1; RUN: llc -O0 -mtriple=spirv32-unknown-unknown %s -o - | FileCheck %s --check-prefix=CHECK-SPIRV 2; RUN: %if spirv-tools %{ llc -O0 -mtriple=spirv32-unknown-unknown %s -o - -filetype=obj | spirv-val %} 3 4;; This test checks that the backend is capable to correctly translate 5;; legacy atomic OpenCL C 1.2 built-in functions [1] into corresponding SPIR-V 6;; instruction. 7 8;; __kernel void test_legacy_atomics(__global int *p, int val) { 9;; atom_add(p, val); // from cl_khr_global_int32_base_atomics 10;; atomic_add(p, val); // from OpenCL C 1.1 11;; } 12 13; CHECK-SPIRV: OpName %[[#TEST:]] "test_legacy_atomics" 14; CHECK-SPIRV-DAG: %[[#UINT:]] = OpTypeInt 32 0 15; CHECK-SPIRV-DAG: %[[#UINT_PTR:]] = OpTypePointer CrossWorkgroup %[[#UINT]] 16 17;; In SPIR-V, atomic_add is represented as OpAtomicIAdd [2], which also includes 18;; memory scope and memory semantic arguments. The backend applies a default 19;; memory scope and memory order for it and therefore, constants below include 20;; a bit more information than original source 21 22;; 0x2 Workgroup 23; CHECK-SPIRV-DAG: %[[#WORKGROUP_SCOPE:]] = OpConstant %[[#UINT]] 2 24 25;; 0x0 Relaxed 26; CHECK-SPIRV-DAG: %[[#RELAXED:]] = OpConstant %[[#UINT]] 0 27 28; CHECK-SPIRV: %[[#TEST]] = OpFunction %[[#]] 29; CHECK-SPIRV: %[[#PTR:]] = OpFunctionParameter %[[#UINT_PTR]] 30; CHECK-SPIRV: %[[#VAL:]] = OpFunctionParameter %[[#UINT]] 31; CHECK-SPIRV: %[[#]] = OpAtomicIAdd %[[#UINT]] %[[#PTR]] %[[#WORKGROUP_SCOPE]] %[[#RELAXED]] %[[#VAL]] 32; CHECK-SPIRV: %[[#]] = OpAtomicIAdd %[[#UINT]] %[[#PTR]] %[[#WORKGROUP_SCOPE]] %[[#RELAXED]] %[[#VAL]] 33 34define dso_local spir_kernel void @test_legacy_atomics(i32 addrspace(1)* noundef %p, i32 noundef %val) local_unnamed_addr { 35entry: 36 %call = tail call spir_func i32 @_Z8atom_addPU3AS1Vii(i32 addrspace(1)* noundef %p, i32 noundef %val) 37 %call1 = tail call spir_func i32 @_Z10atomic_addPU3AS1Vii(i32 addrspace(1)* noundef %p, i32 noundef %val) 38 ret void 39} 40 41declare spir_func i32 @_Z8atom_addPU3AS1Vii(i32 addrspace(1)* noundef, i32 noundef) local_unnamed_addr 42 43declare spir_func i32 @_Z10atomic_addPU3AS1Vii(i32 addrspace(1)* noundef, i32 noundef) local_unnamed_addr 44 45;; References: 46;; [1]: https://www.khronos.org/registry/OpenCL/specs/3.0-unified/html/OpenCL_C.html#atomic-legacy 47;; [2]: https://www.khronos.org/registry/spir-v/specs/unified1/SPIRV.html#OpAtomicIAdd 48