Revert "[RegAlloc] Make sure live-ranges reflect the state of the IR when removing them"

This temporarily reverts commit 463fa38 (r311401).

See https://bugs.llvm.org/show_bug.cgi?id=34502

llvm-svn: 312708

1 files changed, 1 insertions, 4 deletions

diff --git a/llvm/lib/CodeGen/RegAllocGreedy.cpp b/llvm/lib/CodeGen/RegAllocGreedy.cpp
index 6f0b7a936c5..020e81eca2d 100644
--- a/llvm/lib/CodeGen/RegAllocGreedy.cpp
+++ b/llvm/lib/CodeGen/RegAllocGreedy.cpp
@@ -546,17 +546,14 @@ void RAGreedy::getAnalysisUsage(AnalysisUsage &AU) const {
 //===----------------------------------------------------------------------===//
 
 bool RAGreedy::LRE_CanEraseVirtReg(unsigned VirtReg) {
-  LiveInterval &LI = LIS->getInterval(VirtReg);
   if (VRM->hasPhys(VirtReg)) {
+    LiveInterval &LI = LIS->getInterval(VirtReg);
     Matrix->unassign(LI);
     aboutToRemoveInterval(LI);
     return true;
   }
   // Unassigned virtreg is probably in the priority queue.
   // RegAllocBase will erase it after dequeueing.
-  // Nonetheless, clear the live-range so that the debug
-  // dump will show the right state for that VirtReg.
-  LI.clear();
   return false;
 }