if (Q.ExclInvs.count(I))
continue;
- if (match(I, m_Intrinsic<Intrinsic::assume>(m_Specific(V))) &&
+ // Warning: This loop can end up being somewhat performance sensetive.
+ // We're running this loop for once for each value queried resulting in a
+ // runtime of ~O(#assumes * #values).
+
+ assert(isa<IntrinsicInst>(I) &&
+ dyn_cast<IntrinsicInst>(I)->getIntrinsicID() == Intrinsic::assume &&
+ "must be an assume intrinsic");
+
+ Value *Arg = I->getArgOperand(0);
+
+ if (Arg == V &&
isValidAssumeForContext(I, Q, DL)) {
assert(BitWidth == 1 && "assume operand is not i1?");
KnownZero.clearAllBits();
CmpInst::Predicate Pred;
ConstantInt *C;
// assume(v = a)
- if (match(I, m_Intrinsic<Intrinsic::assume>(
- m_c_ICmp(Pred, m_V, m_Value(A)))) &&
+ if (match(Arg, m_c_ICmp(Pred, m_V, m_Value(A))) &&
Pred == ICmpInst::ICMP_EQ && isValidAssumeForContext(I, Q, DL)) {
APInt RHSKnownZero(BitWidth, 0), RHSKnownOne(BitWidth, 0);
computeKnownBits(A, RHSKnownZero, RHSKnownOne, DL, Depth+1, Query(Q, I));
KnownZero |= RHSKnownZero;
KnownOne |= RHSKnownOne;
// assume(v & b = a)
- } else if (match(I, m_Intrinsic<Intrinsic::assume>(
- m_c_ICmp(Pred, m_c_And(m_V, m_Value(B)), m_Value(A)))) &&
+ } else if (match(Arg, m_c_ICmp(Pred, m_c_And(m_V, m_Value(B)),
+ m_Value(A))) &&
Pred == ICmpInst::ICMP_EQ && isValidAssumeForContext(I, Q, DL)) {
APInt RHSKnownZero(BitWidth, 0), RHSKnownOne(BitWidth, 0);
computeKnownBits(A, RHSKnownZero, RHSKnownOne, DL, Depth+1, Query(Q, I));
KnownZero |= RHSKnownZero & MaskKnownOne;
KnownOne |= RHSKnownOne & MaskKnownOne;
// assume(~(v & b) = a)
- } else if (match(I, m_Intrinsic<Intrinsic::assume>(
- m_c_ICmp(Pred, m_Not(m_c_And(m_V, m_Value(B))),
- m_Value(A)))) &&
+ } else if (match(Arg, m_c_ICmp(Pred, m_Not(m_c_And(m_V, m_Value(B))),
+ m_Value(A))) &&
Pred == ICmpInst::ICMP_EQ && isValidAssumeForContext(I, Q, DL)) {
APInt RHSKnownZero(BitWidth, 0), RHSKnownOne(BitWidth, 0);
computeKnownBits(A, RHSKnownZero, RHSKnownOne, DL, Depth+1, Query(Q, I));
KnownZero |= RHSKnownOne & MaskKnownOne;
KnownOne |= RHSKnownZero & MaskKnownOne;
// assume(v | b = a)
- } else if (match(I, m_Intrinsic<Intrinsic::assume>(
- m_c_ICmp(Pred, m_c_Or(m_V, m_Value(B)), m_Value(A)))) &&
+ } else if (match(Arg, m_c_ICmp(Pred, m_c_Or(m_V, m_Value(B)),
+ m_Value(A))) &&
Pred == ICmpInst::ICMP_EQ && isValidAssumeForContext(I, Q, DL)) {
APInt RHSKnownZero(BitWidth, 0), RHSKnownOne(BitWidth, 0);
computeKnownBits(A, RHSKnownZero, RHSKnownOne, DL, Depth+1, Query(Q, I));
KnownZero |= RHSKnownZero & BKnownZero;
KnownOne |= RHSKnownOne & BKnownZero;
// assume(~(v | b) = a)
- } else if (match(I, m_Intrinsic<Intrinsic::assume>(
- m_c_ICmp(Pred, m_Not(m_c_Or(m_V, m_Value(B))),
- m_Value(A)))) &&
+ } else if (match(Arg, m_c_ICmp(Pred, m_Not(m_c_Or(m_V, m_Value(B))),
+ m_Value(A))) &&
Pred == ICmpInst::ICMP_EQ && isValidAssumeForContext(I, Q, DL)) {
APInt RHSKnownZero(BitWidth, 0), RHSKnownOne(BitWidth, 0);
computeKnownBits(A, RHSKnownZero, RHSKnownOne, DL, Depth+1, Query(Q, I));
KnownZero |= RHSKnownOne & BKnownZero;
KnownOne |= RHSKnownZero & BKnownZero;
// assume(v ^ b = a)
- } else if (match(I, m_Intrinsic<Intrinsic::assume>(
- m_c_ICmp(Pred, m_c_Xor(m_V, m_Value(B)), m_Value(A)))) &&
+ } else if (match(Arg, m_c_ICmp(Pred, m_c_Xor(m_V, m_Value(B)),
+ m_Value(A))) &&
Pred == ICmpInst::ICMP_EQ && isValidAssumeForContext(I, Q, DL)) {
APInt RHSKnownZero(BitWidth, 0), RHSKnownOne(BitWidth, 0);
computeKnownBits(A, RHSKnownZero, RHSKnownOne, DL, Depth+1, Query(Q, I));
KnownZero |= RHSKnownOne & BKnownOne;
KnownOne |= RHSKnownZero & BKnownOne;
// assume(~(v ^ b) = a)
- } else if (match(I, m_Intrinsic<Intrinsic::assume>(
- m_c_ICmp(Pred, m_Not(m_c_Xor(m_V, m_Value(B))),
- m_Value(A)))) &&
+ } else if (match(Arg, m_c_ICmp(Pred, m_Not(m_c_Xor(m_V, m_Value(B))),
+ m_Value(A))) &&
Pred == ICmpInst::ICMP_EQ && isValidAssumeForContext(I, Q, DL)) {
APInt RHSKnownZero(BitWidth, 0), RHSKnownOne(BitWidth, 0);
computeKnownBits(A, RHSKnownZero, RHSKnownOne, DL, Depth+1, Query(Q, I));
KnownZero |= RHSKnownZero & BKnownOne;
KnownOne |= RHSKnownOne & BKnownOne;
// assume(v << c = a)
- } else if (match(I, m_Intrinsic<Intrinsic::assume>(
- m_c_ICmp(Pred, m_Shl(m_V, m_ConstantInt(C)),
- m_Value(A)))) &&
+ } else if (match(Arg, m_c_ICmp(Pred, m_Shl(m_V, m_ConstantInt(C)),
+ m_Value(A))) &&
Pred == ICmpInst::ICMP_EQ && isValidAssumeForContext(I, Q, DL)) {
APInt RHSKnownZero(BitWidth, 0), RHSKnownOne(BitWidth, 0);
computeKnownBits(A, RHSKnownZero, RHSKnownOne, DL, Depth+1, Query(Q, I));
KnownZero |= RHSKnownZero.lshr(C->getZExtValue());
KnownOne |= RHSKnownOne.lshr(C->getZExtValue());
// assume(~(v << c) = a)
- } else if (match(I, m_Intrinsic<Intrinsic::assume>(
- m_c_ICmp(Pred, m_Not(m_Shl(m_V, m_ConstantInt(C))),
- m_Value(A)))) &&
+ } else if (match(Arg, m_c_ICmp(Pred, m_Not(m_Shl(m_V, m_ConstantInt(C))),
+ m_Value(A))) &&
Pred == ICmpInst::ICMP_EQ && isValidAssumeForContext(I, Q, DL)) {
APInt RHSKnownZero(BitWidth, 0), RHSKnownOne(BitWidth, 0);
computeKnownBits(A, RHSKnownZero, RHSKnownOne, DL, Depth+1, Query(Q, I));
KnownZero |= RHSKnownOne.lshr(C->getZExtValue());
KnownOne |= RHSKnownZero.lshr(C->getZExtValue());
// assume(v >> c = a)
- } else if (match(I, m_Intrinsic<Intrinsic::assume>(
- m_c_ICmp(Pred, m_CombineOr(m_LShr(m_V, m_ConstantInt(C)),
+ } else if (match(Arg,
+ m_c_ICmp(Pred, m_CombineOr(m_LShr(m_V, m_ConstantInt(C)),
m_AShr(m_V,
m_ConstantInt(C))),
- m_Value(A)))) &&
+ m_Value(A))) &&
Pred == ICmpInst::ICMP_EQ && isValidAssumeForContext(I, Q, DL)) {
APInt RHSKnownZero(BitWidth, 0), RHSKnownOne(BitWidth, 0);
computeKnownBits(A, RHSKnownZero, RHSKnownOne, DL, Depth+1, Query(Q, I));
KnownZero |= RHSKnownZero << C->getZExtValue();
KnownOne |= RHSKnownOne << C->getZExtValue();
// assume(~(v >> c) = a)
- } else if (match(I, m_Intrinsic<Intrinsic::assume>(
- m_c_ICmp(Pred, m_Not(m_CombineOr(
+ } else if (match(Arg, m_c_ICmp(Pred, m_Not(m_CombineOr(
m_LShr(m_V, m_ConstantInt(C)),
m_AShr(m_V, m_ConstantInt(C)))),
- m_Value(A)))) &&
+ m_Value(A))) &&
Pred == ICmpInst::ICMP_EQ && isValidAssumeForContext(I, Q, DL)) {
APInt RHSKnownZero(BitWidth, 0), RHSKnownOne(BitWidth, 0);
computeKnownBits(A, RHSKnownZero, RHSKnownOne, DL, Depth+1, Query(Q, I));
KnownZero |= RHSKnownOne << C->getZExtValue();
KnownOne |= RHSKnownZero << C->getZExtValue();
// assume(v >=_s c) where c is non-negative
- } else if (match(I, m_Intrinsic<Intrinsic::assume>(
- m_ICmp(Pred, m_V, m_Value(A)))) &&
+ } else if (match(Arg, m_ICmp(Pred, m_V, m_Value(A))) &&
Pred == ICmpInst::ICMP_SGE &&
isValidAssumeForContext(I, Q, DL)) {
APInt RHSKnownZero(BitWidth, 0), RHSKnownOne(BitWidth, 0);
KnownZero |= APInt::getSignBit(BitWidth);
}
// assume(v >_s c) where c is at least -1.
- } else if (match(I, m_Intrinsic<Intrinsic::assume>(
- m_ICmp(Pred, m_V, m_Value(A)))) &&
+ } else if (match(Arg, m_ICmp(Pred, m_V, m_Value(A))) &&
Pred == ICmpInst::ICMP_SGT &&
isValidAssumeForContext(I, Q, DL)) {
APInt RHSKnownZero(BitWidth, 0), RHSKnownOne(BitWidth, 0);
KnownZero |= APInt::getSignBit(BitWidth);
}
// assume(v <=_s c) where c is negative
- } else if (match(I, m_Intrinsic<Intrinsic::assume>(
- m_ICmp(Pred, m_V, m_Value(A)))) &&
+ } else if (match(Arg, m_ICmp(Pred, m_V, m_Value(A))) &&
Pred == ICmpInst::ICMP_SLE &&
isValidAssumeForContext(I, Q, DL)) {
APInt RHSKnownZero(BitWidth, 0), RHSKnownOne(BitWidth, 0);
KnownOne |= APInt::getSignBit(BitWidth);
}
// assume(v <_s c) where c is non-positive
- } else if (match(I, m_Intrinsic<Intrinsic::assume>(
- m_ICmp(Pred, m_V, m_Value(A)))) &&
+ } else if (match(Arg, m_ICmp(Pred, m_V, m_Value(A))) &&
Pred == ICmpInst::ICMP_SLT &&
isValidAssumeForContext(I, Q, DL)) {
APInt RHSKnownZero(BitWidth, 0), RHSKnownOne(BitWidth, 0);
KnownOne |= APInt::getSignBit(BitWidth);
}
// assume(v <=_u c)
- } else if (match(I, m_Intrinsic<Intrinsic::assume>(
- m_ICmp(Pred, m_V, m_Value(A)))) &&
+ } else if (match(Arg, m_ICmp(Pred, m_V, m_Value(A))) &&
Pred == ICmpInst::ICMP_ULE &&
isValidAssumeForContext(I, Q, DL)) {
APInt RHSKnownZero(BitWidth, 0), RHSKnownOne(BitWidth, 0);
KnownZero |=
APInt::getHighBitsSet(BitWidth, RHSKnownZero.countLeadingOnes());
// assume(v <_u c)
- } else if (match(I, m_Intrinsic<Intrinsic::assume>(
- m_ICmp(Pred, m_V, m_Value(A)))) &&
+ } else if (match(Arg, m_ICmp(Pred, m_V, m_Value(A))) &&
Pred == ICmpInst::ICMP_ULT &&
isValidAssumeForContext(I, Q, DL)) {
APInt RHSKnownZero(BitWidth, 0), RHSKnownOne(BitWidth, 0);