Lines Matching defs:BitPos

2421                                          Value *&BitMask, Value *&BitPos,
2458                              m_LoopInvariant(m_Shl(m_One(), m_Value(BitPos)),
2465            (BitPos = ConstantExpr::getExactLogBase2(cast<Constant>(BitMask)));
2472            (BitPos = ConstantInt::get(CurrX->getType(), Mask.logBase2()));
2576   Value *X, *BitMask, *BitPos, *XCurr;
2578   if (!detectShiftUntilBitTestIdiom(CurLoop, X, BitMask, BitPos, XCurr,
2626   if (!isGuaranteedNotToBeUndefOrPoison(BitPos)) {
2627     // BitMask may be computed from BitPos, Freeze BitPos so we can increase
2630     if (auto *BitPosI = dyn_cast<Instruction>(BitPos))
2637         new FreezeInst(BitPos, BitPos->getName() + ".fr", *InsertPt);
2638     BitPos->replaceUsesWithIf(BitPosFrozen, [BitPosFrozen](Use &U) {
2641     BitPos = BitPosFrozen;
2647                                         BitPos->getName() + ".lowbitmask");
2649       Builder.CreateOr(LowBitMask, BitMask, BitPos->getName() + ".mask");
2664       BitPos, XMaskedLeadingOnePos, CurLoop->getName() + ".backedgetakencount",
2685   // iff `BitPos` is `bitwidth(x) - 1` and `X` is `1`). So unless we know
2689           BitPos, PatternMatch::m_SpecificInt_ICMP(
2695     // alternatively, we could check that NewX is INT_MIN (or BitPos is )