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; 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
}
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