From: Jakob Stoklund Olesen <stoklund@2pi.dk>
Date: Sat, 14 Jul 2012 18:45:35 +0000 (+0000)
Subject: Account for early-clobber reload instructions.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=27982e110817e373ed85064eb844bbaec0fe6771;p=oota-llvm.git

Account for early-clobber reload instructions.

No test case, there are no in-tree targets that require this.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160219 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/InlineSpiller.cpp b/lib/CodeGen/InlineSpiller.cpp
index 4c7f5d8c88c..07e37af57f3 100644
--- a/lib/CodeGen/InlineSpiller.cpp
+++ b/lib/CodeGen/InlineSpiller.cpp
@@ -1081,6 +1081,10 @@ void InlineSpiller::insertReload(LiveInterval &NewLI,
                            MRI.getRegClass(NewLI.reg), &TRI);
   --MI; // Point to load instruction.
   SlotIndex LoadIdx = LIS.InsertMachineInstrInMaps(MI).getRegSlot();
+  // Some (out-of-tree) targets have EC reload instructions.
+  if (MachineOperand *MO = MI->findRegisterDefOperand(NewLI.reg))
+    if (MO->isEarlyClobber())
+      LoadIdx = LoadIdx.getRegSlot(true);
   DEBUG(dbgs() << "\treload:  " << LoadIdx << '\t' << *MI);
   VNInfo *LoadVNI = NewLI.getNextValue(LoadIdx, LIS.getVNInfoAllocator());
   NewLI.addRange(LiveRange(LoadIdx, Idx, LoadVNI));