+std::pair<const TargetRegisterClass*, uint8_t>
+X86TargetLowering::findRepresentativeClass(EVT VT) const{
+ const TargetRegisterClass *RRC = 0;
+ uint8_t Cost = 1;
+ switch (VT.getSimpleVT().SimpleTy) {
+ default:
+ return TargetLowering::findRepresentativeClass(VT);
+ case MVT::i8: case MVT::i16: case MVT::i32: case MVT::i64:
+ RRC = (Subtarget->is64Bit()
+ ? X86::GR64RegisterClass : X86::GR32RegisterClass);
+ break;
+ case MVT::v8i8: case MVT::v4i16:
+ case MVT::v2i32: case MVT::v1i64:
+ RRC = X86::VR64RegisterClass;
+ break;
+ case MVT::f32: case MVT::f64:
+ case MVT::v16i8: case MVT::v8i16: case MVT::v4i32: case MVT::v2i64:
+ case MVT::v4f32: case MVT::v2f64:
+ case MVT::v32i8: case MVT::v8i32: case MVT::v4i64: case MVT::v8f32:
+ case MVT::v4f64:
+ RRC = X86::VR128RegisterClass;
+ break;
+ }
+ return std::make_pair(RRC, Cost);
+}
+