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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-03-07 18:56:16 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-03-07 18:56:16 +0000 |
| commit | a9d5c2715b5e8e0be613d8d31e76c35a5bfff07d (patch) | |
| tree | d53d3f34e24e4bb9932e2faaaefbac7b27377174 /lib/CodeGen/LiveIntervalAnalysis.cpp | |
| parent | 6154f6c9292179fab6346ae8336f2ad790b52028 (diff) | |
| download | llvm-a9d5c2715b5e8e0be613d8d31e76c35a5bfff07d.tar.gz llvm-a9d5c2715b5e8e0be613d8d31e76c35a5bfff07d.tar.bz2 llvm-a9d5c2715b5e8e0be613d8d31e76c35a5bfff07d.tar.xz | |
Handle the special case of registers begin redefined by early-clobber defs.
In this case, the value need to be available at the load index instead of the
normal use index.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127167 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/LiveIntervalAnalysis.cpp')
| -rw-r--r-- | lib/CodeGen/LiveIntervalAnalysis.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp index d326729920..4dda548548 100644 --- a/lib/CodeGen/LiveIntervalAnalysis.cpp +++ b/lib/CodeGen/LiveIntervalAnalysis.cpp @@ -779,6 +779,13 @@ void LiveIntervals::shrinkToUses(LiveInterval *li) { if (VNI->isUnused()) continue; NewLI.addRange(LiveRange(VNI->def, VNI->def.getNextSlot(), VNI)); + + // A use tied to an early-clobber def ends at the load slot and isn't caught + // above. Catch it here instead. This probably only ever happens for inline + // assembly. + if (VNI->def.isUse()) + if (VNInfo *UVNI = li->getVNInfoAt(VNI->def.getLoadIndex())) + WorkList.push_back(std::make_pair(VNI->def.getLoadIndex(), UVNI)); } // Keep track of the PHIs that are in use. |