Hi,
> I'm still developping a new private target backend (gcc4.5.2) and I noticed
> something strange in the assembler generated for conditionnal jump.
>
>
> The compiled C code source is :
>
> void funct (int c) {
> int a;
> a = 7;
> if (c < 0)
> a = 4;
> return a;
> }
>
BELBACHIR Selim schrieb:
Hi,
I'm still developping a new private target backend (gcc4.5.2) and I
noticed something strange in the assembler generated for conditionnal
jump.
Maybe unfortunate defnition of branch costs or rtx costs?
How can I tell GCC to perform the best conditionnal jump by s
On Thu, 2012-01-05 at 14:49 +0100, BELBACHIR Selim wrote:
> Hi,
>
> I'm still developping a new private target backend (gcc4.5.2) and I
> noticed something strange in the assembler generated for conditionnal
> jump.
>
>
I'm not sure whether it can help you in this particular case, but you
might
BELBACHIR Selim writes:
> How can I tell GCC to perform the best conditionnal jump by sometimes
> reversing the comparison ?
It should work when compiling with -O2. I can't think of anything you
are doing wrong or anything special you should need to do. I think you
will need to debug this. S
Hi,
I'm still developping a new private target backend (gcc4.5.2) and I noticed
something strange in the assembler generated for conditionnal jump.
The compiled C code source is :
void funct (int c) {
int a;
a = 7;
if (c < 0)
a = 4;
return a;
}
The assembler generated i
