llvm/test/CodeGen/SPIRV/transcoding/OpenCL/barrier.ll

   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 ;; barrier OpenCL C 1.2 built-in function [1] into corresponding SPIR-V
   6 ;; instruction.
   7
   8 ;; FIXME: Strictly speaking, this flag is not supported by barrier in OpenCL 1.2
   9 ;; #define CLK_IMAGE_MEM_FENCE 0x04
  10 ;;
  11 ;; void __attribute__((overloadable)) __attribute__((convergent)) barrier(cl_mem_fence_flags);
  12 ;;
  13 ;; __kernel void test_barrier_const_flags() {
  14 ;;   barrier(CLK_LOCAL_MEM_FENCE);
  15 ;;   barrier(CLK_GLOBAL_MEM_FENCE);
  16 ;;   barrier(CLK_IMAGE_MEM_FENCE);
  17 ;;
  18 ;;   barrier(CLK_LOCAL_MEM_FENCE | CLK_GLOBAL_MEM_FENCE);
  19 ;;   barrier(CLK_LOCAL_MEM_FENCE | CLK_IMAGE_MEM_FENCE);
  20 ;;   barrier(CLK_GLOBAL_MEM_FENCE | CLK_LOCAL_MEM_FENCE | CLK_IMAGE_MEM_FENCE);
  21 ;; }
  22 ;;
  23 ;; __kernel void test_barrier_non_const_flags(cl_mem_fence_flags flags) {
  24   ;; FIXME: OpenCL spec doesn't require flags to be compile-time known
  25   ;; barrier(flags);
  26 ;; }
  27
  28 ; CHECK-SPIRV: OpName %[[#TEST_CONST_FLAGS:]] "test_barrier_const_flags"
  29 ; CHECK-SPIRV: %[[#UINT:]] = OpTypeInt 32 0
  30
  31 ;; In SPIR-V, barrier is represented as OpControlBarrier [3] and OpenCL
  32 ;; cl_mem_fence_flags are represented as part of Memory Semantics [2], which
  33 ;; also includes memory order constraints. The backend applies some default
  34 ;; memory order for OpControlBarrier and therefore, constants below include a
  35 ;; bit more information than original source
  36
  37 ;; 0x10 SequentiallyConsistent + 0x100 WorkgroupMemory
  38 ; CHECK-SPIRV:     %[[#LOCAL:]] = OpConstant %[[#UINT]] 272
  39 ;; 0x2 Workgroup
  40 ; CHECK-SPIRV:     %[[#WG:]] = OpConstant %[[#UINT]] 2
  41 ;; 0x10 SequentiallyConsistent + 0x200 CrossWorkgroupMemory
  42 ; CHECK-SPIRV-DAG: %[[#GLOBAL:]] = OpConstant %[[#UINT]] 528
  43 ;; 0x10 SequentiallyConsistent + 0x800 ImageMemory
  44 ; CHECK-SPIRV-DAG: %[[#IMAGE:]] = OpConstant %[[#UINT]] 2064
  45 ;; 0x10 SequentiallyConsistent + 0x100 WorkgroupMemory + 0x200 CrossWorkgroupMemory
  46 ; CHECK-SPIRV-DAG: %[[#LOCAL_GLOBAL:]] = OpConstant %[[#UINT]] 784
  47 ;; 0x10 SequentiallyConsistent + 0x100 WorkgroupMemory + 0x800 ImageMemory
  48 ; CHECK-SPIRV-DAG: %[[#LOCAL_IMAGE:]] = OpConstant %[[#UINT]] 2320
  49 ;; 0x10 SequentiallyConsistent + 0x100 WorkgroupMemory + 0x200 CrossWorkgroupMemory + 0x800 ImageMemory
  50 ; CHECK-SPIRV-DAG: %[[#LOCAL_GLOBAL_IMAGE:]] = OpConstant %[[#UINT]] 2832
  51
  52 ; CHECK-SPIRV: %[[#TEST_CONST_FLAGS]] = OpFunction %[[#]]
  53 ; CHECK-SPIRV: OpControlBarrier %[[#WG]] %[[#WG]] %[[#LOCAL]]
  54 ; CHECK-SPIRV: OpControlBarrier %[[#WG]] %[[#WG]] %[[#GLOBAL]]
  55 ; CHECK-SPIRV: OpControlBarrier %[[#WG]] %[[#WG]] %[[#IMAGE]]
  56 ; CHECK-SPIRV: OpControlBarrier %[[#WG]] %[[#WG]] %[[#LOCAL_GLOBAL]]
  57 ; CHECK-SPIRV: OpControlBarrier %[[#WG]] %[[#WG]] %[[#LOCAL_IMAGE]]
  58 ; CHECK-SPIRV: OpControlBarrier %[[#WG]] %[[#WG]] %[[#LOCAL_GLOBAL_IMAGE]]
  59
  60 define dso_local spir_kernel void @test_barrier_const_flags() local_unnamed_addr {
  61 entry:
  62   tail call spir_func void @_Z7barrierj(i32 noundef 1)
  63   tail call spir_func void @_Z7barrierj(i32 noundef 2)
  64   tail call spir_func void @_Z7barrierj(i32 noundef 4)
  65   tail call spir_func void @_Z7barrierj(i32 noundef 3)
  66   tail call spir_func void @_Z7barrierj(i32 noundef 5)
  67   tail call spir_func void @_Z7barrierj(i32 noundef 7)
  68   ret void
  69 }
  70
  71 declare spir_func void @_Z7barrierj(i32 noundef) local_unnamed_addr
  72
  73 define dso_local spir_kernel void @test_barrier_non_const_flags(i32 noundef %flags) local_unnamed_addr {
  74 entry:
  75   ret void
  76 }
  77
  78 ;; References:
  79 ;; [1]: https://www.khronos.org/registry/OpenCL/sdk/1.2/docs/man/xhtml/barrier.html
  80 ;; [2]: https://www.khronos.org/registry/spir-v/specs/unified1/SPIRV.html#_a_id_memory_semantics__id_a_memory_semantics_lt_id_gt
  81 ;; [3]: https://www.khronos.org/registry/spir-v/specs/unified1/SPIRV.html#OpControlBarrier