Re: Tonights Tradeoff - Background Execution Buffers

On Wed, 9 Oct 2024 10:44:08 +0000, Robert Finch wrote:

>
Been thinking some about the carry and overflow and what to do about
register spills and reloads during expression processing. My thought was
that on the machine with 256 registers, simply allocate a ridiculous
number of registers for expression processing, for example 25 or even
50. Then if the expression is too complex, have the compiler spit out an
error message to the programmer to simplify the expression. Remnants of
the ‘expression too complex’ error in BASIC.

Both completely unacceptable, and in your case completely unnecessary.
in 967 subroutines I read out of My 66000 LLVM compile, I only have
3 cases of spill-fill, and that is with only 32 registers with uni-
versal constants.
Of the RISC-V code I read alongside with 32+32 registers, I counted 8.
With those statistics and 256 registers, If you can't get to essentially
0 spill=fill the problem is not with your architecture but with your
compiler.