[clang] [llvm] [RISCV][MC] Add support for Q extension (PR #139369)

[Craig Topper via llvm-commits]

================
@@ -766,6 +776,9 @@ void RISCVInstrInfo::loadRegFromStackSlot(
   } else if (RISCV::FPR64RegClass.hasSubClassEq(RC)) {
     Opcode = RISCV::FLD;
     IsScalableVector = false;
+  } else if (RISCV::FPR128RegClass.hasSubClassEq(RC)) {
----------------
topperc wrote:

This isn't an MC layer change and can't be tested.

https://github.com/llvm/llvm-project/pull/139369