xref: /llvm-project/llvm/test/TableGen/bare-minimum-psets.td (revision 62b3d8d10a04584c93875d9579f3d7fa273c3a2a) 
1// RUN: llvm-tblgen -gen-register-info -I %p/../../include -I %p/Common %s | FileCheck %s
2
3// Test to check the bare minimum pressure sets.
4// At least one register pressure set is required for the target.
5// Allowed the pset only for D_32 regclass and ignored it for all
6// other classes including the tuples.
7include "llvm/Target/Target.td"
8
9class MyClass<int size, list<ValueType> types, dag registers>
10  : RegisterClass<"MyTarget", types, size, registers> {
11  let Size = size;
12}
13
14def sub0 : SubRegIndex<32>;
15def sub1 : SubRegIndex<32, 32>;
16
17let Namespace = "MyTarget" in {
18  def D : Register<"d">;
19  foreach Index = 0-7 in {
20    def S#Index : Register <"s"#Index>;
21  }
22}
23
24// Should generate psets for D_32
25def D_32 : MyClass<32,  [i32], (add D)>;
26
27let GeneratePressureSet = 0 in {
28  def S_32 : MyClass<32,  [i32], (sequence "S%u", 0, 7)>;
29  def SD_32 : MyClass<32,  [i32], (add S_32, D_32)>;
30}
31
32def S_64 : RegisterTuples<[sub0, sub1],
33                           [(decimate (shl S_32, 0), 1),
34                            (decimate (shl S_32, 1), 1)
35                           ]>;
36
37def SReg_64 : MyClass<64, [i64], (add S_64)> {
38  let GeneratePressureSet = 0;
39}
40
41def MyTarget : Target;
42
43// CHECK-LABEL:    // Register pressure sets enum.
44// CHECK-NEXT: namespace MyTarget {
45// CHECK-NEXT: enum RegisterPressureSets {
46// CHECK-NEXT: D_32 = 0,
47// CHECK-NEXT:  };
48// NAMESPACE-NEXT: } // end namespace TestNamespace
49
50// CHECK-LABEL: getRegPressureSetName(unsigned Idx) const {
51// CHECK-NEXT:    static const char *PressureNameTable[] = {
52// CHECK-NEXT:      "D_32",
53// CHECK-NEXT:    };
54// CHECK-NEXT:    return PressureNameTable[Idx];
55// CHECK-NEXT:  }
56
57// CHECK:      unsigned MyTargetGenRegisterInfo::
58// CHECK-NEXT: getRegPressureSetLimit(const MachineFunction &MF, unsigned Idx) const {
59// CHECK-NEXT:  static const uint8_t PressureLimitTable[] = {
60// CHECK-NEXT:    {{[0-9]+}},        // 0: D_32
61// CHECK-NEXT:  };
62// CHECK-NEXT:  return PressureLimitTable[Idx];
63// CHECK-NEXT:}
64
65// CHECK:      static const int RCSetsTable[] = {
66// CHECK-NEXT:   /* 0 */ 0, -1,
67// CHECK-NEXT: };
68