[AMDGPU] Add a new builtin type for image descriptor rsrc (#160258)

Adding a new builtin type for AMDGPU's image descriptor rsrc data type

This requires for llvm/llvm-project#140210

Author: ranapratap55

clang/include/clang/Basic/AMDGPUTypes.def

@@ -21,6 +21,7 @@
 #endif
 
 AMDGPU_OPAQUE_PTR_TYPE("__amdgpu_buffer_rsrc_t", AMDGPUBufferRsrc, AMDGPUBufferRsrcTy, 128, 128, 8)
+AMDGPU_OPAQUE_PTR_TYPE("__amdgpu_texture_t", AMDGPUTexture, AMDGPUTextureTy, 256, 256, 0)
 
 AMDGPU_NAMED_BARRIER_TYPE("__amdgpu_named_workgroup_barrier_t", AMDGPUNamedWorkgroupBarrier, AMDGPUNamedWorkgroupBarrierTy, 128, 32, 0)
 

clang/include/clang/Basic/Builtins.def

@@ -34,6 +34,7 @@
 //  Q -> target builtin type, followed by a character to distinguish the builtin type
 //    Qa -> AArch64 svcount_t builtin type.
 //    Qb -> AMDGPU __amdgpu_buffer_rsrc_t builtin type.
+//    Qt -> AMDGPU __amdgpu_texture_t builtin type.
 //  E -> ext_vector, followed by the number of elements and the base type.
 //  X -> _Complex, followed by the base type.
 //  Y -> ptrdiff_t

clang/lib/AST/ASTContext.cpp

@@ -12590,6 +12590,10 @@ static QualType DecodeTypeFromStr(const char *&Str, const ASTContext &Context,
       Type = Context.AMDGPUBufferRsrcTy;
       break;
     }
+    case 't': {
+      Type = Context.AMDGPUTextureTy;
+      break;
+    }
     default:
       llvm_unreachable("Unexpected target builtin type");
     }

clang/test/CodeGen/amdgpu-image-rsrc-type-debug-info.c

@@ -0,0 +1,17 @@
+// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --version 5
+// REQUIRES: amdgpu-registered-target
+// RUN: %clang_cc1 -triple amdgcn -emit-llvm -o - %s -debug-info-kind=limited | FileCheck %s
+
+// CHECK-LABEL: define dso_local void @test_locals(
+// CHECK-SAME: ) #[[ATTR0:[0-9]+]] !dbg [[DBG6:![0-9]+]] {
+// CHECK-NEXT:  [[ENTRY:.*:]]
+// CHECK-NEXT:    [[IMG:%.*]] = alloca ptr, align 32, addrspace(5)
+// CHECK-NEXT:    [[IMG_ASCAST:%.*]] = addrspacecast ptr addrspace(5) [[IMG]] to ptr
+// CHECK-NEXT:      #dbg_declare(ptr addrspace(5) [[IMG]], [[META11:![0-9]+]], !DIExpression(DW_OP_constu, 1, DW_OP_swap, DW_OP_xderef), [[META14:![0-9]+]])
+// CHECK-NEXT:    [[TMP0:%.*]] = load ptr, ptr [[IMG_ASCAST]], align 32, !dbg [[DBG15:![0-9]+]]
+// CHECK-NEXT:    ret void, !dbg [[DBG16:![0-9]+]]
+//
+void test_locals(void) {
+  __amdgpu_texture_t img;
+  (void)img;
+}

clang/test/CodeGenCXX/amdgpu-image-rsrc-typeinfo.cpp

@@ -0,0 +1,7 @@
+// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --version 5
+// REQUIRES: amdgpu-registered-target
+// RUN: %clang_cc1 -triple amdgcn %s -emit-llvm -o - | FileCheck %s
+namespace std { class type_info; }
+auto &a = typeid(__amdgpu_texture_t);
+//// NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
+// CHECK: {{.*}}

clang/test/SemaCXX/amdgpu-image-rsrc.cpp

@@ -0,0 +1,17 @@
+// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --version 5
+// REQUIRES: amdgpu-registered-target
+// RUN: %clang_cc1 -fsyntax-only -verify -std=gnu++11 -triple amdgcn -Wno-unused-value %s
+
+void foo() {
+  int n = 100;
+  __amdgpu_texture_t v = 0;           // expected-error {{cannot initialize a variable of type '__amdgpu_texture_t' with an rvalue of type 'int'}}
+  static_cast<__amdgpu_texture_t>(n);  // expected-error {{static_cast from 'int' to '__amdgpu_texture_t' is not allowed}}
+  reinterpret_cast<__amdgpu_texture_t>(n); // expected-error {{reinterpret_cast from 'int' to '__amdgpu_texture_t' is not allowed}}
+  (void)(v + v); // expected-error {{invalid operands to binary expression ('__amdgpu_texture_t' and '__amdgpu_texture_t')}}
+  int x(v);      // expected-error {{cannot initialize a variable of type 'int' with an lvalue of type '__amdgpu_texture_t'}}
+  __amdgpu_texture_t k;
+}
+
+template<class T> void bar(T);
+void use(__amdgpu_texture_t r) { bar(r); }
+struct S { __amdgpu_texture_t r; int a; };

clang/test/SemaOpenCL/amdgpu-image-rsrc.cl

@@ -0,0 +1,13 @@
+// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --version 5
+// REQUIRES: amdgpu-registered-target
+// RUN: %clang_cc1 -verify -cl-std=CL1.2 -triple amdgcn-amd-amdhsa %s
+// RUN: %clang_cc1 -verify -cl-std=CL2.0 -triple amdgcn-amd-amdhsa %s
+
+void f() {
+    int n = 3;
+    __amdgpu_texture_t v = (__amdgpu_texture_t)0; // expected-error {{used type '__amdgpu_texture_t' where arithmetic or pointer type is required}}
+    int k = v;          // expected-error {{initializing '__private int' with an expression of incompatible type '__private __amdgpu_texture_t'}}
+    (void)(v + v);      // expected-error {{invalid operands}}
+    __amdgpu_texture_t r;
+    int *p = (int*)r;   // expected-error {{operand of type '__amdgpu_texture_t' where arithmetic or pointer type is required}}
+}

clang/test/SemaOpenMP/amdgpu-image-rsrc.cpp

@@ -0,0 +1,12 @@
+// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --version 5
+// REQUIRES: amdgpu-registered-target
+// RUN: %clang_cc1 -verify -fopenmp -fopenmp-targets=amdgcn-amd-amdhsa -triple amdgcn-amd-amdhsa -fopenmp-is-target-device -Wno-unused-value %s
+
+void foo() {
+#pragma omp target
+  {
+    int n = 5;
+    __amdgpu_texture_t v = 0; // expected-error {{cannot initialize a variable of type '__amdgpu_texture_t' with an rvalue of type 'int'}}
+    (void)(v + v);            // expected-error {{invalid operands to binary expression}}
+  }
+}