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clang-p2996/llvm/test/CodeGen/AMDGPU/waitcnt-overflow.mir
Matt Arsenault 4b4496312e AMDGPU: Start adding MODE register uses to instructions 
This is the groundwork required to implement strictfp. For now, this
should be NFC for regular instructoins (many instructions just gain an
extra use of a reserved register). Regalloc won't rematerialize
instructions with reads of physical registers, but we were suffering
from that anyway with the exec reads.

Should add it for all the related FP uses (possibly with some
extras). I did not add it to either the gpr index mode instructions
(or every single VALU instruction) since it's a ridiculous feature
already modeled as an arbitrary side effect.

Also work towards marking instructions with FP exceptions. This
doesn't actually set the bit yet since this would start to change
codegen. It seems nofpexcept is currently not implied from the regular
IR FP operations. Add it to some MIR tests where I think it might
matter.
2020-05-27 14:47:00 -04:00

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# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -march=amdgcn -mcpu=gfx900 -verify-machineinstrs -run-pass si-insert-waitcnts -o - %s | FileCheck -check-prefixes=GFX9,GFX9_10 %s
# RUN: llc -march=amdgcn -mcpu=gfx1010 -verify-machineinstrs -run-pass si-insert-waitcnts -o - %s | FileCheck -check-prefixes=GFX10,GFX9_10 %s
# Check that we handle cases where a counter has overflowed.
# Overflows lgkmcnt with gfx9 but not with gfx10.
---
name: max-counter-lgkmcnt
body: |
bb.0:
liveins: $vgpr99
; GFX9-LABEL: name: max-counter-lgkmcnt
; GFX9: S_WAITCNT 0
; GFX9: $vgpr34_vgpr35 = DS_READ2_B32_gfx9 renamable $vgpr99, 34, 35, 0, implicit $exec
; GFX9-NOT: S_WAITCNT 53119
; GFX9-NEXT: S_WAITCNT 52863
; GFX9-NEXT: $vgpr0 = V_MAC_F32_e32 0, $vgpr1, $vgpr0, implicit $mode, implicit $exec
; GFX9-NEXT: $vgpr2 = V_MAC_F32_e32 0, $vgpr3, $vgpr2, implicit $mode, implicit $exec
; GFX9-NEXT: $vgpr4 = V_MAC_F32_e32 0, $vgpr5, $vgpr4, implicit $mode, implicit $exec
; GFX9-NEXT: $vgpr6 = V_MAC_F32_e32 0, $vgpr7, $vgpr6, implicit $mode, implicit $exec
; GFX9-NEXT: S_ENDPGM 0
; GFX10-LABEL: name: max-counter-lgkmcnt
; GFX10: $vgpr34_vgpr35 = DS_READ2_B32_gfx9 renamable $vgpr99, 34, 35, 0, implicit $exec
; GFX10-NEXT: S_WAITCNT 53631
; GFX10-NEXT: $vgpr0 = V_MAC_F32_e32 0, $vgpr1, $vgpr0, implicit $mode, implicit $exec
; GFX10-NEXT: S_WAITCNT 53375
; GFX10-NEXT: $vgpr2 = V_MAC_F32_e32 0, $vgpr3, $vgpr2, implicit $mode, implicit $exec
; GFX10-NEXT: S_WAITCNT 53119
; GFX10-NEXT: $vgpr4 = V_MAC_F32_e32 0, $vgpr5, $vgpr4, implicit $mode, implicit $exec
; GFX10-NEXT: S_WAITCNT 52863
; GFX10-NEXT: $vgpr6 = V_MAC_F32_e32 0, $vgpr7, $vgpr6, implicit $mode, implicit $exec
; GFX10-NEXT: S_ENDPGM 0
$vgpr0_vgpr1 = DS_READ2_B32_gfx9 renamable $vgpr99, 0, 1, 0, implicit $exec
$vgpr2_vgpr3 = DS_READ2_B32_gfx9 renamable $vgpr99, 2, 3, 0, implicit $exec
$vgpr4_vgpr5 = DS_READ2_B32_gfx9 renamable $vgpr99, 4, 5, 0, implicit $exec
$vgpr6_vgpr7 = DS_READ2_B32_gfx9 renamable $vgpr99, 6, 7, 0, implicit $exec
$vgpr8_vgpr9 = DS_READ2_B32_gfx9 renamable $vgpr99, 8, 9, 0, implicit $exec
$vgpr10_vgpr11 = DS_READ2_B32_gfx9 renamable $vgpr99, 10, 11, 0, implicit $exec
$vgpr12_vgpr13 = DS_READ2_B32_gfx9 renamable $vgpr99, 12, 13, 0, implicit $exec
$vgpr14_vgpr15 = DS_READ2_B32_gfx9 renamable $vgpr99, 14, 15, 0, implicit $exec
$vgpr16_vgpr17 = DS_READ2_B32_gfx9 renamable $vgpr99, 16, 17, 0, implicit $exec
$vgpr18_vgpr19 = DS_READ2_B32_gfx9 renamable $vgpr99, 18, 19, 0, implicit $exec
$vgpr20_vgpr21 = DS_READ2_B32_gfx9 renamable $vgpr99, 20, 21, 0, implicit $exec
$vgpr22_vgpr23 = DS_READ2_B32_gfx9 renamable $vgpr99, 22, 23, 0, implicit $exec
$vgpr24_vgpr25 = DS_READ2_B32_gfx9 renamable $vgpr99, 24, 25, 0, implicit $exec
$vgpr26_vgpr27 = DS_READ2_B32_gfx9 renamable $vgpr99, 26, 27, 0, implicit $exec
$vgpr28_vgpr29 = DS_READ2_B32_gfx9 renamable $vgpr99, 28, 29, 0, implicit $exec
$vgpr30_vgpr31 = DS_READ2_B32_gfx9 renamable $vgpr99, 30, 31, 0, implicit $exec
$vgpr32_vgpr33 = DS_READ2_B32_gfx9 renamable $vgpr99, 32, 33, 0, implicit $exec
$vgpr34_vgpr35 = DS_READ2_B32_gfx9 renamable $vgpr99, 34, 35, 0, implicit $exec
$vgpr0 = V_MAC_F32_e32 0, $vgpr1, $vgpr0, implicit $mode, implicit $exec
$vgpr2 = V_MAC_F32_e32 0, $vgpr3, $vgpr2, implicit $mode, implicit $exec
$vgpr4 = V_MAC_F32_e32 0, $vgpr5, $vgpr4, implicit $mode, implicit $exec
$vgpr6 = V_MAC_F32_e32 0, $vgpr7, $vgpr6, implicit $mode, implicit $exec
S_ENDPGM 0
...
# Overflows vmcnt with gfx9 and gfx10.
---
name: max-counter-vmcnt
body: |
bb.0:
liveins: $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4
; GFX9_10-LABEL: name: max-counter-vmcnt
; GFX9_10: $vgpr66 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 264, 0, 0, 0, 0, 0, implicit $exec
; GFX9-NOT: S_WAITCNT 53119
; GFX10-NOT: S_WAITCNT 65407
; GFX9-NEXT: S_WAITCNT 53118
; GFX10-NEXT: S_WAITCNT 65406
; GFX9_10-NEXT: $vgpr0 = V_MAC_F32_e32 0, $vgpr1, $vgpr0, implicit $mode, implicit $exec
; GFX9_10-NEXT: $vgpr1 = V_MAC_F32_e32 0, $vgpr2, $vgpr1, implicit $mode, implicit $exec
; GFX9_10-NEXT: $vgpr2 = V_MAC_F32_e32 0, $vgpr3, $vgpr2, implicit $mode, implicit $exec
; GFX9_10-NEXT: $vgpr3 = V_MAC_F32_e32 0, $vgpr4, $vgpr3, implicit $mode, implicit $exec
; GFX9_10-NEXT: S_ENDPGM 0
$vgpr0 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 0, 0, 0, 0, 0, 0, implicit $exec
$vgpr1 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 4, 0, 0, 0, 0, 0, implicit $exec
$vgpr2 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 8, 0, 0, 0, 0, 0, implicit $exec
$vgpr3 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 12, 0, 0, 0, 0, 0, implicit $exec
$vgpr4 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 16, 0, 0, 0, 0, 0, implicit $exec
$vgpr5 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 20, 0, 0, 0, 0, 0, implicit $exec
$vgpr6 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 24, 0, 0, 0, 0, 0, implicit $exec
$vgpr7 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 28, 0, 0, 0, 0, 0, implicit $exec
$vgpr8 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 32, 0, 0, 0, 0, 0, implicit $exec
$vgpr9 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 36, 0, 0, 0, 0, 0, implicit $exec
$vgpr10 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 40, 0, 0, 0, 0, 0, implicit $exec
$vgpr11 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 44, 0, 0, 0, 0, 0, implicit $exec
$vgpr12 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 48, 0, 0, 0, 0, 0, implicit $exec
$vgpr13 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 52, 0, 0, 0, 0, 0, implicit $exec
$vgpr14 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 56, 0, 0, 0, 0, 0, implicit $exec
$vgpr15 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 60, 0, 0, 0, 0, 0, implicit $exec
$vgpr16 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 64, 0, 0, 0, 0, 0, implicit $exec
$vgpr17 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 68, 0, 0, 0, 0, 0, implicit $exec
$vgpr18 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 72, 0, 0, 0, 0, 0, implicit $exec
$vgpr19 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 76, 0, 0, 0, 0, 0, implicit $exec
$vgpr20 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 80, 0, 0, 0, 0, 0, implicit $exec
$vgpr21 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 84, 0, 0, 0, 0, 0, implicit $exec
$vgpr22 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 88, 0, 0, 0, 0, 0, implicit $exec
$vgpr23 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 92, 0, 0, 0, 0, 0, implicit $exec
$vgpr24 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 96, 0, 0, 0, 0, 0, implicit $exec
$vgpr25 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 100, 0, 0, 0, 0, 0, implicit $exec
$vgpr26 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 104, 0, 0, 0, 0, 0, implicit $exec
$vgpr27 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 108, 0, 0, 0, 0, 0, implicit $exec
$vgpr28 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 112, 0, 0, 0, 0, 0, implicit $exec
$vgpr29 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 116, 0, 0, 0, 0, 0, implicit $exec
$vgpr30 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 120, 0, 0, 0, 0, 0, implicit $exec
$vgpr31 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 124, 0, 0, 0, 0, 0, implicit $exec
$vgpr32 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 128, 0, 0, 0, 0, 0, implicit $exec
$vgpr33 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 132, 0, 0, 0, 0, 0, implicit $exec
$vgpr34 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 136, 0, 0, 0, 0, 0, implicit $exec
$vgpr35 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 140, 0, 0, 0, 0, 0, implicit $exec
$vgpr36 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 144, 0, 0, 0, 0, 0, implicit $exec
$vgpr37 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 148, 0, 0, 0, 0, 0, implicit $exec
$vgpr38 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 152, 0, 0, 0, 0, 0, implicit $exec
$vgpr39 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 156, 0, 0, 0, 0, 0, implicit $exec
$vgpr40 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 160, 0, 0, 0, 0, 0, implicit $exec
$vgpr41 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 164, 0, 0, 0, 0, 0, implicit $exec
$vgpr42 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 168, 0, 0, 0, 0, 0, implicit $exec
$vgpr43 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 172, 0, 0, 0, 0, 0, implicit $exec
$vgpr44 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 176, 0, 0, 0, 0, 0, implicit $exec
$vgpr45 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 180, 0, 0, 0, 0, 0, implicit $exec
$vgpr46 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 184, 0, 0, 0, 0, 0, implicit $exec
$vgpr47 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 188, 0, 0, 0, 0, 0, implicit $exec
$vgpr48 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 192, 0, 0, 0, 0, 0, implicit $exec
$vgpr49 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 196, 0, 0, 0, 0, 0, implicit $exec
$vgpr50 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 200, 0, 0, 0, 0, 0, implicit $exec
$vgpr51 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 204, 0, 0, 0, 0, 0, implicit $exec
$vgpr52 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 208, 0, 0, 0, 0, 0, implicit $exec
$vgpr53 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 212, 0, 0, 0, 0, 0, implicit $exec
$vgpr54 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 216, 0, 0, 0, 0, 0, implicit $exec
$vgpr55 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 220, 0, 0, 0, 0, 0, implicit $exec
$vgpr56 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 224, 0, 0, 0, 0, 0, implicit $exec
$vgpr57 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 228, 0, 0, 0, 0, 0, implicit $exec
$vgpr58 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 232, 0, 0, 0, 0, 0, implicit $exec
$vgpr59 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 236, 0, 0, 0, 0, 0, implicit $exec
$vgpr60 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 240, 0, 0, 0, 0, 0, implicit $exec
$vgpr61 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 244, 0, 0, 0, 0, 0, implicit $exec
$vgpr62 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 248, 0, 0, 0, 0, 0, implicit $exec
$vgpr63 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 252, 0, 0, 0, 0, 0, implicit $exec
$vgpr64 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 256, 0, 0, 0, 0, 0, implicit $exec
$vgpr65 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 260, 0, 0, 0, 0, 0, implicit $exec
$vgpr66 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, 264, 0, 0, 0, 0, 0, implicit $exec
$vgpr0 = V_MAC_F32_e32 0, $vgpr1, $vgpr0, implicit $mode, implicit $exec
$vgpr1 = V_MAC_F32_e32 0, $vgpr2, $vgpr1, implicit $mode, implicit $exec
$vgpr2 = V_MAC_F32_e32 0, $vgpr3, $vgpr2, implicit $mode, implicit $exec
$vgpr3 = V_MAC_F32_e32 0, $vgpr4, $vgpr3, implicit $mode, implicit $exec
S_ENDPGM 0
...
# Should be no waitcnt if expcnt overflows.
---
name: max-counter-expcnt
body: |
bb.0:
liveins: $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr4, $vgpr0, $vgpr1
; GFX9_10-LABEL: name: max-counter-expcnt
; GFX9_10: EXP
; GFX9_10-NOT: S_WAITCNT
EXP 0, $vgpr0, $vgpr0, $vgpr0, $vgpr0, -1, -1, 15, implicit $exec
EXP 0, $vgpr1, $vgpr1, $vgpr1, $vgpr1, -1, -1, 15, implicit $exec
EXP 0, $vgpr1, $vgpr1, $vgpr1, $vgpr1, -1, -1, 15, implicit $exec
EXP 0, $vgpr1, $vgpr1, $vgpr1, $vgpr1, -1, -1, 15, implicit $exec
EXP 0, $vgpr1, $vgpr1, $vgpr1, $vgpr1, -1, -1, 15, implicit $exec
EXP 0, $vgpr1, $vgpr1, $vgpr1, $vgpr1, -1, -1, 15, implicit $exec
EXP 0, $vgpr1, $vgpr1, $vgpr1, $vgpr1, -1, -1, 15, implicit $exec
EXP 0, $vgpr1, $vgpr1, $vgpr1, $vgpr1, -1, -1, 15, implicit $exec
$vgpr0 = V_MAC_F32_e32 0, $vgpr1, $vgpr0, implicit $mode, implicit $exec
S_ENDPGM 0
...
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