From: Jakob Stoklund Olesen <stoklund@2pi.dk>
Date: Tue, 31 Aug 2010 19:54:25 +0000 (+0000)
Subject: Ignore unallocatable registers in RegAllocFast.
X-Git-Tag: llvmorg-2.8.0-rc0~373
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=2c325dc907bc84702cc76e64dd25bb1384143fed;p=platform%2Fupstream%2Fllvm.git

Ignore unallocatable registers in RegAllocFast.

llvm-svn: 112632
---

diff --git a/llvm/lib/CodeGen/RegAllocFast.cpp b/llvm/lib/CodeGen/RegAllocFast.cpp
index 8f6496dcac79..237686859fa9 100644
--- a/llvm/lib/CodeGen/RegAllocFast.cpp
+++ b/llvm/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;