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llvm-mirror/test/CodeGen/AMDGPU/load-local-f64.ll
Marek Olsak 3f71d5838c AMDGPU: enable 128-bit for local addr space under an option 
Author: Samuel Pitoiset

ds_read_b128 and ds_write_b128 have been recently enabled
under the amdgpu-ds128 option because the performance benefit
is unclear.

Though, using 128-bit loads/stores for the local address space
appears to introduce regressions in tessellation shaders. Not
sure what is broken, but as ds_read_b128/ds_write_b128 are not
enabled by default, just introduce a global option and enable
128-bit only if requested (until it's fixed/used correctly).

v2: - fix regressions in merge-stores.ll and multiple_tails.ll

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=105464
llvm-svn: 329764
2018-04-10 22:48:23 +00:00

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; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefixes=GCN,SICIVI,FUNC %s
; RUN: llc -mtriple=amdgcn--amdhsa -mcpu=kaveri -verify-machineinstrs < %s | FileCheck -check-prefixes=GCN,SICIVI,FUNC %s
; RUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs < %s | FileCheck -check-prefixes=GCN,SICIVI,FUNC %s
; RUN: llc -march=amdgcn -mcpu=gfx900 -verify-machineinstrs < %s | FileCheck -check-prefixes=GCN,GFX9,FUNC %s
; RUN: llc -march=r600 -mcpu=redwood < %s | FileCheck -check-prefixes=EG,FUNC %s
; Testing for ds_read_b128
; RUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs -mattr=+enable-ds128 < %s | FileCheck -check-prefixes=CIVI,FUNC %s
; RUN: llc -march=amdgcn -mcpu=gfx900 -verify-machineinstrs -mattr=+enable-ds128 < %s | FileCheck -check-prefixes=CIVI,FUNC %s
; FUNC-LABEL: {{^}}local_load_f64:
; SICIV: s_mov_b32 m0
; GFX9-NOT: m0
; GCN: ds_read_b64 [[VAL:v\[[0-9]+:[0-9]+\]]], v{{[0-9]+}}{{$}}
; GCN: ds_write_b64 v{{[0-9]+}}, [[VAL]]
; EG: LDS_READ_RET
; EG: LDS_READ_RET
define amdgpu_kernel void @local_load_f64(double addrspace(3)* %out, double addrspace(3)* %in) #0 {
%ld = load double, double addrspace(3)* %in
store double %ld, double addrspace(3)* %out
ret void
}
; FUNC-LABEL: {{^}}local_load_v2f64:
; SICIV: s_mov_b32 m0
; GFX9-NOT: m0
; GCN: ds_read2_b64
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
define amdgpu_kernel void @local_load_v2f64(<2 x double> addrspace(3)* %out, <2 x double> addrspace(3)* %in) #0 {
entry:
%ld = load <2 x double>, <2 x double> addrspace(3)* %in
store <2 x double> %ld, <2 x double> addrspace(3)* %out
ret void
}
; FUNC-LABEL: {{^}}local_load_v3f64:
; SICIV: s_mov_b32 m0
; GFX9-NOT: m0
; GCN-DAG: ds_read2_b64
; GCN-DAG: ds_read_b64
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
define amdgpu_kernel void @local_load_v3f64(<3 x double> addrspace(3)* %out, <3 x double> addrspace(3)* %in) #0 {
entry:
%ld = load <3 x double>, <3 x double> addrspace(3)* %in
store <3 x double> %ld, <3 x double> addrspace(3)* %out
ret void
}
; FUNC-LABEL: {{^}}local_load_v4f64:
; SICIV: s_mov_b32 m0
; GFX9-NOT: m0
; GCN: ds_read2_b64
; GCN: ds_read2_b64
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
define amdgpu_kernel void @local_load_v4f64(<4 x double> addrspace(3)* %out, <4 x double> addrspace(3)* %in) #0 {
entry:
%ld = load <4 x double>, <4 x double> addrspace(3)* %in
store <4 x double> %ld, <4 x double> addrspace(3)* %out
ret void
}
; FUNC-LABEL: {{^}}local_load_v8f64:
; SICIV: s_mov_b32 m0
; GFX9-NOT: m0
; GCN: ds_read2_b64
; GCN: ds_read2_b64
; GCN: ds_read2_b64
; GCN: ds_read2_b64
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
define amdgpu_kernel void @local_load_v8f64(<8 x double> addrspace(3)* %out, <8 x double> addrspace(3)* %in) #0 {
entry:
%ld = load <8 x double>, <8 x double> addrspace(3)* %in
store <8 x double> %ld, <8 x double> addrspace(3)* %out
ret void
}
; FUNC-LABEL: {{^}}local_load_v16f64:
; SICIV: s_mov_b32 m0
; GFX9-NOT: m0
; GCN: ds_read2_b64
; GCN: ds_read2_b64
; GCN: ds_read2_b64
; GCN: ds_read2_b64
; GCN: ds_read2_b64
; GCN: ds_read2_b64
; GCN: ds_read2_b64
; GCN: ds_read2_b64
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
define amdgpu_kernel void @local_load_v16f64(<16 x double> addrspace(3)* %out, <16 x double> addrspace(3)* %in) #0 {
entry:
%ld = load <16 x double>, <16 x double> addrspace(3)* %in
store <16 x double> %ld, <16 x double> addrspace(3)* %out
ret void
}
; Tests if ds_read_b128 gets generated for the 16 byte aligned load.
; FUNC-LABEL: {{^}}local_load_v2f64_to_128:
; CIVI: ds_read_b128
; CIVI: ds_write_b128
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
; EG: LDS_READ_RET
define amdgpu_kernel void @local_load_v2f64_to_128(<2 x double> addrspace(3)* %out, <2 x double> addrspace(3)* %in) {
entry:
%ld = load <2 x double>, <2 x double> addrspace(3)* %in, align 16
store <2 x double> %ld, <2 x double> addrspace(3)* %out, align 16
ret void
}
attributes #0 = { nounwind }
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