commit 4fcfcf498436533ea9bc59404d10751bc76cfd2c
author Jakob Stoklund Olesen <stoklund@2pi.dk> Thu Jul 14 00:58:38 2011 +0000
committer Jakob Stoklund Olesen <stoklund@2pi.dk> Thu Jul 14 00:58:38 2011 +0000
tree 84f08aa3feb20f087d8bbca14ad08da6bc9bb6dc
parent 6a9feaac935c9345f825b272cf3225248e282f3f

Revert r135121 which broke a gcc-4.2 builder.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135122 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/InterferenceCache.cpp

diff --git a/lib/CodeGen/InterferenceCache.cpp b/lib/CodeGen/InterferenceCache.cpp
index a09bb39..b1014a9 100644
--- a/lib/CodeGen/InterferenceCache.cpp
+++ b/lib/CodeGen/InterferenceCache.cpp
@@ -14,7 +14,6 @@
 #define DEBUG_TYPE "regalloc"
 #include "InterferenceCache.h"
 #include "llvm/Target/TargetRegisterInfo.h"
-#include "llvm/Support/ErrorHandling.h"
 
 using namespace llvm;
 
@@ -41,18 +40,9 @@
   E = RoundRobin;
   if (++RoundRobin == CacheEntries)
     RoundRobin = 0;
-  for (unsigned i = 0; i != CacheEntries; ++i) {
-    // Skip entries that are in use.
-    if (Entries[E].hasRefs()) {
-      if (++E == CacheEntries)
-        E = 0;
-      continue;
-    }
-    Entries[E].reset(PhysReg, LIUArray, TRI, MF);
-    PhysRegEntries[PhysReg] = E;
-    return &Entries[E];
-  }
-  llvm_unreachable("Ran out of interference cache entries.");
+  Entries[E].reset(PhysReg, LIUArray, TRI, MF);
+  PhysRegEntries[PhysReg] = E;
+  return &Entries[E];
 }
 
 /// revalidate - LIU contents have changed, update tags.
@@ -69,7 +59,6 @@
                                      LiveIntervalUnion *LIUArray,
                                      const TargetRegisterInfo *TRI,
                                      const MachineFunction *MF) {
-  assert(!hasRefs() && "Cannot reset cache entry with references");
   // LIU's changed, invalidate cache.
   ++Tag;
   PhysReg = physReg;