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llvm-mirror/test/CodeGen/AMDGPU/llvm.SI.fs.interp.ll
Tom Stellard 5569b3eb62 AMDGPU/SI: Don't mark VINTRP instructions as mayLoad
Summary:
These instructions technically do read from memory, but the memory
is considered to be out of bounds for normal load/store instructions.

shader-db stats:

SGPRS: 1416075 -> 1413323 (-0.19 %)
VGPRS: 867413 -> 863935 (-0.40 %)
Spilled SGPRs: 1409 -> 1354 (-3.90 %)
Spilled VGPRs: 63 -> 63 (0.00 %)
Private memory VGPRs: 880 -> 880 (0.00 %)
Scratch size: 2648 -> 2632 (-0.60 %) dwords per thread
Code Size: 37889052 -> 37897340 (0.02 %) bytes
LDS: 2147 -> 2147 (0.00 %) blocks
Max Waves: 279243 -> 280369 (0.40 %)
Wait states: 0 -> 0 (0.00 %)

Reviewers: nhaehnle, mareko, arsenm

Subscribers: kzhuravl, wdng, yaxunl, tony-tye

Differential Revision: https://reviews.llvm.org/D27593

llvm-svn: 289219
2016-12-09 15:57:15 +00:00

60 lines
2.7 KiB
LLVM

;RUN: llc < %s -march=amdgcn -mcpu=verde -verify-machineinstrs | FileCheck --check-prefix=GCN %s
;RUN: llc < %s -march=amdgcn -mcpu=kabini -verify-machineinstrs | FileCheck --check-prefix=GCN --check-prefix=16BANK %s
;RUN: llc < %s -march=amdgcn -mcpu=stoney -verify-machineinstrs | FileCheck --check-prefix=GCN --check-prefix=16BANK %s
;RUN: llc < %s -march=amdgcn -mcpu=tonga -verify-machineinstrs | FileCheck --check-prefix=GCN %s
;GCN-LABEL: {{^}}main:
;GCN-NOT: s_wqm
;GCN: s_mov_b32 m0
;GCN-DAG: v_interp_mov_f32
;GCN-DAG: v_interp_p1_f32
;GCN-DAG: v_interp_p2_f32
define amdgpu_ps void @main(<16 x i8> addrspace(2)* inreg, <16 x i8> addrspace(2)* inreg, <32 x i8> addrspace(2)* inreg, i32 inreg, <2 x i32>) {
main_body:
%5 = call float @llvm.SI.fs.constant(i32 0, i32 0, i32 %3)
%6 = call float @llvm.SI.fs.interp(i32 0, i32 0, i32 %3, <2 x i32> %4)
%7 = call float @llvm.SI.fs.interp(i32 1, i32 0, i32 %3, <2 x i32> %4)
call void @llvm.SI.export(i32 15, i32 1, i32 1, i32 0, i32 1, float %5, float %6, float %7, float %7)
ret void
}
; Thest that v_interp_p1 uses different source and destination registers
; on 16 bank LDS chips.
; 16BANK-LABEL: {{^}}v_interp_p1_bank16_bug:
; 16BANK-NOT: v_interp_p1_f32 [[DST:v[0-9]+]], [[DST]]
define amdgpu_ps void @v_interp_p1_bank16_bug([6 x <16 x i8>] addrspace(2)* byval, [17 x <16 x i8>] addrspace(2)* byval, [17 x <4 x i32>] addrspace(2)* byval, [34 x <8 x i32>] addrspace(2)* byval, float inreg, i32 inreg, <2 x i32>, <2 x i32>, <2 x i32>, <3 x i32>, <2 x i32>, <2 x i32>, <2 x i32>, float, float, float, float, float, float, i32, float, float) {
main_body:
%22 = call float @llvm.SI.fs.interp(i32 0, i32 0, i32 %5, <2 x i32> %7)
%23 = call float @llvm.SI.fs.interp(i32 1, i32 0, i32 %5, <2 x i32> %7)
%24 = call float @llvm.SI.fs.interp(i32 2, i32 0, i32 %5, <2 x i32> %7)
%25 = call float @fabs(float %22)
%26 = call float @fabs(float %23)
%27 = call float @fabs(float %24)
%28 = call i32 @llvm.SI.packf16(float %25, float %26)
%29 = bitcast i32 %28 to float
%30 = call i32 @llvm.SI.packf16(float %27, float 1.000000e+00)
%31 = bitcast i32 %30 to float
call void @llvm.SI.export(i32 15, i32 1, i32 1, i32 0, i32 1, float %29, float %31, float %29, float %31)
ret void
}
; Function Attrs: readnone
declare float @fabs(float) #1
; Function Attrs: nounwind readnone
declare i32 @llvm.SI.packf16(float, float) #0
; Function Attrs: nounwind readnone
declare float @llvm.SI.fs.constant(i32, i32, i32) #0
; Function Attrs: nounwind readnone
declare float @llvm.SI.fs.interp(i32, i32, i32, <2 x i32>) #0
declare void @llvm.SI.export(i32, i32, i32, i32, i32, float, float, float, float)
attributes #0 = { nounwind readnone }
attributes #1 = { readnone }