Displaying 2 results from an estimated 2 matches for "__myaddrspace".
2020 May 27
2
Custom Instruction Cost Model to LLVM RISC-V Backend
Thanks a lot Henrik!
I figured following would mark a pointer to a specific address space:
#define __myaddrspace __attribute__((address_space(1)))
__myaddrspace int* data;
And, I was able to verify loads being annotated to be from addrspace 1 in
the generated IR. Would this work for automatic variables as well?
In regards to using this in the backend, do I have to just modify the
source, or is it possible...
2020 May 26
2
Custom Instruction Cost Model to LLVM RISC-V Backend
Hi,
I’m working on a RISC-V architecture that has instruction costs different
from those in the default cost model. Is there an out-of-source way to
provide llc with custom cost model? Or, does this need a change in LLVM
backend?
Also, the cost model is not totally static. For example, loads from
0x1000-0x1ffc take 1 cycle, whereas loads from address > 0x80000000, take
10-100 cycles. Is it