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Use a utility from MathExtras to clarify a check and avoid undefined behavior. Based on patch by Ahmed Charles.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141829 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eli Friedman 2011-10-12 22:46:45 +00:00
parent 95f8db4d4d
commit 5c75af6eb7
1 changed files with 1 additions and 1 deletions
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2
lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
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@ -1679,7 +1679,7 @@ void SelectionDAGBuilder::visitBitTestHeader(BitTestBlock &B,
UsePtrType = true;
else {
for (unsigned i = 0, e = B.Cases.size(); i != e; ++i)
if ((uint64_t)((int64_t)B.Cases[i].Mask >> VT.getSizeInBits()) + 1 >= 2) {
if (!isUIntN(VT.getSizeInBits(), B.Cases[i].Mask)) {
// Switch table case range are encoded into series of masks.
// Just use pointer type, it's guaranteed to fit.
UsePtrType = true;