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Initialize the IndexedModeActions array with memset before

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updating it with calls to setIndexedLoadAction/setIndexedStoreAction,
which only update a few bits at a time. This avoids ostensible
undefined behavior of operationg on values which may be
trap-representations, and as a practical matter fixes errors from
valgrind, which doesn't track uninitialized memory with bit
granularity.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38468 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2007-07-09 20:49:44 +00:00
parent da8ebc6b43
commit 93f81e2822
1 changed files with 3 additions and 1 deletions
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4
lib/CodeGen/SelectionDAG/TargetLowering.cpp
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@ -128,7 +128,9 @@ TargetLowering::TargetLowering(TargetMachine &tm)
memset(OpActions, 0, sizeof(OpActions));
memset(LoadXActions, 0, sizeof(LoadXActions));
memset(&StoreXActions, 0, sizeof(StoreXActions));
// Initialize all indexed load / store to expand.
memset(&IndexedModeActions, 0, sizeof(IndexedModeActions));
// Set all indexed load / store to expand.
for (unsigned VT = 0; VT != (unsigned)MVT::LAST_VALUETYPE; ++VT) {
for (unsigned IM = (unsigned)ISD::PRE_INC;
IM != (unsigned)ISD::LAST_INDEXED_MODE; ++IM) {