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| author | Krzysztof Parzyszek <kparzysz@codeaurora.org> | 2016-04-28 15:09:19 +0000 |
|---|---|---|
| committer | Krzysztof Parzyszek <kparzysz@codeaurora.org> | 2016-04-28 15:09:19 +0000 |
| commit | efd72857a341d62a344dbeaf8baae56454ea4437 (patch) | |
| tree | 0e816c638243af3c631f7f9085836d30a3f82697 /llvm/lib | |
| parent | 354fac2a69574ac668c3f7d56ca22f7c9aa91344 (diff) | |
| download | bcm5719-llvm-efd72857a341d62a344dbeaf8baae56454ea4437.tar.gz bcm5719-llvm-efd72857a341d62a344dbeaf8baae56454ea4437.zip | |
[RDF] Handle undefined registers in RDF copy propagation
When updating the graph, make sure that new uses without reaching defs
are handled correctly.
llvm-svn: 267891
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/Hexagon/RDFCopy.cpp | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/llvm/lib/Target/Hexagon/RDFCopy.cpp b/llvm/lib/Target/Hexagon/RDFCopy.cpp index 251e175e228..c777878df30 100644 --- a/llvm/lib/Target/Hexagon/RDFCopy.cpp +++ b/llvm/lib/Target/Hexagon/RDFCopy.cpp @@ -218,7 +218,12 @@ bool CopyPropagation::run() { Op.setReg(SR.Reg); Op.setSubReg(SR.Sub); DFG.unlinkUse(UA, false); - UA.Addr->linkToDef(UA.Id, DFG.addr<DefNode*>(RDefSR_SA)); + if (RDefSR_SA != 0) { + UA.Addr->linkToDef(UA.Id, DFG.addr<DefNode*>(RDefSR_SA)); + } else { + UA.Addr->setReachingDef(0); + UA.Addr->setSibling(0); + } Changed = true; #ifndef NDEBUG |
