96 lines
3.2 KiB
LLVM
96 lines
3.2 KiB
LLVM
; 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 *indirectly* recheable from kernel @kernel_reaches_lds, hence pointer replacement
|
|
; takes place for @lds_used_within_func.
|
|
|
|
; Original LDS should exit.
|
|
; 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
|
|
|
|
; Function pointer should exist as it is.
|
|
; CHECK: @ptr_to_func = internal local_unnamed_addr externally_initialized global void ()* @func_uses_lds, align 8
|
|
@ptr_to_func = internal local_unnamed_addr externally_initialized global void ()* @func_uses_lds, align 8
|
|
|
|
; 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: %fptr = load void ()*, void ()** @ptr_to_func, align 8
|
|
; CHECK: call void %fptr()
|
|
; CHECK: ret void
|
|
entry:
|
|
%fptr = load void ()*, void ()** @ptr_to_func, align 8
|
|
call void %fptr()
|
|
ret void
|
|
}
|
|
|
|
; No change
|
|
define internal void @func_does_not_use_lds_2() {
|
|
; CHECK-LABEL: entry:
|
|
; CHECK: %fptr = load void ()*, void ()** @ptr_to_func, align 8
|
|
; CHECK: call void %fptr()
|
|
; CHECK: ret void
|
|
entry:
|
|
%fptr = load void ()*, void ()** @ptr_to_func, align 8
|
|
call void %fptr()
|
|
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
|
|
}
|