Why do we need an APInt?
Removed commented out code.
Where did FNSTSW16r come from? I deleted that recently.
STMXCSR/LDMXCSR aren't used.
I have no idea why FLT_ROUNDS calls TFI.getStackAlignment() to get the second parameter here. It should just be 4.
Modified patch according to reviewer's notes
Changed here but implementation of LowerFLT_ROUNDS_ was not changed.
FNSTSW16r was removed at D73863, but FNSTCW16m stayed