Displaying 2 results from an estimated 2 matches for "ty_is_i16".
2013 Aug 15
1
[LLVMdev] Clarification between <type> and <ty> for alloca instruction
Hi,
This is quite a simple question so hopefully it's easy to answer.
I was looking at the documentation for the alloca instruction (
http://llvm.org/docs/LangRef.html#alloca-instruction ) and something is
unclear to me. The given syntax is...
<result> = alloca <type>[, <ty> <NumElements>][, align <alignment>]
; yields {type*}:result
And the documentation
2013 Aug 15
2
[LLVMdev] Clarification between <type> and <ty> for alloca instruction
...refers to the type of
NumElements.
> It doesn't really affect the output at all. If NumElements doesn't
> overflow <ty> then the semantics don't depend on it at all.
>
> In C-like code it's sort of the difference between these two
> functions:
>
> void ty_is_i16(unsigned short NumElements) { int arr[NumElements];
> use_array(arr); }
>
> void ty_is_i32(unsigned int NumElements) { int arr[NumElements];
> use_array(arr); }
>
> you might compile them to
>
> define void @ty_is_i16(i16 %NumElements) { %arr = alloca i32, i16
> %Num...