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| author | Evan Cheng <evan.cheng@apple.com> | 2009-05-28 23:52:18 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2009-05-28 23:52:18 +0000 |
| commit | d3c76bb6fc3c066286850e91b8bf03484ea2a56e (patch) | |
| tree | ddc9f96ae7a0778351a62a3c122511d14e8d304c /lib/CodeGen/SelectionDAG | |
| parent | 2265ba071762b461ed1e65ebd73f596a98208f60 (diff) | |
| download | external_llvm-d3c76bb6fc3c066286850e91b8bf03484ea2a56e.zip external_llvm-d3c76bb6fc3c066286850e91b8bf03484ea2a56e.tar.gz external_llvm-d3c76bb6fc3c066286850e91b8bf03484ea2a56e.tar.bz2 | |
Do not try to create a MVT type of width 0.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72557 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SelectionDAG')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 3bc9cf0..4c1710d 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -4937,6 +4937,8 @@ SDValue DAGCombiner::ReduceLoadOpStoreWidth(SDNode *N) { APInt Imm = cast<ConstantSDNode>(N1)->getAPIntValue(); if (Opc == ISD::AND) Imm ^= APInt::getAllOnesValue(BitWidth); + if (Imm == 0 || Imm.isAllOnesValue()) + return SDValue(); unsigned ShAmt = Imm.countTrailingZeros(); unsigned MSB = BitWidth - Imm.countLeadingZeros() - 1; unsigned NewBW = NextPowerOf2(MSB - ShAmt); |