diff options
| -rw-r--r-- | lib/CodeGen/RegAllocGreedy.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/CodeGen/RegAllocGreedy.cpp b/lib/CodeGen/RegAllocGreedy.cpp index 08767a0d05..f54a2c85d1 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. |