return false;
// Expect 1, 1, 3, 3
+ unsigned NumNodes = 0;
for (unsigned i = 0; i < 2; ++i) {
SDOperand Arg = N->getOperand(i);
if (Arg.getOpcode() == ISD::UNDEF) continue;
assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
if (Val != 1) return false;
+ NumNodes++;
}
for (unsigned i = 2; i < 4; ++i) {
SDOperand Arg = N->getOperand(i);
assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
if (Val != 3) return false;
+ NumNodes++;
}
- return true;
+
+ // Don't use movshdup if the resulting vector contains only one undef node.
+ // Use {p}shuf* instead.
+ return NumNodes > 1;
}
/// isMOVSLDUPMask - Return true if the specified VECTOR_SHUFFLE operand
return false;
// Expect 0, 0, 2, 2
+ unsigned NumNodes = 0;
for (unsigned i = 0; i < 2; ++i) {
SDOperand Arg = N->getOperand(i);
if (Arg.getOpcode() == ISD::UNDEF) continue;
assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
if (Val != 0) return false;
+ NumNodes++;
}
for (unsigned i = 2; i < 4; ++i) {
SDOperand Arg = N->getOperand(i);
assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
if (Val != 2) return false;
+ NumNodes++;
}
- return true;
+
+ // Don't use movsldup if the resulting vector contains only one undef node.
+ // Use {p}shuf* instead.
+ return NumNodes > 1;
}
/// isSplatMask - Return true if the specified VECTOR_SHUFFLE operand specifies