Remember to update VirtRegLastUse when spilling without killing before a call.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104074 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/RegAllocLocal.cpp b/lib/CodeGen/RegAllocLocal.cpp
index 8106a36..321ae12 100644
--- a/lib/CodeGen/RegAllocLocal.cpp
+++ b/lib/CodeGen/RegAllocLocal.cpp
@@ -301,6 +301,16 @@
DEBUG(dbgs() << " to stack slot #" << FrameIndex);
TII->storeRegToStackSlot(MBB, I, PhysReg, isKill, FrameIndex, RC, TRI);
++NumStores; // Update statistics
+
+ // Mark the spill instruction as last use if we're not killing the register.
+ if (!isKill) {
+ MachineInstr *Spill = llvm::prior(I);
+ int OpNum = Spill->findRegisterUseOperandIdx(PhysReg);
+ if (OpNum < 0)
+ getVirtRegLastUse(VirtReg) = std::make_pair((MachineInstr*)0, 0);
+ else
+ getVirtRegLastUse(VirtReg) = std::make_pair(Spill, OpNum);
+ }
}
/// spillVirtReg - This method spills the value specified by PhysReg into the