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Use sub "no-wrap"

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Paweł Bylica 2014-12-23 00:49:23 +01:00
parent 6acbfe07b2
commit 69930b9bcd
1 changed files with 1 additions and 1 deletions
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2
libevmjit/Memory.cpp
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@ -208,7 +208,7 @@ void Memory::copyBytes(llvm::Value* _srcPtr, llvm::Value* _srcSize, llvm::Value*
auto isOutsideData = m_builder.CreateICmpUGE(_srcIdx, _srcSize); auto isOutsideData = m_builder.CreateICmpUGE(_srcIdx, _srcSize);
auto idx64 = m_builder.CreateTrunc(_srcIdx, Type::lowPrecision); auto idx64 = m_builder.CreateTrunc(_srcIdx, Type::lowPrecision);
auto size64 = m_builder.CreateTrunc(_srcSize, Type::lowPrecision); auto size64 = m_builder.CreateTrunc(_srcSize, Type::lowPrecision);
auto dataLeftSize = m_builder.CreateSub(size64, idx64); auto dataLeftSize = m_builder.CreateNUWSub(size64, idx64);
auto reqBytes64 = m_builder.CreateTrunc(_reqBytes, Type::lowPrecision); auto reqBytes64 = m_builder.CreateTrunc(_reqBytes, Type::lowPrecision);
auto outOfBound = m_builder.CreateICmpUGT(reqBytes64, dataLeftSize); auto outOfBound = m_builder.CreateICmpUGT(reqBytes64, dataLeftSize);
auto bytesToCopyInner = m_builder.CreateSelect(outOfBound, dataLeftSize, reqBytes64); auto bytesToCopyInner = m_builder.CreateSelect(outOfBound, dataLeftSize, reqBytes64);