xref: /llvm-project/clang/test/CodeGenHLSL/inline-constructors.hlsl (revision c2063de1593610eda0f4de33c3b89324642ed54c) 
1// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.0-compute -std=hlsl202x -emit-llvm -o - -disable-llvm-passes %s | FileCheck %s --check-prefixes=CHECK,NOINLINE
2// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.3-library -std=hlsl202x -emit-llvm -o - -disable-llvm-passes %s | FileCheck %s --check-prefixes=CHECK,NOINLINE
3// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.0-compute -std=hlsl202x -emit-llvm -o - -O0 %s | FileCheck %s --check-prefixes=CHECK,INLINE
4// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.3-library -std=hlsl202x -emit-llvm -o - -O0 %s | FileCheck %s --check-prefixes=CHECK,INLINE
5// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.0-compute -std=hlsl202x -emit-llvm -o - -O1 %s | FileCheck %s --check-prefixes=CHECK,INLINE
6// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.3-library -std=hlsl202x -emit-llvm -o - -O1 %s | FileCheck %s --check-prefixes=CHECK,INLINE
7
8// Tests that implicit constructor calls for user classes will always be inlined.
9
10struct Weed {
11  Weed() {Count += 1;}
12  [[maybe_unused]] void pull() {Count--;}
13  static int weedCount() { return Count; }
14private:
15  static int Count;
16
17} YardWeeds;
18
19int Weed::Count = 1; // It begins. . .
20
21struct Kitty {
22  unsigned burrsInFur;
23
24  Kitty() {
25    burrsInFur = 0;
26  }
27
28  void wanderInYard(int hours) {
29    burrsInFur = hours*Weed::weedCount()/8;
30  }
31
32  void lick() {
33    if(burrsInFur) {
34      burrsInFur--;
35      Weed w;
36    }
37  }
38
39} Nion;
40
41void NionsDay(int hours) {
42  static Kitty Nion;
43  Nion.wanderInYard(hours);
44  while(Nion.burrsInFur) Nion.lick();
45}
46
47// CHECK:      define void @main()
48// CHECK-NEXT: entry:
49// Verify constructor is emitted
50// NOINLINE-NEXT: call void @_GLOBAL__sub_I_inline_constructors.hlsl()
51// NOINLINE-NEXT: %0 = call i32 @llvm.dx.flattened.thread.id.in.group()
52// NOINLINE-NEXT: call void @_Z4mainj(i32 %0)
53// Verify inlining leaves only calls to "llvm." intrinsics
54// INLINE-NOT:    call {{[^@]*}} @{{[^l][^l][^v][^m][^\.]}}
55// CHECK:         ret void
56[shader("compute")]
57[numthreads(1,1,1)]
58void main(unsigned GI : SV_GroupIndex) {
59  NionsDay(10);
60}
61
62
63// CHECK:      define void @rainyMain()
64// CHECK-NEXT: entry:
65// Verify constructor is emitted
66// NOINLINE-NEXT:   call void @_GLOBAL__sub_I_inline_constructors.hlsl()
67// NOINLINE-NEXT:   call void @_Z9rainyMainv()
68// Verify inlining leaves only calls to "llvm." intrinsics
69// INLINE-NOT:      call {{[^@]*}} @{{[^l][^l][^v][^m][^\.]}}
70// CHECK:           ret void
71[shader("compute")]
72[numthreads(1,1,1)]
73void rainyMain() {
74  NionsDay(1);
75}
76
77