// Vector Operand Scalarization: <1 x ty> -> ty.
bool ScalarizeVectorOperand(SDNode *N, unsigned OpNo);
SDValue ScalarizeVecOp_BITCAST(SDNode *N);
- SDValue ScalarizeVecOp_EXTEND(SDNode *N);
+ SDValue ScalarizeVecOp_UnaryOp(SDNode *N);
SDValue ScalarizeVecOp_CONCAT_VECTORS(SDNode *N);
SDValue ScalarizeVecOp_EXTRACT_VECTOR_ELT(SDNode *N);
SDValue ScalarizeVecOp_STORE(StoreSDNode *N, unsigned OpNo);
case ISD::ANY_EXTEND:
case ISD::ZERO_EXTEND:
case ISD::SIGN_EXTEND:
- Res = ScalarizeVecOp_EXTEND(N);
+ case ISD::TRUNCATE:
+ Res = ScalarizeVecOp_UnaryOp(N);
break;
case ISD::CONCAT_VECTORS:
Res = ScalarizeVecOp_CONCAT_VECTORS(N);
/// ScalarizeVecOp_EXTEND - If the value to extend is a vector that needs
/// to be scalarized, it must be <1 x ty>. Extend the element instead.
-SDValue DAGTypeLegalizer::ScalarizeVecOp_EXTEND(SDNode *N) {
+SDValue DAGTypeLegalizer::ScalarizeVecOp_UnaryOp(SDNode *N) {
assert(N->getValueType(0).getVectorNumElements() == 1 &&
"Unexected vector type!");
SDValue Elt = GetScalarizedVector(N->getOperand(0));
%vmull.i = tail call <8 x i16> @llvm.arm.neon.vmullu.v8i16(<8 x i8> %0, <8 x i8> %1)
ret <8 x i16> %vmull.i
}
+
+; <rdar://problem/14989896> Make sure we manage to truncate a vector from an
+; illegal type to a legal type.
+define <2 x i8> @test_truncate(<2 x i128> %in) {
+; CHECK-LABEL: test_truncate:
+; CHECK: mov [[BASE:r[0-9]+]], sp
+; CHECK-NEXT: vld1.32 {[[REG1:d[0-9]+]][0]}, {{\[}}[[BASE]]:32]
+; CHECK-NEXT: add [[BASE2:r[0-9]+]], [[BASE]], #4
+; CHECK-NEXT: vld1.32 {[[REG1]][1]}, {{\[}}[[BASE2]]:32]
+; REG2 Should map on the same Q register as REG1, i.e., REG2 = REG1 - 1, but we
+; cannot express that.
+; CHECK-NEXT: vmov.32 [[REG2:d[0-9]+]][0], r0
+; CHECK-NEXT: vmov.32 [[REG2]][1], r1
+; The Q register used here should match floor(REG1/2), but we cannot express that.
+; CHECK-NEXT: vmovn.i64 [[RES:d[0-9]+]], q{{[0-9]+}}
+; CHECK-NEXT: vmov r0, r1, [[RES]]
+entry:
+ %res = trunc <2 x i128> %in to <2 x i8>
+ ret <2 x i8> %res
+}