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-rw-r--r--lib/CodeGen/RegAllocFast.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/CodeGen/RegAllocFast.cpp b/lib/CodeGen/RegAllocFast.cpp
index 8f6496dcac..237686859f 100644
--- a/lib/CodeGen/RegAllocFast.cpp
+++ b/lib/CodeGen/RegAllocFast.cpp
@@ -736,7 +736,8 @@ void RAFast::AllocateBasicBlock() {
// Add live-in registers as live.
for (MachineBasicBlock::livein_iterator I = MBB->livein_begin(),
E = MBB->livein_end(); I != E; ++I)
- definePhysReg(MII, *I, regReserved);
+ if (Allocatable.test(*I))
+ definePhysReg(MII, *I, regReserved);
SmallVector<unsigned, 8> VirtDead;
SmallVector<MachineInstr*, 32> Coalesced;