[llvm] r182527 - Simplify logic now that r182490 is in place. No functional change intended.

[Chad Rosier]

Author: mcrosier
Date: Wed May 22 17:36:55 2013
New Revision: 182527

URL: http://llvm.org/viewvc/llvm-project?rev=182527&view=rev
Log:
Simplify logic now that r182490 is in place.  No functional change intended.

Modified:
    llvm/trunk/lib/CodeGen/LiveIntervalAnalysis.cpp

Modified: llvm/trunk/lib/CodeGen/LiveIntervalAnalysis.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/LiveIntervalAnalysis.cpp?rev=182527&r1=182526&r2=182527&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/LiveIntervalAnalysis.cpp (original)
+++ llvm/trunk/lib/CodeGen/LiveIntervalAnalysis.cpp Wed May 22 17:36:55 2013
@@ -229,10 +229,8 @@ void LiveIntervals::computeRegUnitInterv
   // idempotent. It is very rare for a register unit to have multiple roots, so
   // uniquing super-registers is probably not worthwhile.
   for (MCRegUnitRootIterator Roots(Unit, TRI); Roots.isValid(); ++Roots) {
-    unsigned Root = *Roots;
-    if (!MRI->reg_empty(Root))
-      LRCalc->createDeadDefs(LI, Root);
-    for (MCSuperRegIterator Supers(Root, TRI); Supers.isValid(); ++Supers) {
+    for (MCSuperRegIterator Supers(*Roots, TRI, /*IncludeSelf=*/true);
+         Supers.isValid(); ++Supers) {
       if (!MRI->reg_empty(*Supers))
         LRCalc->createDeadDefs(LI, *Supers);
     }
@@ -241,10 +239,8 @@ void LiveIntervals::computeRegUnitInterv
   // Now extend LI to reach all uses.
   // Ignore uses of reserved registers. We only track defs of those.
   for (MCRegUnitRootIterator Roots(Unit, TRI); Roots.isValid(); ++Roots) {
-    unsigned Root = *Roots;
-    if (!MRI->isReserved(Root) && !MRI->reg_empty(Root))
-      LRCalc->extendToUses(LI, Root);
-    for (MCSuperRegIterator Supers(Root, TRI); Supers.isValid(); ++Supers) {
+    for (MCSuperRegIterator Supers(*Roots, TRI, /*IncludeSelf=*/true);
+         Supers.isValid(); ++Supers) {
       unsigned Reg = *Supers;
       if (!MRI->isReserved(Reg) && !MRI->reg_empty(Reg))
         LRCalc->extendToUses(LI, Reg);