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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-09-27 21:05:59 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-09-27 21:05:59 +0000 |
| commit | 4976d0df41ee263bcfc429615eacd348eb1b07d2 (patch) | |
| tree | 0bc05f4845bf3c62eacdc89818ada77b2b33786c /llvm/lib/CodeGen/LiveInterval.cpp | |
| parent | 2885a7088d0a66c2446e34e731560af9277d689d (diff) | |
| download | bcm5719-llvm-4976d0df41ee263bcfc429615eacd348eb1b07d2.tar.gz bcm5719-llvm-4976d0df41ee263bcfc429615eacd348eb1b07d2.zip | |
Don't dereference begin() on an empty vector.
The fix is obvious and the only test case I have is horrible, so I am
not including it. The problem shows up when self-hosting clang on i386
with -new-coalescer enabled.
llvm-svn: 164793
Diffstat (limited to 'llvm/lib/CodeGen/LiveInterval.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/LiveInterval.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/LiveInterval.cpp b/llvm/lib/CodeGen/LiveInterval.cpp index f4ebcd6fa45..c3bf2d234c0 100644 --- a/llvm/lib/CodeGen/LiveInterval.cpp +++ b/llvm/lib/CodeGen/LiveInterval.cpp @@ -427,7 +427,7 @@ void LiveInterval::join(LiveInterval &Other, // If we have to apply a mapping to our base interval assignment, rewrite it // now. - if (MustMapCurValNos) { + if (MustMapCurValNos && !empty()) { // Map the first live range. iterator OutIt = begin(); |
