diff options
Diffstat (limited to 'lib/Analysis/ConstantFolding.cpp')
| -rw-r--r-- | lib/Analysis/ConstantFolding.cpp | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/lib/Analysis/ConstantFolding.cpp b/lib/Analysis/ConstantFolding.cpp index 3294865a10..3030504961 100644 --- a/lib/Analysis/ConstantFolding.cpp +++ b/lib/Analysis/ConstantFolding.cpp @@ -232,7 +232,7 @@ static Constant *FoldReinterpretLoadFromConstPtr(Constant *C, } unsigned BytesLoaded = (IntType->getBitWidth() + 7) / 8; - if (BytesLoaded > 8 || BytesLoaded == 0) return 0; + if (BytesLoaded > 32 || BytesLoaded == 0) return 0; GlobalValue *GVal; int64_t Offset; @@ -253,16 +253,18 @@ static Constant *FoldReinterpretLoadFromConstPtr(Constant *C, if (uint64_t(Offset) >= TD.getTypeAllocSize(GV->getInitializer()->getType())) return UndefValue::get(IntType); - unsigned char RawBytes[8] = {0}; + unsigned char RawBytes[32] = {0}; if (!ReadDataFromGlobal(GV->getInitializer(), Offset, RawBytes, BytesLoaded, TD)) return 0; - uint64_t ResultVal = 0; - for (unsigned i = 0; i != BytesLoaded; ++i) - ResultVal |= (uint64_t)RawBytes[i] << (i * 8); + APInt ResultVal(IntType->getBitWidth(), 0); + for (unsigned i = 0; i != BytesLoaded; ++i) { + ResultVal <<= 8; + ResultVal |= APInt(IntType->getBitWidth(), RawBytes[BytesLoaded-1-i]); + } - return ConstantInt::get(IntType, ResultVal); + return ConstantInt::get(IntType->getContext(), ResultVal); } /// ConstantFoldLoadFromConstPtr - Return the value that a load from C would |