Date: Fri, 11 Oct 1996 21:05:36 +0200 From: "Philippe Charnier" <charnier@xp11.frmug.org> To: current@FreeBSD.org Subject: gcc's bug. please comment Message-ID: <199610111905.VAA01615@xp11.frmug.org>
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Hello,
A friend found a bug in gcc-2.7.2.1. The following program fails on
i386 architecture (both FreeBSD and solaris-x86) and works as expected
on sparc (both sunos and solaris2.5.1) and on hp (hp-ux9.07). As I'm
not on the gcc-bug list, please comment before I report the bug. This
afternoon I sent a bug report to Sun but it was before trying on
FreeBSD.
The output should be `1 2' but it is `2 1' on i386 computers.
Here is the code:
----------mypb2.c-----------------
#include <stdio.h>
#include <stdlib.h>
main()
{ FILE *fic;
int a[2][50], i = 0;
fic=fopen("mypb2.csv","r");
fscanf(fic, "%d;%d", &a[1][i++], &a[1][i++]);
i = 0;
while (i < 2) printf("%d ", a[1][i++]);
printf("\n");
fclose(fic);
}
----------------------------------
---------------mypb2.csv----------
1;2
----------------------------------
For those that do not have a solaris-2.5 box to test on, here is the assembly
output of the compiler.
.file "mypb2.c"
.version "01.01"
gcc2_compiled.:
.section .rodata
.LC0:
.string "r"
.LC1:
.string "mypb2.csv"
.LC2:
.string "%d;%d"
.LC3:
.string "%d "
.LC4:
.string "\n"
.text
.align 4
.globl main
.type main,@function
main:
pushl %ebp
movl %esp,%ebp
subl $408,%esp
movl $0,-408(%ebp)
pushl $.LC0
pushl $.LC1
call fopen
addl $8,%esp
movl %eax,%eax
movl %eax,-4(%ebp)
leal -404(%ebp),%eax
movl -408(%ebp),%edx
movl %edx,%ecx
leal 0(,%ecx,4),%edx
leal 200(%edx),%ecx
addl %ecx,%eax
pushl %eax
incl -408(%ebp)
leal -404(%ebp),%eax
movl -408(%ebp),%edx
movl %edx,%ecx
leal 0(,%ecx,4),%edx
leal 200(%edx),%ecx
addl %ecx,%eax
pushl %eax
incl -408(%ebp)
pushl $.LC2
movl -4(%ebp),%eax
pushl %eax
call fscanf
addl $16,%esp
movl $0,-408(%ebp)
.L2:
cmpl $1,-408(%ebp)
jle .L4
jmp .L3
.align 4
.L4:
movl -408(%ebp),%eax
movl -204(%ebp,%eax,4),%edx
pushl %edx
incl -408(%ebp)
pushl $.LC3
call printf
addl $8,%esp
jmp .L2
.align 4
.L3:
pushl $.LC4
call printf
addl $4,%esp
movl -4(%ebp),%eax
pushl %eax
call fclose
addl $4,%esp
.L1:
leave
ret
.Lfe1:
.size main,.Lfe1-main
.ident "GCC: (GNU) 2.7.2.1"
------ ------
Philippe Charnier charnier@lirmm.fr (smtp)
charnier@xp11.frmug.org (uucp)
``a PC not running FreeBSD is like a venusian with no tentacles''
------------------------------------------------------------------------
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