[PATCH] D50725: [SystemZ] Replace subreg_r with subreg_h

[Krzysztof Parzyszek via Phabricator via llvm-commits]

kparzysz added a comment.

Running tblgen with -debug shows

  RC FP64Bit Units:
   F0S F1S F2S F3S F4S F5S F6S F7S F8S F9S F10S F11S F12S F13S F14S F15S
  [...]
  RC VF128Bit Units: 
   F0S F1S F2S F3S F4S F5S F6S F7S F8S F9S F10S F11S F12S F13S F14S F15S
  [...]
  RC FP128Bit Units:
   F0S F1S F2S F3S F4S F5S F6S F7S F8S F9S F10S F11S F12S F13S F14S F15S

These are unit sets for the entire class, but the fact that they are identical is a sign that the individual registers share units with their subregisters.


Repository:
  rL LLVM

https://reviews.llvm.org/D50725