[llvm] RuntimeLibcalls: Stop opting out of exp10 (PR #148604)

[Matt Arsenault via llvm-commits]

arsenm wrote:

Here is the status quo: https://godbolt.org/z/PPzn9zMs8

The f32 and f64 cases hard error. The f128 case incorrectly codegens to exp10l, and the x86_fp80 case codegens to a function which does not exist. This makes all 4 cases consistently error 


https://github.com/llvm/llvm-project/pull/148604