Implement extension of sign bits for negative values in the uint64_t
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
diff --git a/lib/Support/APInt.cpp b/lib/Support/APInt.cpp
index 08ec236..0d0f9ff 100644
--- a/lib/Support/APInt.cpp
+++ b/lib/Support/APInt.cpp
@@ -43,7 +43,8 @@
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::MAX_INT_BITS && "bitwidth too large");
if (isSingleWord())
@@ -51,6 +52,9 @@
else {
pVal = getClearedMemory(getNumWords());
pVal[0] = val;
+ if (isSigned && int64_t(val) < 0)
+ for (unsigned i = 1; i < getNumWords(); ++i)
+ pVal[i] = -1ULL;
}
clearUnusedBits();
}