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Groups > comp.lang.c > #146548
| From | scott@slp53.sl.home (Scott Lurndal) |
|---|---|
| Subject | Re: alloca()-support |
| Newsgroups | comp.lang.c++, comp.lang.c |
| References | (3 earlier) <qmtc2o$pmp$4@dont-email.me> <qmtc6v$uk5$1@news.albasani.net> <qmtfeh$gno$1@dont-email.me> <lRskF.22050$XA2.21391@fx05.iad> <qn4mlg$3f4$2@dont-email.me> |
| Message-ID | <cDmlF.9601$KB2.8901@fx02.iad> (permalink) |
| Organization | UsenetServer - www.usenetserver.com |
| Date | 2019-10-03 13:23 +0000 |
Cross-posted to 2 groups.
Soviet_Mario <SovietMario@CCCP.MIR> writes:
>On 30/09/2019 21:38, Scott Lurndal wrote:
>> Soviet_Mario <SovietMario@CCCP.MIR> writes:
>>> On 30/09/2019 18:58, Bonita Montero wrote:
>>>>>>> Since when (if at any time) was variable size automatic
>>>>>>> array supported ?
>the code I'd like to see in .asm intermediate code (NO
>OPTIMIZATION ACTIVE) was
>
>
>
>int Funz (int A, int B)
>{
>int C = 3;
>int Buf [A];
>int D = 2;
>Buf [A-1] = B;
>return (A + B * D - C);
>}
>
00000000004004f0 <Funz>:
4004f0: 55 push %rbp
4004f1: 48 89 e5 mov %rsp,%rbp
4004f4: 53 push %rbx
4004f5: 48 83 ec 38 sub $0x38,%rsp // Reserve frame
4004f9: 89 7d cc mov %edi,-0x34(%rbp)
4004fc: 89 75 c8 mov %esi,-0x38(%rbp)
4004ff: 48 89 e0 mov %rsp,%rax
400502: 48 89 c6 mov %rax,%rsi
400505: c7 45 ec 03 00 00 00 movl $0x3,-0x14(%rbp)
40050c: 8b 45 cc mov -0x34(%rbp),%eax
40050f: 48 63 f8 movslq %eax,%rdi
400512: 48 83 ef 01 sub $0x1,%rdi
400516: 48 89 7d e0 mov %rdi,-0x20(%rbp)
40051a: 48 63 f8 movslq %eax,%rdi
40051d: 49 89 f8 mov %rdi,%r8
400520: 41 b9 00 00 00 00 mov $0x0,%r9d
400526: 48 63 f8 movslq %eax,%rdi
400529: 48 89 fa mov %rdi,%rdx
40052c: b9 00 00 00 00 mov $0x0,%ecx
400531: 48 98 cltq
400533: 48 c1 e0 02 shl $0x2,%rax
400537: 48 8d 50 03 lea 0x3(%rax),%rdx
40053b: b8 10 00 00 00 mov $0x10,%eax
400540: 48 83 e8 01 sub $0x1,%rax
400544: 48 01 d0 add %rdx,%rax
400547: bb 10 00 00 00 mov $0x10,%ebx
40054c: ba 00 00 00 00 mov $0x0,%edx
400551: 48 f7 f3 div %rbx
400554: 48 6b c0 10 imul $0x10,%rax,%rax
400558: 48 29 c4 sub %rax,%rsp // Allocate Buf[A]
40055b: 48 89 e0 mov %rsp,%rax // %rax = &Buf[0]
40055e: 48 83 c0 03 add $0x3,%rax // dword align pointer
400562: 48 c1 e8 02 shr $0x2,%rax
400566: 48 c1 e0 02 shl $0x2,%rax
40056a: 48 89 45 d8 mov %rax,-0x28(%rbp) // Save Buf addr in frame
40056e: c7 45 d4 02 00 00 00 movl $0x2,-0x2c(%rbp)
400575: 8b 45 cc mov -0x34(%rbp),%eax
400578: 8d 50 ff lea -0x1(%rax),%edx
40057b: 48 8b 45 d8 mov -0x28(%rbp),%rax
40057f: 48 63 d2 movslq %edx,%rdx
400582: 8b 4d c8 mov -0x38(%rbp),%ecx
400585: 89 0c 90 mov %ecx,(%rax,%rdx,4)
400588: 8b 45 c8 mov -0x38(%rbp),%eax
40058b: 0f af 45 d4 imul -0x2c(%rbp),%eax
40058f: 89 c2 mov %eax,%edx
400591: 8b 45 cc mov -0x34(%rbp),%eax
400594: 01 d0 add %edx,%eax
400596: 2b 45 ec sub -0x14(%rbp),%eax
400599: 48 89 f4 mov %rsi,%rsp
40059c: 48 8b 5d f8 mov -0x8(%rbp),%rbx
4005a0: c9 leaveq
4005a1: c3 retq
Back to comp.lang.c | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-09-30 14:02 +0200
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-09-30 16:09 +0200
Re: alloca()-support Bo Persson <bo@bo-persson.se> - 2019-09-30 17:29 +0200
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-09-30 17:33 +0200
Re: alloca()-support Anton Shepelev <anton.txt@g{oogle}mail.com> - 2019-09-30 17:12 +0300
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-09-30 16:16 +0200
Re: alloca()-support Anton Shepelev <anton.txt@g{oogle}mail.com> - 2019-09-30 17:30 +0300
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-09-30 16:44 +0200
Re: alloca()-support Anton Shepelev <anton.txt@gmail.com> - 2019-10-02 00:36 +0300
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-10-02 06:28 +0200
Re: alloca()-support Anton Shepelev <anton.txt@gmail.com> - 2019-10-02 16:08 +0300
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-10-02 15:42 +0200
Re: alloca()-support scott@slp53.sl.home (Scott Lurndal) - 2019-09-30 14:30 +0000
Re: alloca()-support Anton Shepelev <anton.txt@g{oogle}mail.com> - 2019-09-30 17:33 +0300
Re: alloca()-support David Brown <david.brown@hesbynett.no> - 2019-09-30 16:56 +0200
Re: alloca()-support Melzzzzz <Melzzzzz@zzzzz.com> - 2019-09-30 15:29 +0000
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-09-30 17:31 +0200
Re: alloca()-support Melzzzzz <Melzzzzz@zzzzz.com> - 2019-10-01 07:03 +0000
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-10-01 10:57 +0200
Re: alloca()-support Melzzzzz <Melzzzzz@zzzzz.com> - 2019-10-01 18:49 +0000
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-10-01 21:20 +0200
Re: alloca()-support scott@slp53.sl.home (Scott Lurndal) - 2019-10-01 20:39 +0000
Re: alloca()-support Melzzzzz <Melzzzzz@zzzzz.com> - 2019-10-02 04:15 +0000
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-10-02 06:28 +0200
Re: alloca()-support Melzzzzz <Melzzzzz@zzzzz.com> - 2019-10-02 04:29 +0000
Re: alloca()-support Keith Thompson <kst-u@mib.org> - 2019-09-30 11:14 -0700
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-09-30 18:04 +0200
Re: alloca()-support William Ahern <william@25thandClement.com> - 2019-09-30 11:01 -0700
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-10-01 07:19 +0200
Re: alloca()-support Paavo Helde <myfirstname@osa.pri.ee> - 2019-09-30 22:26 +0300
Re: alloca()-support scott@slp53.sl.home (Scott Lurndal) - 2019-09-30 19:46 +0000
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-10-01 07:32 +0200
Re: alloca()-support Paavo Helde <myfirstname@osa.pri.ee> - 2019-10-01 09:08 +0300
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-10-01 08:35 +0200
Re: alloca()-support gazelle@shell.xmission.com (Kenny McCormack) - 2019-09-30 16:26 +0000
Re: alloca()-support Soviet_Mario <SovietMario@CCCP.MIR> - 2019-09-30 18:48 +0200
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-09-30 18:51 +0200
Re: alloca()-support Soviet_Mario <SovietMario@CCCP.MIR> - 2019-09-30 18:55 +0200
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-09-30 18:58 +0200
Re: alloca()-support Soviet_Mario <SovietMario@CCCP.MIR> - 2019-09-30 19:53 +0200
Re: alloca()-support Keith Thompson <kst-u@mib.org> - 2019-09-30 11:13 -0700
Re: alloca()-support Tim Rentsch <tr.17687@z991.linuxsc.com> - 2019-10-06 06:16 -0700
Re: alloca()-support Anton Shepelev <anton.txt@gmail.com> - 2019-10-06 16:22 +0300
Re: alloca()-support Keith Thompson <kst-u@mib.org> - 2019-10-06 12:58 -0700
Re: alloca()-support "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2019-10-06 13:16 -0700
Re: alloca()-support scott@slp53.sl.home (Scott Lurndal) - 2019-09-30 19:38 +0000
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-10-01 07:41 +0200
Re: alloca()-support scott@slp53.sl.home (Scott Lurndal) - 2019-10-01 15:19 +0000
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-10-01 17:31 +0200
Re: alloca()-support Melzzzzz <Melzzzzz@zzzzz.com> - 2019-10-01 18:58 +0000
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-10-01 21:24 +0200
Re: alloca()-support Melzzzzz <Melzzzzz@zzzzz.com> - 2019-10-02 04:28 +0000
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-10-02 06:30 +0200
Re: alloca()-support Melzzzzz <Melzzzzz@zzzzz.com> - 2019-10-02 04:36 +0000
Re: alloca()-support David Brown <david.brown@hesbynett.no> - 2019-10-02 10:01 +0200
Re: alloca()-support Melzzzzz <Melzzzzz@zzzzz.com> - 2019-10-02 04:42 +0000
Re: alloca()-support David Brown <david.brown@hesbynett.no> - 2019-10-02 10:10 +0200
Re: alloca()-support Mel <mel@zzzzz.com> - 2019-10-02 15:13 +0200
Re: alloca()-support David Brown <david.brown@hesbynett.no> - 2019-10-01 21:10 +0200
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-10-01 21:25 +0200
Re: alloca()-support scott@slp53.sl.home (Scott Lurndal) - 2019-10-01 20:44 +0000
Re: alloca()-support David Brown <david.brown@hesbynett.no> - 2019-10-01 23:26 +0200
Re: alloca()-support Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2019-10-01 21:08 -0600
Re: alloca()-support David Brown <david.brown@hesbynett.no> - 2019-10-02 10:19 +0200
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-10-02 06:39 +0200
Re: alloca()-support David Brown <david.brown@hesbynett.no> - 2019-10-02 10:34 +0200
Re: alloca()-support Mel <mel@zzzzz.com> - 2019-10-02 15:14 +0200
Re: alloca()-support Mel <mel@zzzzz.com> - 2019-10-02 15:18 +0200
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-10-02 15:21 +0200
Re: alloca()-support Melzzzzz <Melzzzzz@zzzzz.com> - 2019-10-03 04:09 +0000
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-10-03 07:48 +0200
Re: alloca()-support Melzzzzz <Melzzzzz@zzzzz.com> - 2019-10-03 05:49 +0000
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-10-03 07:52 +0200
Re: alloca()-support Melzzzzz <Melzzzzz@zzzzz.com> - 2019-10-03 06:46 +0000
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-10-03 10:59 +0200
Re: alloca()-support Soviet_Mario <SovietMario@CCCP.MIR> - 2019-10-03 13:39 +0200
Re: alloca()-support scott@slp53.sl.home (Scott Lurndal) - 2019-10-03 13:23 +0000
Re: alloca()-support David Brown <david.brown@hesbynett.no> - 2019-10-03 15:38 +0200
Re: alloca()-support scott@slp53.sl.home (Scott Lurndal) - 2019-10-03 14:51 +0000
Re: alloca()-support David Brown <david.brown@hesbynett.no> - 2019-10-04 09:49 +0200
Re: alloca()-support Soviet_Mario <SovietMario@CCCP.MIR> - 2019-10-03 21:47 +0200
Re: alloca()-support David Brown <david.brown@hesbynett.no> - 2019-10-04 09:53 +0200
Re: alloca()-support Soviet_Mario <SovietMario@CCCP.MIR> - 2019-10-03 21:52 +0200
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-10-01 07:39 +0200
Re: alloca()-support James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-09-30 21:36 -0400
Re: alloca()-support Philipp Klaus Krause <pkk@spth.de> - 2019-09-30 19:14 +0200
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-09-30 19:16 +0200
Re: alloca()-support Robert Wessel <robertwessel2@yahoo.com> - 2019-10-01 00:18 -0500
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-10-01 07:43 +0200
Re: alloca()-support Keith Thompson <kst-u@mib.org> - 2019-10-01 02:42 -0700
Re: alloca()-support James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-10-01 08:11 -0400
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-10-01 14:53 +0200
Re: alloca()-support scott@slp53.sl.home (Scott Lurndal) - 2019-09-30 17:52 +0000
Re: alloca()-support Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2019-09-30 11:20 -0600
Re: alloca()-support Bonita Montero <Bonita.Montero@gmail.com> - 2019-09-30 19:42 +0200
Re: alloca()-support Soviet_Mario <SovietMario@CCCP.MIR> - 2019-09-30 20:02 +0200
Re: alloca()-support Soviet_Mario <SovietMario@CCCP.MIR> - 2019-09-30 19:54 +0200
Re: alloca()-support Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2019-09-30 14:28 -0600
Re: alloca()-support David Brown <david.brown@hesbynett.no> - 2019-10-01 09:38 +0200
Re: alloca()-support Soviet_Mario <SovietMario@CCCP.MIR> - 2019-09-30 20:01 +0200
Re: alloca()-support Manfred <noname@add.invalid> - 2019-10-01 17:45 +0200
Re: alloca()-support "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2019-10-02 02:35 -0700
Re: alloca()-support Anton Shepelev <anton.txt@gmail.com> - 2019-10-02 16:26 +0300
Re: alloca()-support jadill33@gmail.com - 2019-10-02 08:00 -0700
Re: alloca()-support Anton Shepelev <anton.txt@gmail.com> - 2019-10-03 02:38 +0300
Re: alloca()-support jadill33@gmail.com - 2019-10-03 08:42 -0700
Re: alloca()-support "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2019-10-02 12:33 -0700
Re: alloca()-support Anton Shepelev <anton.txt@gmail.com> - 2019-10-03 01:47 +0300
Re: alloca()-support "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2019-10-05 14:08 -0700
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