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* Difference in assembly
@ 2004-12-29 11:09 Manmeet Singh Johar
2004-12-31 7:41 ` Manmeet Singh Johar
0 siblings, 1 reply; 2+ messages in thread
From: Manmeet Singh Johar @ 2004-12-29 11:09 UTC (permalink / raw)
To: gcc-bugs
Hello,
I am building cross compilers for SPARC variant for Cygwin and MingW
hosts. In the process I am faced with a very peculiar problem. For the
code shown below, though I am getting same assembly instructions in same
sequence, but the registers used in add are swapped. O0 has no problem,
but the problem comes in as soon as I compile with O1.
Code:
#include <stdio.h>
extern unsigned int index;
extern unsigned char arr[100];
int main(int argc, char *argv[])
{
if(arr[index] != 0) printf("\n FATAL....") ;
return 0;
}
I also built the cross compiler for linux and the assembly generated
matches with the one generated by compiler on Cygwin. Could someone
please help me out.
Regards
Manmeet
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Difference in assembly
2004-12-29 11:09 Difference in assembly Manmeet Singh Johar
@ 2004-12-31 7:41 ` Manmeet Singh Johar
0 siblings, 0 replies; 2+ messages in thread
From: Manmeet Singh Johar @ 2004-12-31 7:41 UTC (permalink / raw)
To: gcc-bugs
Has anybody faced with such a problem? Please do help me out.
regards
manmeet
Manmeet Singh Johar wrote:
> Hello,
> I am building cross compilers for SPARC variant for Cygwin and MingW
> hosts. In the process I am faced with a very peculiar problem. For the
> code shown below, though I am getting same assembly instructions in
> same sequence, but the registers used in add are swapped. O0 has no
> problem, but the problem comes in as soon as I compile with O1.
> Code:
> #include <stdio.h>
> extern unsigned int index;
> extern unsigned char arr[100];
> int main(int argc, char *argv[])
> {
> if(arr[index] != 0) printf("\n FATAL....") ;
> return 0;
> }
> I also built the cross compiler for linux and the assembly generated
> matches with the one generated by compiler on Cygwin. Could someone
> please help me out.
> Regards
> Manmeet
>
>
--
Manmeet Singh Johar
Software Engineer
Conexant
(+91-93120-54285)
"Forget yourself and you will not be forgotten."
^ permalink raw reply [flat|nested] 2+ messages in thread
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2004-12-29 11:09 Difference in assembly Manmeet Singh Johar
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