commit 2c325dc907bc84702cc76e64dd25bb1384143fed
author Jakob Stoklund Olesen <stoklund@2pi.dk> Tue Aug 31 19:54:25 2010 +0000
committer Jakob Stoklund Olesen <stoklund@2pi.dk> Tue Aug 31 19:54:25 2010 +0000
tree 32d652941e002144800537104b87232bbfe3f0d1
parent 529f248eb4a107946e7fa1013370f514c7d7dcea

Ignore unallocatable registers in RegAllocFast.

llvm-svn: 112632

llvm/lib/CodeGen/RegAllocFast.cpp

diff --git a/llvm/lib/CodeGen/RegAllocFast.cpp b/llvm/lib/CodeGen/RegAllocFast.cpp
index 8f6496d..2376868 100644
--- a/llvm/lib/CodeGen/RegAllocFast.cpp
+++ b/llvm/lib/CodeGen/RegAllocFast.cpp
@@ -736,7 +736,8 @@
   // 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;