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On 12/09/11 08:05, BELBACHIR Selim wrote:
> Hi,
>
> I'm still working on a new gcc-4.5.2 backend for a private
> processor. I encountered a strange behavior and I'm unable to find
> what causes this behavior. As an overview, it seems that dse2 pass
> removes insn where it should not (optim -O2, -O3)
>
> Here is the code giving me headachs which returns 0 when it should
> return 0x3F800000 (hex representation of 1.0f) :
>
> void f1(int *ret2) { *ret2 = 2; }
>
> float f2(float par1) { return par1; }
>
> void (*ff)() = f1;
>
> int main() { int x; float af; ff(&x); af = f2(1.0f); return *((int
> *)(&af)); }
>
> When I try to simplify this sample code further, the problem
> disappear even if apparenlty there is no relation between the f2
> call and the ff call...
Is this even valid C code? Aren't you accessing "af" as an int* in
the return statement?
jeff
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