Also compute MBB live-in lists in the new rewriter pass.

[oota-llvm.git] / lib / CodeGen / RegAllocPBQP.cpp

diff --git a/lib/CodeGen/RegAllocPBQP.cpp b/lib/CodeGen/RegAllocPBQP.cpp
index 946d70e32fb863901fb778077cdcba7bdc14b071..2c58d7dda20855025f8696c44587aa24ce958b3b 100644 (file)
--- a/lib/CodeGen/RegAllocPBQP.cpp
+++ b/lib/CodeGen/RegAllocPBQP.cpp
@@ -594,51 +594,6 @@ void RegAllocPBQP::finalizeAlloc() const {
 
     vrm->assignVirt2Phys(li->reg, physReg);
   }
-
-  // Finally iterate over the basic blocks to compute and set the live-in sets.
-  SmallVector<MachineBasicBlock*, 8> liveInMBBs;
-  MachineBasicBlock *entryMBB = &*mf->begin();
-
-  for (LIIterator liItr = lis->begin(), liEnd = lis->end();
-       liItr != liEnd; ++liItr) {
-
-    const LiveInterval *li = liItr->second;
-    unsigned reg = 0;
-
-    // Get the physical register for this interval
-    if (TargetRegisterInfo::isPhysicalRegister(li->reg)) {
-      reg = li->reg;
-    } else if (vrm->isAssignedReg(li->reg)) {
-      reg = vrm->getPhys(li->reg);
-    } else {
-      // Ranges which are assigned a stack slot only are ignored.
-      continue;
-    }
-
-    if (reg == 0) {
-      // Filter out zero regs - they're for intervals that were spilled.
-      continue;
-    }
-
-    // Iterate over the ranges of the current interval...
-    for (LRIterator lrItr = li->begin(), lrEnd = li->end();
-         lrItr != lrEnd; ++lrItr) {
-
-      // Find the set of basic blocks which this range is live into...
-      if (lis->findLiveInMBBs(lrItr->start, lrItr->end,  liveInMBBs)) {
-        // And add the physreg for this interval to their live-in sets.
-        for (unsigned i = 0; i != liveInMBBs.size(); ++i) {
-          if (liveInMBBs[i] != entryMBB) {
-            if (!liveInMBBs[i]->isLiveIn(reg)) {
-              liveInMBBs[i]->addLiveIn(reg);
-            }
-          }
-        }
-        liveInMBBs.clear();
-      }
-    }
-  }
-
 }
 
 bool RegAllocPBQP::runOnMachineFunction(MachineFunction &MF) {