| ; RUN: opt -S -mtriple=amdgcn-- -amdgpu-replace-lds-use-with-pointer -amdgpu-enable-lds-replace-with-pointer=true < %s | FileCheck %s |
| |
| ; DESCRIPTION: |
| ; |
| ; The lds global @lds_used_within_func is used within non-kernel function @func_uses_lds |
| ; which is recheable from kernel @kernel_reaches_lds, hence pointer replacement takes place |
| ; for @lds_used_within_func. |
| ; |
| |
| ; Original LDS should exist. |
| ; CHECK: @lds_used_within_func = internal addrspace(3) global [4 x i32] undef, align 4 |
| @lds_used_within_func = internal addrspace(3) global [4 x i32] undef, align 4 |
| |
| ; Pointer should be created. |
| ; CHECK: @lds_used_within_func.ptr = internal unnamed_addr addrspace(3) global i16 undef, align 2 |
| |
| ; Pointer replacement code should be added. |
| define internal void @func_uses_lds() { |
| ; CHECK-LABEL: entry: |
| ; CHECK: %0 = load i16, i16 addrspace(3)* @lds_used_within_func.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_func, i32 0, i32 0 |
| ret void |
| } |
| |
| ; No change |
| define internal void @func_does_not_use_lds_3() { |
| ; CHECK-LABEL: entry: |
| ; CHECK: call void @func_uses_lds() |
| ; CHECK: ret void |
| entry: |
| call void @func_uses_lds() |
| ret void |
| } |
| |
| ; No change |
| define internal void @func_does_not_use_lds_2() { |
| ; CHECK-LABEL: entry: |
| ; CHECK: call void @func_uses_lds() |
| ; CHECK: ret void |
| entry: |
| call void @func_uses_lds() |
| ret void |
| } |
| |
| ; No change |
| define internal void @func_does_not_use_lds_1() { |
| ; CHECK-LABEL: entry: |
| ; CHECK: call void @func_does_not_use_lds_2() |
| ; CHECK: call void @func_does_not_use_lds_3() |
| ; CHECK: ret void |
| entry: |
| call void @func_does_not_use_lds_2() |
| call void @func_does_not_use_lds_3() |
| ret void |
| } |
| |
| ; Pointer initialization code shoud be added |
| define protected amdgpu_kernel void @kernel_reaches_lds() { |
| ; 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_func to i16), i16 addrspace(3)* @lds_used_within_func.ptr, align 2 |
| ; CHECK: br label %3 |
| ; |
| ; CHECK-LABEL: 3: |
| ; CHECK: call void @llvm.amdgcn.wave.barrier() |
| ; CHECK: call void @func_does_not_use_lds_1() |
| ; CHECK: ret void |
| entry: |
| call void @func_does_not_use_lds_1() |
| ret void |
| } |
| |
| ; No change here since this kernel does not reach @func_uses_lds which uses lds. |
| define protected amdgpu_kernel void @kernel_does_not_reach_lds() { |
| ; CHECK-LABEL: entry: |
| ; CHECK: ret void |
| entry: |
| ret void |
| } |