Fix comment in HexagonPacketizer::runOnMachineFunction

[chenwj]

Summary

According to the context, should be "Find first ...", not "First first".

[chenwj]

@kparzysz please help me commit it as I have no commit access, thanks.

[kparzysz]

In D33439#762699, @chenwj wrote:

[...] as I have no commit access, thanks.

Maybe it's time you get it? :)

lib/Target/Hexagon/HexagonVLIWPacketizer.cpp

while (MI != End) {
       MI = NextI;
     }
   }
 
   // Loop over all of the basic blocks.
   for (auto &MB : MF) {
     auto Begin = MB.begin(), End = MB.end();
     while (Begin != End) {
-      // First the first non-boundary starting from the end of the last
+      // Find the first non-boundary starting from the end of the last
       // scheduling region.
       MachineBasicBlock::iterator RB = Begin;
       while (RB != End && HII->isSchedulingBoundary(*RB, &MB, MF))
         ++RB;
-      // First the first boundary starting from the beginning of the new
+      // Find the first boundary starting from the beginning of the new
       // region.
       MachineBasicBlock::iterator RE = RB;
       while (RE != End && !HII->isSchedulingBoundary(*RE, &MB, MF))
         ++RE;
       // Add the scheduling boundary if it's not block end.
       if (RE != End)
         ++RE;
       // If RB == End, then RE == End.