From 0d4fea786670473b53d285be378e619399e03488 Mon Sep 17 00:00:00 2001 From: Jakob Stoklund Olesen Date: Wed, 14 Sep 2011 17:34:37 +0000 Subject: Ignore the cloning of unknown registers. THe LRE_DidCloneVirtReg callback may be called with vitual registers that RAGreedy doesn't even know about yet. In that case, there are no data structures to update. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139702 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/RegAllocGreedy.cpp | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'lib/CodeGen/RegAllocGreedy.cpp') diff --git a/lib/CodeGen/RegAllocGreedy.cpp b/lib/CodeGen/RegAllocGreedy.cpp index 08767a0..f54a2c8 100644 --- a/lib/CodeGen/RegAllocGreedy.cpp +++ b/lib/CodeGen/RegAllocGreedy.cpp @@ -377,6 +377,10 @@ void RAGreedy::LRE_WillShrinkVirtReg(unsigned VirtReg) { } void RAGreedy::LRE_DidCloneVirtReg(unsigned New, unsigned Old) { + // Cloning a register we haven't even heard about yet? Just ignore it. + if (!ExtraRegInfo.inBounds(Old)) + return; + // LRE may clone a virtual register because dead code elimination causes it to // be split into connected components. The new components are much smaller // than the original, so they should get a new chance at being assigned. -- cgit v1.1