// Look for an 'and' of two (opposite) logical shifts.
// Pick the single-use shift as XShift.
- Value *XShift, *YShift;
+ Instruction *XShift, *YShift;
if (!match(I.getOperand(0),
- m_c_And(m_CombineAnd(m_AnyLogicalShift, m_Value(XShift)),
- m_CombineAnd(m_AnyLogicalShift, m_Value(YShift)))))
+ m_c_And(m_CombineAnd(m_AnyLogicalShift, m_Instruction(XShift)),
+ m_CombineAnd(m_AnyLogicalShift, m_Instruction(YShift)))))
return nullptr;
// If YShift is a 'lshr', swap the shifts around.
std::swap(XShift, YShift);
// The shifts must be in opposite directions.
- Instruction::BinaryOps XShiftOpcode =
- cast<BinaryOperator>(XShift)->getOpcode();
- if (XShiftOpcode == cast<BinaryOperator>(YShift)->getOpcode())
+ auto XShiftOpcode = XShift->getOpcode();
+ if (XShiftOpcode == YShift->getOpcode())
return nullptr; // Do not care about same-direction shifts here.
Value *X, *XShAmt, *Y, *YShAmt;
%t3 = icmp ne <2 x i32> %t2, <i32 0, i32 0>
ret <2 x i1> %t3
}
+
+; As usual, don't crash given constantexpr's :/
+@f.a = internal global i16 0
+define i1 @constantexpr() {
+entry:
+ %0 = load i16, i16* @f.a
+ %shr = ashr i16 %0, 1
+ %shr1 = ashr i16 %shr, zext (i1 icmp ne (i16 ptrtoint (i16* @f.a to i16), i16 1) to i16)
+ %and = and i16 %shr1, 1
+ %tobool = icmp ne i16 %and, 0
+ ret i1 %tobool
+}