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Double the amount of memory reserved for SUnits. This is a

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temporary workaround for an obscure bug. When node cloning is
used, it is possible that more SUnits will be created, and
if the SUnits std::vector has to reallocate, it will
invalidate all the graph edges.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61122 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2008-12-17 04:30:46 +00:00
parent fccf6dd377
commit 89b64bd7e5
1 changed files with 3 additions and 1 deletions
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4
lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp
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@ -71,7 +71,9 @@ void ScheduleDAGSDNodes::BuildSchedUnits() {
// Reserve entries in the vector for each of the SUnits we are creating. This
// ensure that reallocation of the vector won't happen, so SUnit*'s won't get
// invalidated.
SUnits.reserve(DAG->allnodes_size());
// FIXME: Multiply by 2 because we may clone nodes during scheduling.
// This is a temporary workaround.
SUnits.reserve(DAG->allnodes_size() * 2);
// During scheduling, the NodeId field of SDNode is used to map SDNodes
// to their associated SUnits by holding SUnits table indices. A value