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llvm-mirror/test/CodeGen/AMDGPU/lds-alignment.ll
hsmahesha 7520c18108 [AMDGPU] Increase alignment of LDS globals if necessary before LDS lowering. 
Before packing LDS globals into a sorted structure, make sure that
their alignment is properly updated based on their size. This will make
sure that the members of sorted structure are properly aligned, and
hence it will further reduce the probability of unaligned LDS access.

Reviewed By: rampitec

Differential Revision: https://reviews.llvm.org/D103261
2021-06-07 18:00:41 +05:30

258 lines
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LLVM
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; RUN: llc -march=amdgcn -mtriple=amdgcn-unknown-amdhsa --amdhsa-code-object-version=2 < %s | FileCheck -check-prefix=HSA %s
@lds.align16.0 = internal unnamed_addr addrspace(3) global [38 x i8] undef, align 16
@lds.align16.1 = internal unnamed_addr addrspace(3) global [38 x i8] undef, align 16
@lds.align8.0 = internal unnamed_addr addrspace(3) global [38 x i8] undef, align 8
@lds.align32.0 = internal unnamed_addr addrspace(3) global [38 x i8] undef, align 32
@lds.missing.align.0 = internal unnamed_addr addrspace(3) global [39 x i32] undef
@lds.missing.align.1 = internal unnamed_addr addrspace(3) global [7 x i64] undef
declare void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* nocapture, i8 addrspace(1)* nocapture readonly, i32, i1) #0
declare void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* nocapture, i8 addrspace(3)* nocapture readonly, i32, i1) #0
; HSA-LABEL: {{^}}test_no_round_size_1:
; HSA: workgroup_group_segment_byte_size = 38
define amdgpu_kernel void @test_no_round_size_1(i8 addrspace(1)* %out, i8 addrspace(1)* %in) #1 {
%lds.align16.0.bc = bitcast [38 x i8] addrspace(3)* @lds.align16.0 to i8 addrspace(3)*
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 4 %lds.align16.0.bc, i8 addrspace(1)* align 4 %in, i32 38, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 4 %out, i8 addrspace(3)* align 4 %lds.align16.0.bc, i32 38, i1 false)
ret void
}
; There are two objects, so one requires padding to be correctly
; aligned after the other.
; (38 -> 48) + 38 = 92
; I don't think it is necessary to add padding after since if there
; were to be a dynamically sized LDS kernel arg, the runtime should
; add the alignment padding if necessary alignment padding if needed.
; HSA-LABEL: {{^}}test_round_size_2:
; HSA: workgroup_group_segment_byte_size = 86
; HSA: group_segment_alignment = 4
define amdgpu_kernel void @test_round_size_2(i8 addrspace(1)* %out, i8 addrspace(1)* %in) #1 {
%lds.align16.0.bc = bitcast [38 x i8] addrspace(3)* @lds.align16.0 to i8 addrspace(3)*
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 4 %lds.align16.0.bc, i8 addrspace(1)* align 4 %in, i32 38, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 4 %out, i8 addrspace(3)* align 4 %lds.align16.0.bc, i32 38, i1 false)
%lds.align16.1.bc = bitcast [38 x i8] addrspace(3)* @lds.align16.1 to i8 addrspace(3)*
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 4 %lds.align16.1.bc, i8 addrspace(1)* align 4 %in, i32 38, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 4 %out, i8 addrspace(3)* align 4 %lds.align16.1.bc, i32 38, i1 false)
ret void
}
; 38 + (10 pad) + 38 (= 86)
; HSA-LABEL: {{^}}test_round_size_2_align_8:
; HSA: workgroup_group_segment_byte_size = 86
; HSA: group_segment_alignment = 4
define amdgpu_kernel void @test_round_size_2_align_8(i8 addrspace(1)* %out, i8 addrspace(1)* %in) #1 {
%lds.align16.0.bc = bitcast [38 x i8] addrspace(3)* @lds.align16.0 to i8 addrspace(3)*
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 8 %lds.align16.0.bc, i8 addrspace(1)* align 8 %in, i32 38, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 8 %out, i8 addrspace(3)* align 8 %lds.align16.0.bc, i32 38, i1 false)
%lds.align8.0.bc = bitcast [38 x i8] addrspace(3)* @lds.align8.0 to i8 addrspace(3)*
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 8 %lds.align8.0.bc, i8 addrspace(1)* align 8 %in, i32 38, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 8 %out, i8 addrspace(3)* align 8 %lds.align8.0.bc, i32 38, i1 false)
ret void
}
; HSA-LABEL: {{^}}test_round_local_lds_and_arg:
; HSA: workgroup_group_segment_byte_size = 38
; HSA: group_segment_alignment = 4
define amdgpu_kernel void @test_round_local_lds_and_arg(i8 addrspace(1)* %out, i8 addrspace(1)* %in, i8 addrspace(3)* %lds.arg) #1 {
%lds.align16.0.bc = bitcast [38 x i8] addrspace(3)* @lds.align16.0 to i8 addrspace(3)*
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 4 %lds.align16.0.bc, i8 addrspace(1)* align 4 %in, i32 38, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 4 %out, i8 addrspace(3)* align 4 %lds.align16.0.bc, i32 38, i1 false)
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 4 %lds.arg, i8 addrspace(1)* align 4 %in, i32 38, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 4 %out, i8 addrspace(3)* align 4 %lds.arg, i32 38, i1 false)
ret void
}
; HSA-LABEL: {{^}}test_round_lds_arg:
; HSA: workgroup_group_segment_byte_size = 0
; HSA: group_segment_alignment = 4
define amdgpu_kernel void @test_round_lds_arg(i8 addrspace(1)* %out, i8 addrspace(1)* %in, i8 addrspace(3)* %lds.arg) #1 {
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 4 %lds.arg, i8 addrspace(1)* align 4 %in, i32 38, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 4 %out, i8 addrspace(3)* align 4 %lds.arg, i32 38, i1 false)
ret void
}
; FIXME: Parameter alignment not considered
; HSA-LABEL: {{^}}test_high_align_lds_arg:
; HSA: workgroup_group_segment_byte_size = 0
; HSA: group_segment_alignment = 4
define amdgpu_kernel void @test_high_align_lds_arg(i8 addrspace(1)* %out, i8 addrspace(1)* %in, i8 addrspace(3)* align 64 %lds.arg) #1 {
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 64 %lds.arg, i8 addrspace(1)* align 64 %in, i32 38, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 64 %out, i8 addrspace(3)* align 64 %lds.arg, i32 38, i1 false)
ret void
}
; (39 * 4) + (4 pad) + (7 * 8) = 216
; HSA-LABEL: {{^}}test_missing_alignment_size_2_order0:
; HSA: workgroup_group_segment_byte_size = 216
; HSA: group_segment_alignment = 4
define amdgpu_kernel void @test_missing_alignment_size_2_order0(i8 addrspace(1)* %out, i8 addrspace(1)* %in) #1 {
%lds.missing.align.0.bc = bitcast [39 x i32] addrspace(3)* @lds.missing.align.0 to i8 addrspace(3)*
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 4 %lds.missing.align.0.bc, i8 addrspace(1)* align 4 %in, i32 160, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 4 %out, i8 addrspace(3)* align 4 %lds.missing.align.0.bc, i32 160, i1 false)
%lds.missing.align.1.bc = bitcast [7 x i64] addrspace(3)* @lds.missing.align.1 to i8 addrspace(3)*
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 8 %lds.missing.align.1.bc, i8 addrspace(1)* align 8 %in, i32 56, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 8 %out, i8 addrspace(3)* align 8 %lds.missing.align.1.bc, i32 56, i1 false)
ret void
}
; (39 * 4) + (4 pad) + (7 * 8) = 216
; HSA-LABEL: {{^}}test_missing_alignment_size_2_order1:
; HSA: workgroup_group_segment_byte_size = 216
; HSA: group_segment_alignment = 4
define amdgpu_kernel void @test_missing_alignment_size_2_order1(i8 addrspace(1)* %out, i8 addrspace(1)* %in) #1 {
%lds.missing.align.1.bc = bitcast [7 x i64] addrspace(3)* @lds.missing.align.1 to i8 addrspace(3)*
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 8 %lds.missing.align.1.bc, i8 addrspace(1)* align 8 %in, i32 56, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 8 %out, i8 addrspace(3)* align 8 %lds.missing.align.1.bc, i32 56, i1 false)
%lds.missing.align.0.bc = bitcast [39 x i32] addrspace(3)* @lds.missing.align.0 to i8 addrspace(3)*
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 4 %lds.missing.align.0.bc, i8 addrspace(1)* align 4 %in, i32 160, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 4 %out, i8 addrspace(3)* align 4 %lds.missing.align.0.bc, i32 160, i1 false)
ret void
}
; align 32, 16, 16
; 38 + (10 pad) + 38 + (10 pad) + 38 ( = 134)
; HSA-LABEL: {{^}}test_round_size_3_order0:
; HSA: workgroup_group_segment_byte_size = 134
; HSA: group_segment_alignment = 4
define amdgpu_kernel void @test_round_size_3_order0(i8 addrspace(1)* %out, i8 addrspace(1)* %in) #1 {
%lds.align32.0.bc = bitcast [38 x i8] addrspace(3)* @lds.align32.0 to i8 addrspace(3)*
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 8 %lds.align32.0.bc, i8 addrspace(1)* align 8 %in, i32 38, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 8 %out, i8 addrspace(3)* align 8 %lds.align32.0.bc, i32 38, i1 false)
%lds.align16.0.bc = bitcast [38 x i8] addrspace(3)* @lds.align16.0 to i8 addrspace(3)*
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 8 %lds.align16.0.bc, i8 addrspace(1)* align 8 %in, i32 38, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 8 %out, i8 addrspace(3)* align 8 %lds.align16.0.bc, i32 38, i1 false)
%lds.align8.0.bc = bitcast [38 x i8] addrspace(3)* @lds.align8.0 to i8 addrspace(3)*
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 8 %lds.align8.0.bc, i8 addrspace(1)* align 8 %in, i32 38, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 8 %out, i8 addrspace(3)* align 8 %lds.align8.0.bc, i32 38, i1 false)
ret void
}
; align 32, 16, 16
; 38 (+ 10 pad) + 38 + (10 pad) + 38 ( = 134)
; HSA-LABEL: {{^}}test_round_size_3_order1:
; HSA: workgroup_group_segment_byte_size = 134
; HSA: group_segment_alignment = 4
define amdgpu_kernel void @test_round_size_3_order1(i8 addrspace(1)* %out, i8 addrspace(1)* %in) #1 {
%lds.align32.0.bc = bitcast [38 x i8] addrspace(3)* @lds.align32.0 to i8 addrspace(3)*
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 8 %lds.align32.0.bc, i8 addrspace(1)* align 8 %in, i32 38, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 8 %out, i8 addrspace(3)* align 8 %lds.align32.0.bc, i32 38, i1 false)
%lds.align8.0.bc = bitcast [38 x i8] addrspace(3)* @lds.align8.0 to i8 addrspace(3)*
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 8 %lds.align8.0.bc, i8 addrspace(1)* align 8 %in, i32 38, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 8 %out, i8 addrspace(3)* align 8 %lds.align8.0.bc, i32 38, i1 false)
%lds.align16.0.bc = bitcast [38 x i8] addrspace(3)* @lds.align16.0 to i8 addrspace(3)*
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 8 %lds.align16.0.bc, i8 addrspace(1)* align 8 %in, i32 38, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 8 %out, i8 addrspace(3)* align 8 %lds.align16.0.bc, i32 38, i1 false)
ret void
}
; align 32, 16, 16
; 38 + (10 pad) + 38 + (10 pad) + 38 ( = 126)
; HSA-LABEL: {{^}}test_round_size_3_order2:
; HSA: workgroup_group_segment_byte_size = 134
; HSA: group_segment_alignment = 4
define amdgpu_kernel void @test_round_size_3_order2(i8 addrspace(1)* %out, i8 addrspace(1)* %in) #1 {
%lds.align16.0.bc = bitcast [38 x i8] addrspace(3)* @lds.align16.0 to i8 addrspace(3)*
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 8 %lds.align16.0.bc, i8 addrspace(1)* align 8 %in, i32 38, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 8 %out, i8 addrspace(3)* align 8 %lds.align16.0.bc, i32 38, i1 false)
%lds.align32.0.bc = bitcast [38 x i8] addrspace(3)* @lds.align32.0 to i8 addrspace(3)*
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 8 %lds.align32.0.bc, i8 addrspace(1)* align 8 %in, i32 38, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 8 %out, i8 addrspace(3)* align 8 %lds.align32.0.bc, i32 38, i1 false)
%lds.align8.0.bc = bitcast [38 x i8] addrspace(3)* @lds.align8.0 to i8 addrspace(3)*
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 8 %lds.align8.0.bc, i8 addrspace(1)* align 8 %in, i32 38, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 8 %out, i8 addrspace(3)* align 8 %lds.align8.0.bc, i32 38, i1 false)
ret void
}
; align 32, 16, 16
; 38 + (10 pad) + 38 + (10 pad) + 38 ( = 134)
; HSA-LABEL: {{^}}test_round_size_3_order3:
; HSA: workgroup_group_segment_byte_size = 134
; HSA: group_segment_alignment = 4
define amdgpu_kernel void @test_round_size_3_order3(i8 addrspace(1)* %out, i8 addrspace(1)* %in) #1 {
%lds.align16.0.bc = bitcast [38 x i8] addrspace(3)* @lds.align16.0 to i8 addrspace(3)*
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 8 %lds.align16.0.bc, i8 addrspace(1)* align 8 %in, i32 38, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 8 %out, i8 addrspace(3)* align 8 %lds.align16.0.bc, i32 38, i1 false)
%lds.align8.0.bc = bitcast [38 x i8] addrspace(3)* @lds.align8.0 to i8 addrspace(3)*
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 8 %lds.align8.0.bc, i8 addrspace(1)* align 8 %in, i32 38, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 8 %out, i8 addrspace(3)* align 8 %lds.align8.0.bc, i32 38, i1 false)
%lds.align32.0.bc = bitcast [38 x i8] addrspace(3)* @lds.align32.0 to i8 addrspace(3)*
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 8 %lds.align32.0.bc, i8 addrspace(1)* align 8 %in, i32 38, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 8 %out, i8 addrspace(3)* align 8 %lds.align32.0.bc, i32 38, i1 false)
ret void
}
; align 32, 16, 16
; 38 + (10 pad) + 38 + (10 pad) + 38 (= 134)
; HSA-LABEL: {{^}}test_round_size_3_order4:
; HSA: workgroup_group_segment_byte_size = 134
; HSA: group_segment_alignment = 4
define amdgpu_kernel void @test_round_size_3_order4(i8 addrspace(1)* %out, i8 addrspace(1)* %in) #1 {
%lds.align8.0.bc = bitcast [38 x i8] addrspace(3)* @lds.align8.0 to i8 addrspace(3)*
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 8 %lds.align8.0.bc, i8 addrspace(1)* align 8 %in, i32 38, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 8 %out, i8 addrspace(3)* align 8 %lds.align8.0.bc, i32 38, i1 false)
%lds.align32.0.bc = bitcast [38 x i8] addrspace(3)* @lds.align32.0 to i8 addrspace(3)*
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 8 %lds.align32.0.bc, i8 addrspace(1)* align 8 %in, i32 38, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 8 %out, i8 addrspace(3)* align 8 %lds.align32.0.bc, i32 38, i1 false)
%lds.align16.0.bc = bitcast [38 x i8] addrspace(3)* @lds.align16.0 to i8 addrspace(3)*
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 8 %lds.align16.0.bc, i8 addrspace(1)* align 8 %in, i32 38, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 8 %out, i8 addrspace(3)* align 8 %lds.align16.0.bc, i32 38, i1 false)
ret void
}
; align 32, 16, 16
; 38 + (10 pad) + 38 + (10 pad) + 38 (= 134)
; HSA-LABEL: {{^}}test_round_size_3_order5:
; HSA: workgroup_group_segment_byte_size = 134
; HSA: group_segment_alignment = 4
define amdgpu_kernel void @test_round_size_3_order5(i8 addrspace(1)* %out, i8 addrspace(1)* %in) #1 {
%lds.align8.0.bc = bitcast [38 x i8] addrspace(3)* @lds.align8.0 to i8 addrspace(3)*
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 8 %lds.align8.0.bc, i8 addrspace(1)* align 8 %in, i32 38, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 8 %out, i8 addrspace(3)* align 8 %lds.align8.0.bc, i32 38, i1 false)
%lds.align16.0.bc = bitcast [38 x i8] addrspace(3)* @lds.align16.0 to i8 addrspace(3)*
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 8 %lds.align16.0.bc, i8 addrspace(1)* align 8 %in, i32 38, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 8 %out, i8 addrspace(3)* align 8 %lds.align16.0.bc, i32 38, i1 false)
%lds.align32.0.bc = bitcast [38 x i8] addrspace(3)* @lds.align32.0 to i8 addrspace(3)*
call void @llvm.memcpy.p3i8.p1i8.i32(i8 addrspace(3)* align 8 %lds.align32.0.bc, i8 addrspace(1)* align 8 %in, i32 38, i1 false)
call void @llvm.memcpy.p1i8.p3i8.i32(i8 addrspace(1)* align 8 %out, i8 addrspace(3)* align 8 %lds.align32.0.bc, i32 38, i1 false)
ret void
}
attributes #0 = { argmemonly nounwind }
attributes #1 = { nounwind }
attributes #2 = { convergent nounwind }
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