Prevented reg0 from being added to MBB live-in set, which was causing issues

for PostRAScheduler.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71991 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/RegAllocPBQP.cpp b/lib/CodeGen/RegAllocPBQP.cpp
index 9b2c92c13e505dcac8cb90180abceb4d78adf043..6bad2db44d1260c5c74b92c7a58e6fb5c53d3866 100644 (file)
--- a/lib/CodeGen/RegAllocPBQP.cpp
+++ b/lib/CodeGen/RegAllocPBQP.cpp
@@ -765,6 +765,11 @@ void PBQPRegAlloc::finalizeAlloc() const {
       continue;
     }
 
+    // Ignore unallocated vregs:
+    if (reg == 0) {
+      continue;
+    }
+
     // Iterate over the ranges of the current interval...
     for (LRIterator lrItr = li->begin(), lrEnd = li->end();
          lrItr != lrEnd; ++lrItr) {