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Fix a bug indicated by -fsanitize=shift-exponent.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233881 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alexey Samsonov
2015-04-02 01:30:10 +00:00
parent 8ce5d8e3e7
commit d148e322a9
1 changed files with 1 additions and 1 deletions
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2
lib/Transforms/Utils/LoopUnrollRuntime.cpp
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@@ -320,7 +320,7 @@ bool llvm::UnrollRuntimeLoopProlog(Loop *L, unsigned Count, LoopInfo *LI,
// This constraint lets us deal with an overflowing trip count easily; see the // This constraint lets us deal with an overflowing trip count easily; see the
// comment on ModVal below. This check is equivalent to `Log2(Count) < // comment on ModVal below. This check is equivalent to `Log2(Count) <
// BEWidth`. // BEWidth`.
if (static_cast<uint64_t>(Count) > (1ULL << BEWidth)) if (BEWidth < 64 && static_cast<uint64_t>(Count) > (1ULL << BEWidth))
return false; return false;
// If this loop is nested, then the loop unroller changes the code in // If this loop is nested, then the loop unroller changes the code in