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llvm-project/llvm/test/CodeGen/AMDGPU/hsa-metadata-kernel-code-props.ll
Scott Linder 60b1967c39 [AMDGPU] Add Scratch Wave Offset to Scratch Buffer Descriptor in entry functions 
Add the scratch wave offset to the scratch buffer descriptor (SRSrc) in
the entry function prologue. This allows us to removes the scratch wave
offset register from the calling convention ABI.

As part of this change, allow the use of an inline constant zero for the
SOffset of MUBUF instructions accessing the stack in entry functions
when a frame pointer is not requested/required. Entry functions with
calls still need to set up the calling convention ABI stack pointer
register, and reference it in order to address arguments of called
functions. The ABI stack pointer register remains unswizzled, but is now
wave-relative instead of queue-relative.

Non-entry functions also use an inline constant zero SOffset for
wave-relative scratch access, but continue to use the stack and frame
pointers as before. When the stack or frame pointer is converted to a
swizzled offset it is now scaled directly, as the scratch wave offset no
longer needs to be subtracted first.

Update llvm/docs/AMDGPUUsage.rst to reflect these changes to the calling
convention.

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D75138
2020-03-19 15:35:16 -04:00

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; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx700 -mattr=-code-object-v3 -enable-misched=0 -filetype=obj -o - < %s | llvm-readelf --notes | FileCheck --check-prefix=CHECK --check-prefix=GFX700 --check-prefix=NOTES %s
; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx803 -mattr=-code-object-v3 -enable-misched=0 -filetype=obj -o - < %s | llvm-readelf --notes | FileCheck --check-prefix=CHECK --check-prefix=GFX803 --check-prefix=NOTES %s
; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx900 -mattr=-code-object-v3 -enable-misched=0 -filetype=obj -o - < %s | llvm-readelf --notes | FileCheck --check-prefix=CHECK --check-prefix=GFX900 --check-prefix=NOTES %s
@var = addrspace(1) global float 0.0
; CHECK: ---
; CHECK: Version: [ 1, 0 ]
; CHECK: Kernels:
; CHECK-LABEL: - Name: test
; CHECK: SymbolName: 'test@kd'
; CHECK: CodeProps:
; CHECK: KernargSegmentSize: 24
; CHECK: GroupSegmentFixedSize: 0
; CHECK: PrivateSegmentFixedSize: 0
; CHECK: KernargSegmentAlign: 8
; CHECK: WavefrontSize: 64
; CHECK: NumSGPRs: 8
; CHECK: NumVGPRs: 6
; CHECK: MaxFlatWorkGroupSize: 1024
define amdgpu_kernel void @test(
half addrspace(1)* %r,
half addrspace(1)* %a,
half addrspace(1)* %b) {
entry:
%a.val = load half, half addrspace(1)* %a
%b.val = load half, half addrspace(1)* %b
%r.val = fadd half %a.val, %b.val
store half %r.val, half addrspace(1)* %r
ret void
}
; CHECK-LABEL: - Name: test_max_flat_workgroup_size
; CHECK: SymbolName: 'test_max_flat_workgroup_size@kd'
; CHECK: CodeProps:
; CHECK: KernargSegmentSize: 24
; CHECK: GroupSegmentFixedSize: 0
; CHECK: PrivateSegmentFixedSize: 0
; CHECK: KernargSegmentAlign: 8
; CHECK: WavefrontSize: 64
; CHECK: NumSGPRs: 8
; CHECK: NumVGPRs: 6
; CHECK: MaxFlatWorkGroupSize: 256
define amdgpu_kernel void @test_max_flat_workgroup_size(
half addrspace(1)* %r,
half addrspace(1)* %a,
half addrspace(1)* %b) #2 {
entry:
%a.val = load half, half addrspace(1)* %a
%b.val = load half, half addrspace(1)* %b
%r.val = fadd half %a.val, %b.val
store half %r.val, half addrspace(1)* %r
ret void
}
; CHECK-LABEL: - Name: num_spilled_sgprs
; CHECK: SymbolName: 'num_spilled_sgprs@kd'
; CHECK: CodeProps:
; GFX700: NumSpilledSGPRs: 38
; GFX803: NumSpilledSGPRs: 22
; GFX900: NumSpilledSGPRs: 22
define amdgpu_kernel void @num_spilled_sgprs(
i32 addrspace(1)* %out0, i32 addrspace(1)* %out1, [8 x i32],
i32 addrspace(1)* %out2, i32 addrspace(1)* %out3, [8 x i32],
i32 addrspace(1)* %out4, i32 addrspace(1)* %out5, [8 x i32],
i32 addrspace(1)* %out6, i32 addrspace(1)* %out7, [8 x i32],
i32 addrspace(1)* %out8, i32 addrspace(1)* %out9, [8 x i32],
i32 addrspace(1)* %outa, i32 addrspace(1)* %outb, [8 x i32],
i32 addrspace(1)* %outc, i32 addrspace(1)* %outd, [8 x i32],
i32 addrspace(1)* %oute, i32 addrspace(1)* %outf, [8 x i32],
i32 %in0, i32 %in1, i32 %in2, i32 %in3, [8 x i32],
i32 %in4, i32 %in5, i32 %in6, i32 %in7, [8 x i32],
i32 %in8, i32 %in9, i32 %ina, i32 %inb, [8 x i32],
i32 %inc, i32 %ind, i32 %ine, i32 %inf) #0 {
entry:
store i32 %in0, i32 addrspace(1)* %out0
store i32 %in1, i32 addrspace(1)* %out1
store i32 %in2, i32 addrspace(1)* %out2
store i32 %in3, i32 addrspace(1)* %out3
store i32 %in4, i32 addrspace(1)* %out4
store i32 %in5, i32 addrspace(1)* %out5
store i32 %in6, i32 addrspace(1)* %out6
store i32 %in7, i32 addrspace(1)* %out7
store i32 %in8, i32 addrspace(1)* %out8
store i32 %in9, i32 addrspace(1)* %out9
store i32 %ina, i32 addrspace(1)* %outa
store i32 %inb, i32 addrspace(1)* %outb
store i32 %inc, i32 addrspace(1)* %outc
store i32 %ind, i32 addrspace(1)* %outd
store i32 %ine, i32 addrspace(1)* %oute
store i32 %inf, i32 addrspace(1)* %outf
ret void
}
; CHECK-LABEL: - Name: num_spilled_vgprs
; CHECK: SymbolName: 'num_spilled_vgprs@kd'
; CHECK: CodeProps:
; CHECK: NumSpilledVGPRs: 14
define amdgpu_kernel void @num_spilled_vgprs() #1 {
%val0 = load volatile float, float addrspace(1)* @var
%val1 = load volatile float, float addrspace(1)* @var
%val2 = load volatile float, float addrspace(1)* @var
%val3 = load volatile float, float addrspace(1)* @var
%val4 = load volatile float, float addrspace(1)* @var
%val5 = load volatile float, float addrspace(1)* @var
%val6 = load volatile float, float addrspace(1)* @var
%val7 = load volatile float, float addrspace(1)* @var
%val8 = load volatile float, float addrspace(1)* @var
%val9 = load volatile float, float addrspace(1)* @var
%val10 = load volatile float, float addrspace(1)* @var
%val11 = load volatile float, float addrspace(1)* @var
%val12 = load volatile float, float addrspace(1)* @var
%val13 = load volatile float, float addrspace(1)* @var
%val14 = load volatile float, float addrspace(1)* @var
%val15 = load volatile float, float addrspace(1)* @var
%val16 = load volatile float, float addrspace(1)* @var
%val17 = load volatile float, float addrspace(1)* @var
%val18 = load volatile float, float addrspace(1)* @var
%val19 = load volatile float, float addrspace(1)* @var
%val20 = load volatile float, float addrspace(1)* @var
%val21 = load volatile float, float addrspace(1)* @var
%val22 = load volatile float, float addrspace(1)* @var
%val23 = load volatile float, float addrspace(1)* @var
%val24 = load volatile float, float addrspace(1)* @var
%val25 = load volatile float, float addrspace(1)* @var
%val26 = load volatile float, float addrspace(1)* @var
%val27 = load volatile float, float addrspace(1)* @var
%val28 = load volatile float, float addrspace(1)* @var
%val29 = load volatile float, float addrspace(1)* @var
%val30 = load volatile float, float addrspace(1)* @var
store volatile float %val0, float addrspace(1)* @var
store volatile float %val1, float addrspace(1)* @var
store volatile float %val2, float addrspace(1)* @var
store volatile float %val3, float addrspace(1)* @var
store volatile float %val4, float addrspace(1)* @var
store volatile float %val5, float addrspace(1)* @var
store volatile float %val6, float addrspace(1)* @var
store volatile float %val7, float addrspace(1)* @var
store volatile float %val8, float addrspace(1)* @var
store volatile float %val9, float addrspace(1)* @var
store volatile float %val10, float addrspace(1)* @var
store volatile float %val11, float addrspace(1)* @var
store volatile float %val12, float addrspace(1)* @var
store volatile float %val13, float addrspace(1)* @var
store volatile float %val14, float addrspace(1)* @var
store volatile float %val15, float addrspace(1)* @var
store volatile float %val16, float addrspace(1)* @var
store volatile float %val17, float addrspace(1)* @var
store volatile float %val18, float addrspace(1)* @var
store volatile float %val19, float addrspace(1)* @var
store volatile float %val20, float addrspace(1)* @var
store volatile float %val21, float addrspace(1)* @var
store volatile float %val22, float addrspace(1)* @var
store volatile float %val23, float addrspace(1)* @var
store volatile float %val24, float addrspace(1)* @var
store volatile float %val25, float addrspace(1)* @var
store volatile float %val26, float addrspace(1)* @var
store volatile float %val27, float addrspace(1)* @var
store volatile float %val28, float addrspace(1)* @var
store volatile float %val29, float addrspace(1)* @var
store volatile float %val30, float addrspace(1)* @var
ret void
}
attributes #0 = { "amdgpu-num-sgpr"="14" }
attributes #1 = { "amdgpu-num-vgpr"="20" }
attributes #2 = { "amdgpu-flat-work-group-size"="1,256" }
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