Emission of store_multiple and load_multiple patterns

[noeljohn]

Ian Lance Taylor-3 wrote:
> 
> noeljohn <noel.daniel@gmx.com> writes:
> 
>>         I am working on a new risc machine. I have defined the
>> "store_multiple" and "load_multiple" pattern and the system builds fine.
>> But
>> when I compile the C program for a declared integer array, the
>> "store_multiple" and "load_multiple" patterns are not getting emitted.
>> Instead simple load and store patterns are emitted multiple times. As per
>> actual working store_multiple and load_multiple patters need to get
>> emitted.
> 
> What do your store_multiple and load_multiple insns look like?
> 
> E.g., if they only work for consecutive registers, then gcc can only
> match them after register allocation, but there is no appropriate
> optimization pass to do so.  In that case you are going to have write
> peepholes for them, and you're going to have to generate them
> explicitly in your backend's prologue and epilogue generation.
> 
> 
> Ian
> 
> 


Thank you for replying.
According to my understanding, it works for consecutive registers as I am
just declaring an array in my test case. To be specific, how do I get
"rodata" section in assembly generated that contains only the data(integers)
in the array declared,, because when I compile with other already build
processors, it creates this rodata section and then using a single
instruction stores all the elements of array in memory. 

noeljohn
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