call @PLT Performance
patric.dexheimer at gmail.com
Wed Jan 16 16:04:43 UTC 2019
On Wednesday, 16 January 2019 at 14:19:27 UTC, Johan Engelen
> On Wednesday, 16 January 2019 at 13:03:59 UTC, SrMordred wrote:
>> Compiler noob here:
>> auto a = popcnt(bitset);
>> auto b = bsf(bitset);
>> generate this:
>> call pure nothrow @nogc @safe int
>> call pure nothrow @nogc @safe int core.bitop.bsf(uint)@PLT
>> Why not generate the bsf/popcnt instruction?
>> Aren't this call's slower?
> Yeah this is a known issue: LDC does not cross-module inline.
> You can enable that by passing the
> "-enable-cross-module-inlining" compile flag.
> It's a long standing issue, but became a little less urgent
> because of LTO (`-flto=...`).
Oh Nice, thanks!
More information about the digitalmars-d-ldc