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Fix a dagcombine to not generate loads of non-round integer types,

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as its comment says, even in the case where it will be generating
extending loads. This fixes PR3216.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62557 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2009-01-20 01:06:45 +00:00
parent c2997f4a34
commit f5add58549
2 changed files with 15 additions and 1 deletions
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2
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -3343,7 +3343,7 @@ SDValue DAGCombiner::ReduceLoadWidth(SDNode *N) {
// Do not generate loads of non-round integer types since these can
// be expensive (and would be wrong if the type is not byte sized).
if (isa<LoadSDNode>(N0) && N0.hasOneUse() && VT.isRound() &&
if (isa<LoadSDNode>(N0) && N0.hasOneUse() && EVT.isRound() &&
cast<LoadSDNode>(N0)->getMemoryVT().getSizeInBits() > EVTBits &&
// Do not change the width of a volatile load.
!cast<LoadSDNode>(N0)->isVolatile()) {