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Implement extension of sign bits for negative values in the uint64_t

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constructor. This helps to fix test/Assembler/2007-03-19-NegValue.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35180 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer 2007-03-19 20:37:47 +00:00
parent 95da121395
commit 3a34137548
1 changed files with 5 additions and 1 deletions
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6
lib/Support/APInt.cpp
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@ -43,7 +43,8 @@ inline static uint64_t* getMemory(uint32_t numWords) {
return result; return result;
} }
APInt::APInt(uint32_t numBits, uint64_t val) : BitWidth(numBits), VAL(0) { APInt::APInt(uint32_t numBits, uint64_t val, bool isSigned )
: BitWidth(numBits), VAL(0) {
assert(BitWidth >= IntegerType::MIN_INT_BITS && "bitwidth too small"); assert(BitWidth >= IntegerType::MIN_INT_BITS && "bitwidth too small");
assert(BitWidth <= IntegerType::MAX_INT_BITS && "bitwidth too large"); assert(BitWidth <= IntegerType::MAX_INT_BITS && "bitwidth too large");
if (isSingleWord()) if (isSingleWord())
@ -51,6 +52,9 @@ APInt::APInt(uint32_t numBits, uint64_t val) : BitWidth(numBits), VAL(0) {
else { else {
pVal = getClearedMemory(getNumWords()); pVal = getClearedMemory(getNumWords());
pVal[0] = val; pVal[0] = val;
if (isSigned && int64_t(val) < 0)
for (unsigned i = 1; i < getNumWords(); ++i)
pVal[i] = -1ULL;
} }
clearUnusedBits(); clearUnusedBits();
} }