[Mono-devel-list] fixed statement

[Eric Durand Tremblay]

Hi all, thank you for your response.

I have an other related question.
mcs output some "conv.i".  I can run the same IL without any "conv.i" 
and it work perfectly. 

I know "conv.i" is used to convert in "natural int".  Is it due to the 
fact that in some platform, pointers can not be added ( or any other 
arithmetic operation) directly?

So, is it better to keep them (in CIL Regex, I don't talk about mcs).

Thanks.

Eric Durand Tremblay.

Eric Durand Tremblay a écrit :

> Can somebody tell me how mono handle fixed statement.
>
> For something like this :
>
> string bar = "something";
>
> fixed ( char * foo = bar) {
>    foo[0] = 'c';
> }
>
> MCS output :
>
>        IL_0000:  ldstr "bar"
>        IL_0005:  stloc.1
>        IL_0006:  ldloc.1
>        IL_0007:  stloc.2
>        IL_0008:  ldloc.2
>        IL_0009:  conv.i
>        IL_000a:  call int32 class 
> [mscorlib]'System.Runtime.CompilerServices.RuntimeHelpers'::'get_OffsetToStringData'() 
>
>        IL_000f:  add
>        IL_0010:  stloc.0
>        IL_0011:  ldloc.0
>        IL_0012:  conv.i
>        IL_0013:  ldc.i4.0
>        IL_0014:  ldc.i4.2
>        IL_0015:  mul
>        IL_0016:  conv.i
>        IL_0017:  add
>        IL_0018:  ldc.i4.s 0x63
>        IL_001a:  stind.i2
>        IL_001b:  ldnull
>        IL_001c:  stloc.2
>        IL_001d:  ret
>
> There is nothing in this that "lock" the garbage collector
> (msdn define lock as: Prevents relocation of a variable by the garbage 
> collector.)
>
> Thanks
>
> Eric Durand-Tremblay
>
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