riscv: also enable stats and stats_client in libclang_rt

[pkubaj]

Summary

I found they build after enabling COMPILER_RT in devel/llvm-devel.

Test Plan

make buildworld with riscv64 and riscv64sf

[pkubaj]

• powerpc: implement __clear_cache

[pkubaj]

Remove powerpc-related change.

[dim]

Sure. Were you able to test them? (I assume they compile, but not sure if it's easy to do a check if the stats libs work... :)

[pkubaj]

• powerpc: add GENERIC64LE-NODEBUG config and improve GENERIC64-NODEBUG

[pkubaj]

Backing out wrong diff.

[pkubaj]

Also add includes directory, I didn't notice it earlier.

[pkubaj]

Backout unrelated change.

[pkubaj]

How do I test it? I only tested build-time. I'm trying to compare to amd64, but even there I'm having issues. According to https://llvm.org/docs/ProgrammersManual.html#the-statistic-class-stats-option, I need Statistic.h, but this is not installed. And when using llvm13 from ports:

clang++13 -S -emit-llvm -I /usr/local/llvm13/include/ -I /usr/include/c++/v1 helloworld.c
llc helloworld.ll
clang++13 helloworld.s

ld: error: undefined symbol: llvm::TrackingStatistic::RegisterStatistic()
>>> referenced by helloworld.c
>>>               /tmp/helloworld-19b012.o:(llvm::TrackingStatistic::init())
clang-13: error: linker command failed with exit code 1 (use -v to see invocation)

The file I use for testing is:

#include <iostream>
#include <llvm/ADT/Statistic.h>

#define DEBUG_TYPE "mypassname"   // This goes after any #includes.
STATISTIC(NumXForms, "The # of times I did stuff");

int main()
{
    std::cout << "Hello, World!" << std::endl;
    ++NumXForms;   // I did stuff!

    return 0;
}

If I just try to use opt on ll file:

opt13 -stats -mypassname < helloworld.ll > /dev/null

I end up with:

opt: Unknown command line argument '-mypassname'.  Try: '/usr/local/llvm13/bin/opt --help'
opt: Did you mean '--metarenamer'?

[pkubaj]

This comment was removed by pkubaj.

[pkubaj]

Sigh, another arc confusion.

[pkubaj]

Ping.
In https://reviews.freebsd.org/D34735#793322 I showed how I tried to test it. Are stats broken on FreeBSD after all?