llvm-project

821d2825 - RuntimeLibcalls: Remove incorrect sincospi from most targets (#166982)

RuntimeLibcalls: Remove incorrect sincospi from most targets (#166982) sincospi/sincospif/sincospil does not appear to exist on common targets. Darwin targets have __sincospi and __sincospif, so define and use those implementations. I have no idea what version added those calls, so I'm just guessing it's the same conditions as __sincos_stret. Most of this patch is working to preserve codegen when a vector library is explicitly enabled. This only covers sleef and armpl, as those are the only cases tested. The multiple result libcalls have an aberrant process where the legalizer looks for the scalar type's libcall in RuntimeLibcalls, and then cross references TargetLibraryInfo to find a matching vector call. This was unworkable in the sincospi case, since the common case is there is no scalar call available. To preserve codegen if the call is available, first try to match a libcall with the vector type before falling back on the old scalar search. Eventually all of this logic should be contained in RuntimeLibcalls, without the link to TargetLibraryInfo. In principle we should perform the same legalization logic as for an ordinary operation, trying to find a matching subvector type with a libcall.