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llvm-project/llvm/test/CodeGen/AMDGPU/si-spill-sgpr-stack.ll
Matt Arsenault dc45274d54 AMDGPU: Implement SGPR spilling with scalar stores 
nThis avoids the nasty problems caused by using
memory instructions that read the exec mask while
spilling / restoring registers used for control flow
masking, but only for VI when these were added.

This always uses the scalar stores when enabled currently,
but it may be better to still try to spill to a VGPR
and use this on the fallback memory path.

The cache also needs to be flushed before wave termination
if a scalar store is used.

llvm-svn: 286766
2016-11-13 18:20:54 +00:00

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; RUN: llc -march=amdgcn -mcpu=fiji -amdgpu-spill-sgpr-to-smem=0 -verify-machineinstrs < %s | FileCheck -check-prefix=ALL -check-prefix=SGPR %s
; RUN: llc -march=amdgcn -mcpu=fiji -amdgpu-spill-sgpr-to-smem=1 -verify-machineinstrs < %s | FileCheck -check-prefix=ALL -check-prefix=SMEM %s
; Make sure this doesn't crash.
; ALL-LABEL: {{^}}test:
; ALL: s_mov_b32 s92, SCRATCH_RSRC_DWORD0
; ALL: s_mov_b32 s91, s3
; Make sure we are handling hazards correctly.
; SGPR: buffer_load_dword [[VHI:v[0-9]+]], off, s[{{[0-9]+:[0-9]+}}], s{{[0-9]+}} offset:12
; SGPR-NEXT: s_waitcnt vmcnt(0)
; SGPR-NEXT: v_readfirstlane_b32 s[[HI:[0-9]+]], [[VHI]]
; SGPR-NEXT: s_nop 4
; SGPR-NEXT: buffer_store_dword v0, off, s[0:[[HI]]{{\]}}, 0
; Make sure scratch wave offset register is correctly incremented and
; then restored.
; SMEM: s_mov_b32 m0, s91{{$}}
; SMEM: s_buffer_store_dword s{{[0-9]+}}, s[92:95], m0 ; 16-byte Folded Spill
; SMEM: s_add_u32 m0, s91, 0x100{{$}}
; SMEM: s_buffer_store_dword s{{[0-9]+}}, s[92:95], m0 ; 16-byte Folded Spill
; SMEM: s_add_u32 m0, s91, 0x200{{$}}
; SMEM: s_buffer_store_dword s{{[0-9]+}}, s[92:95], m0 ; 16-byte Folded Spill
; SMEM: s_add_u32 m0, s91, 0x300{{$}}
; SMEM: s_buffer_store_dword s{{[0-9]+}}, s[92:95], m0 ; 16-byte Folded Spill
; SMEM: s_mov_b32 m0, s91{{$}}
; SMEM: s_buffer_load_dword s{{[0-9]+}}, s[92:95], m0 ; 16-byte Folded Reload
; SMEM: s_add_u32 m0, s91, 0x100{{$}}
; SMEM: s_waitcnt lgkmcnt(0)
; SMEM: s_buffer_load_dword s{{[0-9]+}}, s[92:95], m0 ; 16-byte Folded Reload
; SMEM: s_add_u32 m0, s91, 0x200{{$}}
; SMEM: s_waitcnt lgkmcnt(0)
; SMEM: s_buffer_load_dword s{{[0-9]+}}, s[92:95], m0 ; 16-byte Folded Reload
; SMEM: s_add_u32 m0, s91, 0x300{{$}}
; SMEM: s_waitcnt lgkmcnt(0)
; SMEM: s_buffer_load_dword s{{[0-9]+}}, s[92:95], m0 ; 16-byte Folded Reload
; ALL: s_endpgm
define void @test(i32 addrspace(1)* %out, i32 %in) {
call void asm sideeffect "", "~{SGPR0_SGPR1_SGPR2_SGPR3_SGPR4_SGPR5_SGPR6_SGPR7}" ()
call void asm sideeffect "", "~{SGPR8_SGPR9_SGPR10_SGPR11_SGPR12_SGPR13_SGPR14_SGPR15}" ()
call void asm sideeffect "", "~{SGPR16_SGPR17_SGPR18_SGPR19_SGPR20_SGPR21_SGPR22_SGPR23}" ()
call void asm sideeffect "", "~{SGPR24_SGPR25_SGPR26_SGPR27_SGPR28_SGPR29_SGPR30_SGPR31}" ()
call void asm sideeffect "", "~{SGPR32_SGPR33_SGPR34_SGPR35_SGPR36_SGPR37_SGPR38_SGPR39}" ()
call void asm sideeffect "", "~{SGPR40_SGPR41_SGPR42_SGPR43_SGPR44_SGPR45_SGPR46_SGPR47}" ()
call void asm sideeffect "", "~{SGPR48_SGPR49_SGPR50_SGPR51_SGPR52_SGPR53_SGPR54_SGPR55}" ()
call void asm sideeffect "", "~{SGPR56_SGPR57_SGPR58_SGPR59_SGPR60_SGPR61_SGPR62_SGPR63}" ()
call void asm sideeffect "", "~{SGPR64_SGPR65_SGPR66_SGPR67_SGPR68_SGPR69_SGPR70_SGPR71}" ()
call void asm sideeffect "", "~{SGPR72_SGPR73_SGPR74_SGPR75_SGPR76_SGPR77_SGPR78_SGPR79}" ()
call void asm sideeffect "", "~{SGPR80_SGPR81_SGPR82_SGPR83_SGPR84_SGPR85_SGPR86_SGPR87}" ()
call void asm sideeffect "", "~{SGPR88_SGPR89_SGPR90_SGPR91_SGPR92_SGPR93_SGPR94_SGPR95}" ()
call void asm sideeffect "", "~{VGPR0_VGPR1_VGPR2_VGPR3_VGPR4_VGPR5_VGPR6_VGPR7}" ()
call void asm sideeffect "", "~{VGPR8_VGPR9_VGPR10_VGPR11_VGPR12_VGPR13_VGPR14_VGPR15}" ()
call void asm sideeffect "", "~{VGPR16_VGPR17_VGPR18_VGPR19_VGPR20_VGPR21_VGPR22_VGPR23}" ()
call void asm sideeffect "", "~{VGPR24_VGPR25_VGPR26_VGPR27_VGPR28_VGPR29_VGPR30_VGPR31}" ()
call void asm sideeffect "", "~{VGPR32_VGPR33_VGPR34_VGPR35_VGPR36_VGPR37_VGPR38_VGPR39}" ()
call void asm sideeffect "", "~{VGPR40_VGPR41_VGPR42_VGPR43_VGPR44_VGPR45_VGPR46_VGPR47}" ()
call void asm sideeffect "", "~{VGPR48_VGPR49_VGPR50_VGPR51_VGPR52_VGPR53_VGPR54_VGPR55}" ()
call void asm sideeffect "", "~{VGPR56_VGPR57_VGPR58_VGPR59_VGPR60_VGPR61_VGPR62_VGPR63}" ()
call void asm sideeffect "", "~{VGPR64_VGPR65_VGPR66_VGPR67_VGPR68_VGPR69_VGPR70_VGPR71}" ()
call void asm sideeffect "", "~{VGPR72_VGPR73_VGPR74_VGPR75_VGPR76_VGPR77_VGPR78_VGPR79}" ()
call void asm sideeffect "", "~{VGPR80_VGPR81_VGPR82_VGPR83_VGPR84_VGPR85_VGPR86_VGPR87}" ()
call void asm sideeffect "", "~{VGPR88_VGPR89_VGPR90_VGPR91_VGPR92_VGPR93_VGPR94_VGPR95}" ()
call void asm sideeffect "", "~{VGPR96_VGPR97_VGPR98_VGPR99_VGPR100_VGPR101_VGPR102_VGPR103}" ()
call void asm sideeffect "", "~{VGPR104_VGPR105_VGPR106_VGPR107_VGPR108_VGPR109_VGPR110_VGPR111}" ()
call void asm sideeffect "", "~{VGPR112_VGPR113_VGPR114_VGPR115_VGPR116_VGPR117_VGPR118_VGPR119}" ()
call void asm sideeffect "", "~{VGPR120_VGPR121_VGPR122_VGPR123_VGPR124_VGPR125_VGPR126_VGPR127}" ()
call void asm sideeffect "", "~{VGPR128_VGPR129_VGPR130_VGPR131_VGPR132_VGPR133_VGPR134_VGPR135}" ()
call void asm sideeffect "", "~{VGPR136_VGPR137_VGPR138_VGPR139_VGPR140_VGPR141_VGPR142_VGPR143}" ()
call void asm sideeffect "", "~{VGPR144_VGPR145_VGPR146_VGPR147_VGPR148_VGPR149_VGPR150_VGPR151}" ()
call void asm sideeffect "", "~{VGPR152_VGPR153_VGPR154_VGPR155_VGPR156_VGPR157_VGPR158_VGPR159}" ()
call void asm sideeffect "", "~{VGPR160_VGPR161_VGPR162_VGPR163_VGPR164_VGPR165_VGPR166_VGPR167}" ()
call void asm sideeffect "", "~{VGPR168_VGPR169_VGPR170_VGPR171_VGPR172_VGPR173_VGPR174_VGPR175}" ()
call void asm sideeffect "", "~{VGPR176_VGPR177_VGPR178_VGPR179_VGPR180_VGPR181_VGPR182_VGPR183}" ()
call void asm sideeffect "", "~{VGPR184_VGPR185_VGPR186_VGPR187_VGPR188_VGPR189_VGPR190_VGPR191}" ()
call void asm sideeffect "", "~{VGPR192_VGPR193_VGPR194_VGPR195_VGPR196_VGPR197_VGPR198_VGPR199}" ()
call void asm sideeffect "", "~{VGPR200_VGPR201_VGPR202_VGPR203_VGPR204_VGPR205_VGPR206_VGPR207}" ()
call void asm sideeffect "", "~{VGPR208_VGPR209_VGPR210_VGPR211_VGPR212_VGPR213_VGPR214_VGPR215}" ()
call void asm sideeffect "", "~{VGPR216_VGPR217_VGPR218_VGPR219_VGPR220_VGPR221_VGPR222_VGPR223}" ()
call void asm sideeffect "", "~{VGPR224_VGPR225_VGPR226_VGPR227_VGPR228_VGPR229_VGPR230_VGPR231}" ()
call void asm sideeffect "", "~{VGPR232_VGPR233_VGPR234_VGPR235_VGPR236_VGPR237_VGPR238_VGPR239}" ()
call void asm sideeffect "", "~{VGPR240_VGPR241_VGPR242_VGPR243_VGPR244_VGPR245_VGPR246_VGPR247}" ()
call void asm sideeffect "", "~{VGPR248_VGPR249_VGPR250_VGPR251_VGPR252_VGPR253_VGPR254_VGPR255}" ()
store i32 %in, i32 addrspace(1)* %out
ret void
}
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