[PATCH] middle-end: Skip initialization of opaque type register variables [PR103127]

Peter Bergner bergner@linux.ibm.com
Tue Nov 30 20:07:08 GMT 2021


On 11/30/21 1:50 PM, Qing Zhao via Gcc-patches wrote:
>> void
>> bar (__vector_pair *dst, __vector_pair *src)
>> {
>>  __vector_pair pair;
>>  pair = *src;
>>  ...
>> }
> 
> However, even with the above, the memory pointed by “src” still need to
> be initialized somewhere. How to provide the initial value to the variable
> in the beginning for __vector_pair type?

Well no initialization is required here in this function.  Isn't that what
matters here?  When generating code for bar(), we assume that src already
points to initialized memory.

As for what src points to, that could be initialized how any other memory/
array could be initialized, so either a static array, read in some data
from a file into an array, compute the array values in a loop, etc. etc.

Peter



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