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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-09-14 17:34:37 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-09-14 17:34:37 +0000 |
| commit | 0d4fea786670473b53d285be378e619399e03488 (patch) | |
| tree | 92e58e154d4b2689c5ccd70c818b11970944f677 /lib/CodeGen/RegAllocGreedy.cpp | |
| parent | 1c0b24f91a5a6f3aeca483e753e7fd27357ecb71 (diff) | |
| download | llvm-0d4fea786670473b53d285be378e619399e03488.tar.gz llvm-0d4fea786670473b53d285be378e619399e03488.tar.bz2 llvm-0d4fea786670473b53d285be378e619399e03488.tar.xz | |
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
Diffstat (limited to 'lib/CodeGen/RegAllocGreedy.cpp')
| -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. |