1 ; RUN: opt -S -mtriple=amdgcn-- -amdgpu-replace-lds-use-with-pointer -amdgpu-enable-lds-replace-with-pointer=true < %s | FileCheck %s
5 ; There are three lds globals defined here, and these three lds are used respectively within
6 ; three non-kernel functions. There is one kernel which *indirectly* calls one of the non-kernel
7 ; functions. But since all the three non-kernel functions have same signature, all three
8 ; non-kernel functions are resolved as potential callees for indirect call-site. Hence we land-up
9 ; pointer replacement for three lds globals.
12 ; Original LDS should exist.
13 ; CHECK: @lds_used_within_function_1 = internal addrspace(3) global [4 x i32] undef, align 4
14 ; CHECK: @lds_used_within_function_2 = internal addrspace(3) global [4 x i32] undef, align 4
15 ; CHECK: @lds_used_within_function_3 = internal addrspace(3) global [4 x i32] undef, align 4
16 @lds_used_within_function_1 = internal addrspace(3) global [4 x i32] undef, align 4
17 @lds_used_within_function_2 = internal addrspace(3) global [4 x i32] undef, align 4
18 @lds_used_within_function_3 = internal addrspace(3) global [4 x i32] undef, align 4
20 ; Function pointers should exist.
21 ; CHECK: @ptr_to_func1 = internal local_unnamed_addr externally_initialized global void (i16)* @function_1, align 8
22 ; CHECK: @ptr_to_func2 = internal local_unnamed_addr externally_initialized global void (i16)* @function_2, align 8
23 ; CHECK: @ptr_to_func3 = internal local_unnamed_addr externally_initialized global void (i16)* @function_3, align 8
24 @ptr_to_func1 = internal local_unnamed_addr externally_initialized global void (i16)* @function_1, align 8
25 @ptr_to_func2 = internal local_unnamed_addr externally_initialized global void (i16)* @function_2, align 8
26 @ptr_to_func3 = internal local_unnamed_addr externally_initialized global void (i16)* @function_3, align 8
28 ; Pointers should be created.
29 ; CHECK: @lds_used_within_function_1.ptr = internal unnamed_addr addrspace(3) global i16 undef, align 2
30 ; CHECK: @lds_used_within_function_2.ptr = internal unnamed_addr addrspace(3) global i16 undef, align 2
31 ; CHECK: @lds_used_within_function_3.ptr = internal unnamed_addr addrspace(3) global i16 undef, align 2
33 ; Pointer replacement code should be added.
34 define internal void @function_3(i16 %i) {
36 ; CHECK: %0 = load i16, i16 addrspace(3)* @lds_used_within_function_3.ptr, align 2
37 ; CHECK: %1 = getelementptr i8, i8 addrspace(3)* null, i16 %0
38 ; CHECK: %2 = bitcast i8 addrspace(3)* %1 to [4 x i32] addrspace(3)*
39 ; CHECK: %gep = getelementptr inbounds [4 x i32], [4 x i32] addrspace(3)* %2, i32 0, i32 0
42 %gep = getelementptr inbounds [4 x i32], [4 x i32] addrspace(3)* @lds_used_within_function_3, i32 0, i32 0
46 ; Pointer replacement code should be added.
47 define internal void @function_2(i16 %i) {
49 ; CHECK: %0 = load i16, i16 addrspace(3)* @lds_used_within_function_2.ptr, align 2
50 ; CHECK: %1 = getelementptr i8, i8 addrspace(3)* null, i16 %0
51 ; CHECK: %2 = bitcast i8 addrspace(3)* %1 to [4 x i32] addrspace(3)*
52 ; CHECK: %gep = getelementptr inbounds [4 x i32], [4 x i32] addrspace(3)* %2, i32 0, i32 0
55 %gep = getelementptr inbounds [4 x i32], [4 x i32] addrspace(3)* @lds_used_within_function_2, i32 0, i32 0
59 ; Pointer replacement code should be added.
60 define internal void @function_1(i16 %i) {
62 ; CHECK: %0 = load i16, i16 addrspace(3)* @lds_used_within_function_1.ptr, align 2
63 ; CHECK: %1 = getelementptr i8, i8 addrspace(3)* null, i16 %0
64 ; CHECK: %2 = bitcast i8 addrspace(3)* %1 to [4 x i32] addrspace(3)*
65 ; CHECK: %gep = getelementptr inbounds [4 x i32], [4 x i32] addrspace(3)* %2, i32 0, i32 0
68 %gep = getelementptr inbounds [4 x i32], [4 x i32] addrspace(3)* @lds_used_within_function_1, i32 0, i32 0
72 ; Pointer initialization code shoud be added
73 define protected amdgpu_kernel void @kernel_indirectly_calls_function_1() {
75 ; CHECK: %0 = call i32 @llvm.amdgcn.mbcnt.lo(i32 -1, i32 0)
76 ; CHECK: %1 = icmp eq i32 %0, 0
77 ; CHECK: br i1 %1, label %2, label %3
80 ; 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
81 ; 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
82 ; 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
86 ; CHECK: call void @llvm.amdgcn.wave.barrier()
87 ; CHECK: %fptr1 = load void (i16)*, void (i16)** @ptr_to_func1, align 8
88 ; CHECK: call void %fptr1(i16 6)
91 %fptr1 = load void (i16)*, void (i16)** @ptr_to_func1, align 8
92 call void %fptr1(i16 6)