[llvm] [llvm][CodeGen] update live intervals for ModuloScheduleExpanderMVE (PR #132677)

[Yuta Mukai via llvm-commits]

================
@@ -2213,6 +2215,14 @@ void ModuloScheduleExpanderMVE::insertCondBranch(MachineBasicBlock &MBB,
   }
 }
 
+/// Some registers are generated during the kernel expansion. We calculate the
+/// live intervals of these registers after the expansion.
+void ModuloScheduleExpanderMVE::calculateIntervals() {
+  for (Register Reg : NewVRegs)
+    LIS.createAndComputeVirtRegInterval(Reg);
----------------
ytmukai wrote:

Thanks for the fix!
I am not familiar with the correction method for LIS, but from the code below, it seems that intervals are automatically calculated when necessary for registers that have not been computed. Therefore, it might not be necessary to calculate them here.

https://github.com/llvm/llvm-project/blob/449e3fad62455653beaa77f328f804a2027096f9/llvm/include/llvm/CodeGen/LiveIntervals.h#L133-L138

https://github.com/llvm/llvm-project/pull/132677