Post-ra LICM should take care not to hoist an instruction that would clobber a

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

diff --git a/lib/CodeGen/LiveRangeEdit.cpp b/lib/CodeGen/LiveRangeEdit.cpp
index 08ad0855efa372b54779266107ce9395168cfcd0..f9b93d54f6ecfaf8865504a01395afbde87e6588 100644 (file)
--- a/lib/CodeGen/LiveRangeEdit.cpp
+++ b/lib/CodeGen/LiveRangeEdit.cpp
@@ -1,4 +1,4 @@
-//===--- LiveRangeEdit.cpp - Basic tools for editing a register live range --===//
+//===-- LiveRangeEdit.cpp - Basic tools for editing a register live range -===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -94,11 +94,6 @@ bool LiveRangeEdit::allUsesAvailableAt(const MachineInstr *OrigMI,
     // Reserved registers are OK.
     if (MO.isUndef() || !lis.hasInterval(MO.getReg()))
       continue;
-    // We cannot depend on virtual registers in uselessRegs_.
-    if (uselessRegs_)
-      for (unsigned ui = 0, ue = uselessRegs_->size(); ui != ue; ++ui)
-        if ((*uselessRegs_)[ui]->reg == MO.getReg())
-          return false;
 
     LiveInterval &li = lis.getInterval(MO.getReg());
     const VNInfo *OVNI = li.getVNInfoAt(OrigIdx);