| ; RUN: opt -S -mtriple=amdgcn-- -amdgpu-replace-lds-use-with-pointer -amdgpu-enable-lds-replace-with-pointer=true < %s | FileCheck %s |
| |
| ; DESCRIPTION: |
| ; |
| ; There are three lds globals defined here, and these three lds are used respectively within |
| ; three non-kernel functions. There is one kernel which *indirectly* calls one of the non-kernel |
| ; functions. But since all the three non-kernel functions have same signature, all three |
| ; non-kernel functions are resolved as potential callees for indirect call-site. Hence we land-up |
| ; pointer replacement for three lds globals. |
| ; |
| |
| ; Original LDS should exist. |
| ; CHECK: @lds_used_within_function_1 = internal addrspace(3) global [4 x i32] undef, align 4 |
| ; CHECK: @lds_used_within_function_2 = internal addrspace(3) global [4 x i32] undef, align 4 |
| ; CHECK: @lds_used_within_function_3 = internal addrspace(3) global [4 x i32] undef, align 4 |
| @lds_used_within_function_1 = internal addrspace(3) global [4 x i32] undef, align 4 |
| @lds_used_within_function_2 = internal addrspace(3) global [4 x i32] undef, align 4 |
| @lds_used_within_function_3 = internal addrspace(3) global [4 x i32] undef, align 4 |
| |
| ; Function pointers should exist. |
| ; CHECK: @ptr_to_func1 = internal local_unnamed_addr externally_initialized global void (i16)* @function_1, align 8 |
| ; CHECK: @ptr_to_func2 = internal local_unnamed_addr externally_initialized global void (i16)* @function_2, align 8 |
| ; CHECK: @ptr_to_func3 = internal local_unnamed_addr externally_initialized global void (i16)* @function_3, align 8 |
| @ptr_to_func1 = internal local_unnamed_addr externally_initialized global void (i16)* @function_1, align 8 |
| @ptr_to_func2 = internal local_unnamed_addr externally_initialized global void (i16)* @function_2, align 8 |
| @ptr_to_func3 = internal local_unnamed_addr externally_initialized global void (i16)* @function_3, align 8 |
| |
| ; Pointers should be created. |
| ; CHECK: @lds_used_within_function_1.ptr = internal unnamed_addr addrspace(3) global i16 undef, align 2 |
| ; CHECK: @lds_used_within_function_2.ptr = internal unnamed_addr addrspace(3) global i16 undef, align 2 |
| ; CHECK: @lds_used_within_function_3.ptr = internal unnamed_addr addrspace(3) global i16 undef, align 2 |
| |
| ; Pointer replacement code should be added. |
| define internal void @function_3(i16 %i) { |
| ; CHECK-LABEL: entry: |
| ; CHECK: %0 = load i16, i16 addrspace(3)* @lds_used_within_function_3.ptr, align 2 |
| ; CHECK: %1 = getelementptr i8, i8 addrspace(3)* null, i16 %0 |
| ; CHECK: %2 = bitcast i8 addrspace(3)* %1 to [4 x i32] addrspace(3)* |
| ; CHECK: %gep = getelementptr inbounds [4 x i32], [4 x i32] addrspace(3)* %2, i32 0, i32 0 |
| ; CHECK: ret void |
| entry: |
| %gep = getelementptr inbounds [4 x i32], [4 x i32] addrspace(3)* @lds_used_within_function_3, i32 0, i32 0 |
| ret void |
| } |
| |
| ; Pointer replacement code should be added. |
| define internal void @function_2(i16 %i) { |
| ; CHECK-LABEL: entry: |
| ; CHECK: %0 = load i16, i16 addrspace(3)* @lds_used_within_function_2.ptr, align 2 |
| ; CHECK: %1 = getelementptr i8, i8 addrspace(3)* null, i16 %0 |
| ; CHECK: %2 = bitcast i8 addrspace(3)* %1 to [4 x i32] addrspace(3)* |
| ; CHECK: %gep = getelementptr inbounds [4 x i32], [4 x i32] addrspace(3)* %2, i32 0, i32 0 |
| ; CHECK: ret void |
| entry: |
| %gep = getelementptr inbounds [4 x i32], [4 x i32] addrspace(3)* @lds_used_within_function_2, i32 0, i32 0 |
| ret void |
| } |
| |
| ; Pointer replacement code should be added. |
| define internal void @function_1(i16 %i) { |
| ; CHECK-LABEL: entry: |
| ; CHECK: %0 = load i16, i16 addrspace(3)* @lds_used_within_function_1.ptr, align 2 |
| ; CHECK: %1 = getelementptr i8, i8 addrspace(3)* null, i16 %0 |
| ; CHECK: %2 = bitcast i8 addrspace(3)* %1 to [4 x i32] addrspace(3)* |
| ; CHECK: %gep = getelementptr inbounds [4 x i32], [4 x i32] addrspace(3)* %2, i32 0, i32 0 |
| ; CHECK: ret void |
| entry: |
| %gep = getelementptr inbounds [4 x i32], [4 x i32] addrspace(3)* @lds_used_within_function_1, i32 0, i32 0 |
| ret void |
| } |
| |
| ; Pointer initialization code shoud be added |
| define protected amdgpu_kernel void @kernel_indirectly_calls_function_1() { |
| ; CHECK-LABEL: entry: |
| ; CHECK: %0 = call i32 @llvm.amdgcn.mbcnt.lo(i32 -1, i32 0) |
| ; CHECK: %1 = icmp eq i32 %0, 0 |
| ; CHECK: br i1 %1, label %2, label %3 |
| ; |
| ; CHECK-LABEL: 2: |
| ; CHECK: store i16 ptrtoint ([4 x i32] addrspace(3)* @lds_used_within_function_3 to i16), i16 addrspace(3)* @lds_used_within_function_3.ptr, align 2 |
| ; CHECK: store i16 ptrtoint ([4 x i32] addrspace(3)* @lds_used_within_function_2 to i16), i16 addrspace(3)* @lds_used_within_function_2.ptr, align 2 |
| ; CHECK: store i16 ptrtoint ([4 x i32] addrspace(3)* @lds_used_within_function_1 to i16), i16 addrspace(3)* @lds_used_within_function_1.ptr, align 2 |
| ; CHECK: br label %3 |
| ; |
| ; CHECK-LABEL: 3: |
| ; CHECK: call void @llvm.amdgcn.wave.barrier() |
| ; CHECK: %fptr1 = load void (i16)*, void (i16)** @ptr_to_func1, align 8 |
| ; CHECK: call void %fptr1(i16 6) |
| ; CHECK: ret void |
| entry: |
| %fptr1 = load void (i16)*, void (i16)** @ptr_to_func1, align 8 |
| call void %fptr1(i16 6) |
| ret void |
| } |