llvm-project

3d69bbc3 - Allow MAY(R)? to accept the high components of register pairs (#98606)

Allow MAY(R)? to accept the high components of register pairs (#98606) The HFP instructions `MAY` and `MAYR`, unlike any other floating point instructions, allow the specification of a 128bit register pair by either the lower-numbered or the higher-numbered component register. In order to support this, but change as little about codegen as possible, the existing `MAY(R)?` definition is made `CodeGenOnly`, while a copy is provided for the assembler and disassembler, which simply accepts a 64bit floating point register in place of the 128bit one. This copy is stripped of its pattern to prevent codegen from using it. The corresponding assembly tests that checked the register specification rule that this commit removes from `MAY(R)?` have also been removed.