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clang-p2996/llvm/test/CodeGen/AMDGPU/occupancy-levels.ll
Matt Arsenault 4b47213951 AMDGPU: Switch backend default max workgroup size to 1024 
Previously this would default to 256, not the maximum supported size
of 1024. Using a maximum lower than the hardware maximum requires
language runtimes to enforce this limit for correctness, which no
language has correctly done. Switch the default to the conservatively
correct maximum, and force frontends to opt-in to the more optimal 256
default maximum.

I don't really understand why the changes in occupancy-levels.ll
increased the computed occupancy, which I expected to decrease. I'm
not sure if these tests should be forcing the old maximum.
2019-11-13 07:11:02 +05:30

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; RUN: llc -march=amdgcn -mcpu=gfx900 < %s | FileCheck --check-prefixes=GCN,GFX9 %s
; RUN: llc -march=amdgcn -mcpu=gfx1010 < %s | FileCheck --check-prefixes=GCN,GFX1010,GFX1010W32 %s
; RUN: llc -march=amdgcn -mcpu=gfx1010 -mattr=+wavefrontsize64 < %s | FileCheck --check-prefixes=GCN,GFX1010,GFX1010W64 %s
; GCN-LABEL: {{^}}max_occupancy:
; GFX9: ; Occupancy: 10
; GFX1010: ; Occupancy: 20
define amdgpu_kernel void @max_occupancy() {
ret void
}
; GCN-LABEL: {{^}}limited_occupancy_3:
; GFX9: ; Occupancy: 3
; GFX1010W64: ; Occupancy: 3
; GFX1010W32: ; Occupancy: 4
define amdgpu_kernel void @limited_occupancy_3() #0 {
ret void
}
; GCN-LABEL: {{^}}limited_occupancy_18:
; GFX9: ; Occupancy: 10
; GFX1010: ; Occupancy: 18
define amdgpu_kernel void @limited_occupancy_18() #1 {
ret void
}
; GCN-LABEL: {{^}}limited_occupancy_19:
; GFX9: ; Occupancy: 10
; GFX1010: ; Occupancy: 18
define amdgpu_kernel void @limited_occupancy_19() #2 {
ret void
}
; GCN-LABEL: {{^}}used_24_vgprs:
; GFX9: ; Occupancy: 10
; GFX1010: ; Occupancy: 20
define amdgpu_kernel void @used_24_vgprs() {
call void asm sideeffect "", "~{v23}" ()
ret void
}
; GCN-LABEL: {{^}}used_28_vgprs:
; GFX9: ; Occupancy: 9
; GFX1010W64: ; Occupancy: 18
; GFX1010W32: ; Occupancy: 20
define amdgpu_kernel void @used_28_vgprs() {
call void asm sideeffect "", "~{v27}" ()
ret void
}
; GCN-LABEL: {{^}}used_32_vgprs:
; GFX9: ; Occupancy: 8
; GFX1010W64: ; Occupancy: 16
; GFX1010W32: ; Occupancy: 20
define amdgpu_kernel void @used_32_vgprs() {
call void asm sideeffect "", "~{v31}" ()
ret void
}
; GCN-LABEL: {{^}}used_36_vgprs:
; GFX9: ; Occupancy: 7
; GFX1010W64: ; Occupancy: 14
; GFX1010W32: ; Occupancy: 20
define amdgpu_kernel void @used_36_vgprs() {
call void asm sideeffect "", "~{v35}" ()
ret void
}
; GCN-LABEL: {{^}}used_40_vgprs:
; GFX9: ; Occupancy: 6
; GFX1010W64: ; Occupancy: 12
; GFX1010W32: ; Occupancy: 20
define amdgpu_kernel void @used_40_vgprs() {
call void asm sideeffect "", "~{v39}" ()
ret void
}
; GCN-LABEL: {{^}}used_44_vgprs:
; GFX9: ; Occupancy: 5
; GFX1010W64: ; Occupancy: 11
; GFX1010W32: ; Occupancy: 20
define amdgpu_kernel void @used_44_vgprs() {
call void asm sideeffect "", "~{v43}" ()
ret void
}
; GCN-LABEL: {{^}}used_48_vgprs:
; GFX9: ; Occupancy: 5
; GFX1010W64: ; Occupancy: 10
; GFX1010W32: ; Occupancy: 20
define amdgpu_kernel void @used_48_vgprs() {
call void asm sideeffect "", "~{v47}" ()
ret void
}
; GCN-LABEL: {{^}}used_56_vgprs:
; GFX9: ; Occupancy: 4
; GFX1010W64: ; Occupancy: 9
; GFX1010W32: ; Occupancy: 18
define amdgpu_kernel void @used_56_vgprs() {
call void asm sideeffect "", "~{v55}" ()
ret void
}
; GCN-LABEL: {{^}}used_64_vgprs:
; GFX9: ; Occupancy: 4
; GFX1010W64: ; Occupancy: 8
; GFX1010W32: ; Occupancy: 16
define amdgpu_kernel void @used_64_vgprs() {
call void asm sideeffect "", "~{v63}" ()
ret void
}
; GCN-LABEL: {{^}}used_72_vgprs:
; GFX9: ; Occupancy: 3
; GFX1010W64: ; Occupancy: 7
; GFX1010W32: ; Occupancy: 14
define amdgpu_kernel void @used_72_vgprs() {
call void asm sideeffect "", "~{v71}" ()
ret void
}
; GCN-LABEL: {{^}}used_80_vgprs:
; GFX9: ; Occupancy: 3
; GFX1010W64: ; Occupancy: 6
; GFX1010W32: ; Occupancy: 12
define amdgpu_kernel void @used_80_vgprs() {
call void asm sideeffect "", "~{v79}" ()
ret void
}
; GCN-LABEL: {{^}}used_84_vgprs:
; GFX9: ; Occupancy: 3
; GFX1010W64: ; Occupancy: 6
; GFX1010W32: ; Occupancy: 11
define amdgpu_kernel void @used_84_vgprs() {
call void asm sideeffect "", "~{v83}" ()
ret void
}
; GCN-LABEL: {{^}}used_88_vgprs:
; GFX9: ; Occupancy: 2
; GFX1010W64: ; Occupancy: 5
; GFX1010W32: ; Occupancy: 11
define amdgpu_kernel void @used_88_vgprs() {
call void asm sideeffect "", "~{v87}" ()
ret void
}
; GCN-LABEL: {{^}}used_96_vgprs:
; GFX9: ; Occupancy: 2
; GFX1010W64: ; Occupancy: 5
; GFX1010W32: ; Occupancy: 10
define amdgpu_kernel void @used_96_vgprs() {
call void asm sideeffect "", "~{v95}" ()
ret void
}
; GCN-LABEL: {{^}}used_100_vgprs:
; GFX9: ; Occupancy: 2
; GFX1010W64: ; Occupancy: 5
; GFX1010W32: ; Occupancy: 9
define amdgpu_kernel void @used_100_vgprs() {
call void asm sideeffect "", "~{v99}" ()
ret void
}
; GCN-LABEL: {{^}}used_112_vgprs:
; GFX9: ; Occupancy: 2
; GFX1010W64: ; Occupancy: 4
; GFX1010W32: ; Occupancy: 9
define amdgpu_kernel void @used_112_vgprs() {
call void asm sideeffect "", "~{v111}" ()
ret void
}
; GCN-LABEL: {{^}}used_128_vgprs:
; GFX9: ; Occupancy: 2
; GFX1010W64: ; Occupancy: 4
; GFX1010W32: ; Occupancy: 8
define amdgpu_kernel void @used_128_vgprs() {
call void asm sideeffect "", "~{v127}" ()
ret void
}
; GCN-LABEL: {{^}}used_144_vgprs:
; GFX9: ; Occupancy: 1
; GFX1010W64: ; Occupancy: 3
; GFX1010W32: ; Occupancy: 7
define amdgpu_kernel void @used_144_vgprs() {
call void asm sideeffect "", "~{v143}" ()
ret void
}
; GCN-LABEL: {{^}}used_168_vgprs:
; GFX9: ; Occupancy: 1
; GFX1010W64: ; Occupancy: 3
; GFX1010W32: ; Occupancy: 6
define amdgpu_kernel void @used_168_vgprs() {
call void asm sideeffect "", "~{v167}" ()
ret void
}
; GCN-LABEL: {{^}}used_200_vgprs:
; GFX9: ; Occupancy: 1
; GFX1010W64: ; Occupancy: 2
; GFX1010W32: ; Occupancy: 5
define amdgpu_kernel void @used_200_vgprs() {
call void asm sideeffect "", "~{v199}" ()
ret void
}
; GCN-LABEL: {{^}}used_256_vgprs:
; GFX9: ; Occupancy: 1
; GFX1010W64: ; Occupancy: 2
; GFX1010W32: ; Occupancy: 4
define amdgpu_kernel void @used_256_vgprs() {
call void asm sideeffect "", "~{v255}" ()
ret void
}
; GCN-LABEL: {{^}}used_80_sgprs:
; GFX9: ; Occupancy: 10
; GFX1010: ; Occupancy: 20
define amdgpu_kernel void @used_80_sgprs() {
call void asm sideeffect "", "~{s79}" ()
ret void
}
; GCN-LABEL: {{^}}used_88_sgprs:
; GFX9: ; Occupancy: 9
; GFX1010: ; Occupancy: 20
define amdgpu_kernel void @used_88_sgprs() {
call void asm sideeffect "", "~{s87}" ()
ret void
}
; GCN-LABEL: {{^}}used_100_sgprs:
; GFX9: ; Occupancy: 8
; GFX1010: ; Occupancy: 20
define amdgpu_kernel void @used_100_sgprs() {
call void asm sideeffect "", "~{s99}" ()
ret void
}
; GCN-LABEL: {{^}}used_101_sgprs:
; GFX9: ; Occupancy: 7
; GFX1010: ; Occupancy: 20
define amdgpu_kernel void @used_101_sgprs() {
call void asm sideeffect "", "~{s100}" ()
ret void
}
; GCN-LABEL: {{^}}used_lds_6552:
; GFX9: ; Occupancy: 10
; GFX1010: ; Occupancy: 20
@lds6552 = internal addrspace(3) global [6552 x i8] undef, align 4
define amdgpu_kernel void @used_lds_6552() {
%p = bitcast [6552 x i8] addrspace(3)* @lds6552 to i8 addrspace(3)*
store volatile i8 1, i8 addrspace(3)* %p
ret void
}
; GCN-LABEL: {{^}}used_lds_6556:
; GFX9: ; Occupancy: 10
; GFX1010W64: ; Occupancy: 20
; GFX1010W32: ; Occupancy: 20
@lds6556 = internal addrspace(3) global [6556 x i8] undef, align 4
define amdgpu_kernel void @used_lds_6556() {
%p = bitcast [6556 x i8] addrspace(3)* @lds6556 to i8 addrspace(3)*
store volatile i8 1, i8 addrspace(3)* %p
ret void
}
; GCN-LABEL: {{^}}used_lds_13112:
; GFX9: ; Occupancy: 10
; GFX1010W64: ; Occupancy: 20
; GFX1010W32: ; Occupancy: 20
@lds13112 = internal addrspace(3) global [13112 x i8] undef, align 4
define amdgpu_kernel void @used_lds_13112() {
%p = bitcast [13112 x i8] addrspace(3)* @lds13112 to i8 addrspace(3)*
store volatile i8 1, i8 addrspace(3)* %p
ret void
}
attributes #0 = { "amdgpu-waves-per-eu"="2,3" }
attributes #1 = { "amdgpu-waves-per-eu"="18,18" }
attributes #2 = { "amdgpu-waves-per-eu"="19,19" }
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