On 09/12/2023 13:35, Adriaan van Os via fpc-devel wrote:
Jonas Maebe via fpc-devel wrote:
So if/when we would get FPC equivalents of such directives, I could
translate those to LLVM IR as well.
Then I suggest the following (and I can prepare a patch to the code and
docs if it were to be accepted)
$vectorize ON}
{$vectorize OFF}
{$vectorize WIDTH=VALUE}
{$vectorize TYPE=FIXED}
{$vectorize TYPE=SCALABLE}
{$vectorize PREDICATE=ON}
{$vectorize PREDICATE=OFF}
For a description, see
<https://llvm.org/docs/Vectorizers.html#command-line-flags>. And
{$unroll ON}
{$unroll OFF}
{$unroll FULL}
{$unroll COUNT=VALUE}
For a description, see
<https://clang.llvm.org/docs/LanguageExtensions.html#extensions-for-loop-hint-optimizations>.
I'd rather not introduce directives that are specific to clang, and
especially none only apply to the next loop. We don't have a single
directive yet that works like this.
Maybe attributes would be more appropriate, although I don't think
Delphi (or FPC) currently supports attributes for statements.
Also, I suggest
-Cl<xxx> Pass xxx to Clang as pragma on the command-line.
You can already pass command line options to clang using the generic -ao
command line parameter.
Jonas
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