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author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2013-03-08 18:08:54 +0000 |
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committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2013-03-08 18:08:54 +0000 |
commit | e77b6ceb02b07659092b969fb4a96b56c52375ad (patch) | |
tree | 13cc73ec3b7549a54e3c28e53de627b8660e0c38 /include | |
parent | 7a58099f0a4c9503f400f6b81590a5f6b73d4b97 (diff) | |
download | llvm-e77b6ceb02b07659092b969fb4a96b56c52375ad.tar.gz llvm-e77b6ceb02b07659092b969fb4a96b56c52375ad.tar.bz2 llvm-e77b6ceb02b07659092b969fb4a96b56c52375ad.tar.xz |
Avoid creating a SlotIndex from the end() iterator.
No test case, spotted by inspection.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176705 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include')
-rw-r--r-- | include/llvm/CodeGen/SlotIndexes.h | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/include/llvm/CodeGen/SlotIndexes.h b/include/llvm/CodeGen/SlotIndexes.h index 78fb233e5f..0f85c994a2 100644 --- a/include/llvm/CodeGen/SlotIndexes.h +++ b/include/llvm/CodeGen/SlotIndexes.h @@ -396,12 +396,16 @@ namespace llvm { return index.isValid() ? index.listEntry()->getInstr() : 0; } - /// Returns the next non-null index. - SlotIndex getNextNonNullIndex(SlotIndex index) { - IndexList::iterator itr(index.listEntry()); - ++itr; - while (itr != indexList.end() && itr->getInstr() == 0) { ++itr; } - return SlotIndex(itr, index.getSlot()); + /// Returns the next non-null index, if one exists. + /// Otherwise returns getLastIndex(). + SlotIndex getNextNonNullIndex(SlotIndex Index) { + IndexList::iterator I = Index.listEntry(); + IndexList::iterator E = indexList.end(); + while (I != E) + if ((++I)->getInstr()) + return SlotIndex(I, Index.getSlot()); + // We reached the end of the function. + return getLastIndex(); } /// getIndexBefore - Returns the index of the last indexed instruction |