llvm-project

46ed6201 - [AArch64][GlobalISel] Remove fallbacks for fpcvt intrinsics with 16-bit operands (#179693)

[AArch64][GlobalISel] Remove fallbacks for fpcvt intrinsics with 16-bit operands (#179693) Previously, GlobalISel failed to lower neon fpcvt intrinsics, as RegBankSelect was not keeping the result on a fpr. An additional fix is needed for the fpcvtz intrinsics, as these are the "default" floating point convert intrinsics. As a result, Instruction Selection has patterns mapping the FPCVTZ intrinsic to the architecture-agnostic G_FP_TO*I_SAT node. This also provides the opportunity for more optimisations to be made to the code before Selection.