpp -O2 -S
>
>
>
> ------ Output -------
> .file"main.cc"
> # GNU C++ version egcs-2.91.57 19980901 (egcs-1.1 release)
> # (i686-pc-cygwin32) compiled by GNU C version egcs-2.91.57 19980901
> # (egcs-1.1 release).
> # options passed: -mcpu=i486 -mno-stack-arg-probe -O2
> -Wchar-subscripts
> # -Wcomment -Wimplicit -Wparentheses -Wreturn-type -Wunused
> # -Wuninitialized -Wshadow -Wwrite-strings
> -Waggregate-return -Winline
> # -fno-exceptions -fomit-frame-pointer -fverbose-asm
> # options enabled: -fdefer-pop -fomit-frame-pointer
> -fcse-follow-jumps
> # -fcse-skip-blocks -fexpensive-optimizations -fthread-jumps
> # -fstrength-reduce -fpeephole -fforce-mem -ffunction-cse -finline
> # -fkeep-static-consts -fcaller-saves -freg-struct-return -fgcse
> # -frerun-cse-after-loop -frerun-loop-opt -fschedule-insns2
> # -fsjlj-exceptions -fcommon -fverbose-asm -fgnu-linker -fregmove
> # -foptimize-register-move -fargument-alias -m80387 -mhard-float
> # -mno-soft-float -mieee-fp -mfp-ret-in-387
> -mschedule-prologue -mcpu=i686
> # -march=pentium
>
> gcc2_compiled.:
> ___gnu_compiled_cplusplus:
> .text
> LC0:
> .ascii "\0"
> .globl _Test2__Fv
>
> _Test2__Fv:
> movl $LC0,%eax
> testl %eax,%eax
> je L138 <- why this ?
> pushl %eax
> call _printf
> addl $4,%esp
> L138:
> ret
>
>
> --
> Holger Burkarth
> Software-Developer
> burkarth@prodad.de
> http://www.prodad.de
>
> -
> For help on using this list (especially unsubscribing), send
> a message to
> "gnu-win32-request@cygnus.com" with one line of text: "help".
>
-
For help on using this list (especially unsubscribing), send a message to
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next reply other threads:[~1998-11-29 10:34 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-11-29 10:34 Haynes, Dan [this message]
-- strict thread matches above, loose matches on Subject: below --
2008-08-18 11:56 GCC John Emmas
2008-08-18 12:11 ` GCC Hugh Sasse
2008-08-18 12:20 ` GCC John Emmas
2002-05-25 9:46 gcc hongxun lee
2002-01-02 9:14 gcc Givon Zirkind
2002-01-03 16:21 ` gcc Tim Prince
2001-05-07 17:49 gcc Bryan Higgins
2001-05-08 6:00 ` gcc Earnie Boyd
2001-03-31 11:06 gcc John Weeks
2001-03-31 13:06 ` gcc Christopher Faylor
2001-03-31 14:14 ` gcc John Weeks
2001-03-31 14:24 ` gcc Christopher Faylor
2000-11-09 11:01 GCC Earnie Boyd
2000-11-09 7:19 GCC Schaible, Joerg
2000-11-09 7:13 GCC Milan Stanojevic
2000-11-09 7:19 ` GCC Cal Erickson
2000-11-09 10:45 ` GCC Milan Stanojevic
1999-09-14 5:48 GCC Earnie Boyd
1999-09-14 6:54 ` GCC Kai Henningsen
1999-09-30 23:42 ` GCC Kai Henningsen
1999-09-30 23:42 ` GCC Earnie Boyd
1999-09-13 8:16 GCC Earnie Boyd
1999-09-14 2:00 ` GCC Kai Henningsen
1999-09-14 9:56 ` GCC Michael V. Nikolaev
1999-09-30 23:42 ` GCC Michael V. Nikolaev
1999-09-30 23:42 ` GCC Kai Henningsen
1999-09-30 23:42 ` GCC Earnie Boyd
1999-08-23 8:50 GCC hark sng-
1999-08-23 9:59 ` GCC Mumit Khan
1999-08-31 23:49 ` GCC Mumit Khan
1999-09-13 8:01 ` GCC Kai Henningsen
1999-09-13 8:54 ` GCC Mumit Khan
1999-09-14 1:54 ` GCC Kai Henningsen
1999-09-14 9:41 ` GCC Mumit Khan
1999-09-30 23:42 ` GCC Mumit Khan
1999-09-30 23:42 ` GCC Kai Henningsen
1999-09-30 23:42 ` GCC Mumit Khan
1999-09-30 23:42 ` GCC Kai Henningsen
1999-08-31 23:49 ` GCC hark sng-
1998-11-29 1:32 Gcc Holger Burkarth
1998-11-03 13:49 gcc marc_auslander
1998-07-08 10:01 GCC Earnie Boyd
1998-07-03 16:33 GCC Bruno da Rocha
1997-12-05 6:13 gcc Mark Young (in6)
1997-10-16 20:09 GCC Earnie Boyd
1997-10-15 17:59 GCC David Vang
1997-10-08 2:57 gcc Brad Haack
1997-09-24 2:09 gcc nazg
1997-09-23 13:38 gcc Earnie Boyd
1997-09-22 9:29 gcc Earnie Boyd
1997-09-22 6:23 gcc nazg
1997-09-20 0:35 gcc young lee
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