[𝘀𝗽𝗿] changes introduced through rebase

Created using spr 1.3.5

[skip ci]

Author: koachan

llvm/lib/Target/Sparc/SparcInstrVIS.td

@@ -299,6 +299,7 @@ def : Pat<(i64 (mulhu i64:$lhs, i64:$rhs)), (UMULXHI $lhs, $rhs)>;
 // Signed "MULXHI".
 // Based on the formula presented in OSA2011 §7.140, but with bitops to select
 // the values to be added.
+// TODO: This expansion should probably be moved to DAG legalization phase.
 def : Pat<(i64 (mulhs i64:$lhs, i64:$rhs)),
       (SUBrr (UMULXHI $lhs, $rhs),
              (ADDrr (ANDrr (SRAXri $lhs, 63), $rhs),