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llvm-project/llvm/test/CodeGen/AMDGPU/fastregalloc-self-loop-heur...

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RegAllocFast: Make self loop live-out heuristic more aggressive This currently has no impact on code, but prevents sizeable code size regressions after D52010. This prevents spilling and reloading all values inside blocks that loop back. Add a baseline test which would regress without this patch.
2020-09-01 03:09:50 +08:00
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -verify-machineinstrs -mtriple=amdgcn-amd-amdhsa -mcpu=gfx900 -run-pass=regallocfast -o - %s | FileCheck -check-prefix=GCN %s
---
name: self_loop_single_def_use
tracksRegLiveness: true
machineFunctionInfo:
isEntryFunction: true
scratchRSrcReg: '$sgpr0_sgpr1_sgpr2_sgpr3'
stackPtrOffsetReg: '$sgpr32'
body: |
; GCN-LABEL: name: self_loop_single_def_use
; GCN: bb.0:
; GCN: successors: %bb.1(0x80000000)
; GCN: liveins: $vgpr0_vgpr1
; GCN: SI_SPILL_V64_SAVE killed $vgpr0_vgpr1, %stack.0, $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr32, 0, implicit $exec :: (store 8 into %stack.0, align 4, addrspace 5)
; GCN: bb.1:
; GCN: successors: %bb.1(0x40000000), %bb.2(0x40000000)
; GCN: $vgpr0_vgpr1 = SI_SPILL_V64_RESTORE %stack.0, $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr32, 0, implicit $exec :: (load 8 from %stack.0, align 4, addrspace 5)
; GCN: renamable $vgpr2 = GLOBAL_LOAD_DWORD renamable $vgpr0_vgpr1, 0, 0, 0, 0, implicit $exec
Revert "Reapply Revert "RegAllocFast: Rewrite and improve"" This reverts commit 55f9f87da2c2ad791b9e62cccb1c035e037444fa. Breaks following buildbots: http://lab.llvm.org:8011/builders/lldb-arm-ubuntu/builds/4306 http://lab.llvm.org:8011/builders/lldb-aarch64-ubuntu/builds/9154
2020-09-22 17:20:10 +08:00
; GCN: GLOBAL_STORE_DWORD killed renamable $vgpr0_vgpr1, killed renamable $vgpr2, 0, 0, 0, 0, implicit $exec
RegAllocFast: Make self loop live-out heuristic more aggressive This currently has no impact on code, but prevents sizeable code size regressions after D52010. This prevents spilling and reloading all values inside blocks that loop back. Add a baseline test which would regress without this patch.
2020-09-01 03:09:50 +08:00
; GCN: S_CBRANCH_EXECZ %bb.1, implicit $exec
; GCN: bb.2:
; GCN: S_ENDPGM 0
bb.0:
liveins: $vgpr0_vgpr1
%0:vreg_64 = COPY $vgpr0_vgpr1
bb.1:
%1:vgpr_32 = GLOBAL_LOAD_DWORD %0, 0, 0, 0, 0, implicit $exec
GLOBAL_STORE_DWORD %0, %1, 0, 0, 0, 0, implicit $exec
S_CBRANCH_EXECZ %bb.1, implicit $exec
bb.2:
S_ENDPGM 0
...
---
name: self_loop_multi_def
tracksRegLiveness: true
machineFunctionInfo:
isEntryFunction: true
scratchRSrcReg: '$sgpr0_sgpr1_sgpr2_sgpr3'
stackPtrOffsetReg: '$sgpr32'
body: |
; GCN-LABEL: name: self_loop_multi_def
; GCN: bb.0:
; GCN: successors: %bb.1(0x80000000)
; GCN: liveins: $vgpr0_vgpr1
; GCN: SI_SPILL_V64_SAVE killed $vgpr0_vgpr1, %stack.0, $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr32, 0, implicit $exec :: (store 8 into %stack.0, align 4, addrspace 5)
; GCN: bb.1:
; GCN: successors: %bb.1(0x40000000), %bb.2(0x40000000)
; GCN: $vgpr0_vgpr1 = SI_SPILL_V64_RESTORE %stack.0, $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr32, 0, implicit $exec :: (load 8 from %stack.0, align 4, addrspace 5)
; GCN: renamable $vgpr2 = GLOBAL_LOAD_DWORD renamable $vgpr0_vgpr1, 0, 0, 0, 0, implicit $exec
Revert "Reapply Revert "RegAllocFast: Rewrite and improve"" This reverts commit 55f9f87da2c2ad791b9e62cccb1c035e037444fa. Breaks following buildbots: http://lab.llvm.org:8011/builders/lldb-arm-ubuntu/builds/4306 http://lab.llvm.org:8011/builders/lldb-aarch64-ubuntu/builds/9154
2020-09-22 17:20:10 +08:00
; GCN: GLOBAL_STORE_DWORD renamable $vgpr0_vgpr1, killed renamable $vgpr2, 0, 0, 0, 0, implicit $exec
RegAllocFast: Make self loop live-out heuristic more aggressive This currently has no impact on code, but prevents sizeable code size regressions after D52010. This prevents spilling and reloading all values inside blocks that loop back. Add a baseline test which would regress without this patch.
2020-09-01 03:09:50 +08:00
; GCN: renamable $vgpr2 = GLOBAL_LOAD_DWORD renamable $vgpr0_vgpr1, 0, 0, 0, 0, implicit $exec
Revert "Reapply Revert "RegAllocFast: Rewrite and improve"" This reverts commit 55f9f87da2c2ad791b9e62cccb1c035e037444fa. Breaks following buildbots: http://lab.llvm.org:8011/builders/lldb-arm-ubuntu/builds/4306 http://lab.llvm.org:8011/builders/lldb-aarch64-ubuntu/builds/9154
2020-09-22 17:20:10 +08:00
; GCN: GLOBAL_STORE_DWORD killed renamable $vgpr0_vgpr1, killed renamable $vgpr2, 0, 0, 0, 0, implicit $exec
RegAllocFast: Make self loop live-out heuristic more aggressive This currently has no impact on code, but prevents sizeable code size regressions after D52010. This prevents spilling and reloading all values inside blocks that loop back. Add a baseline test which would regress without this patch.
2020-09-01 03:09:50 +08:00
; GCN: S_CBRANCH_EXECZ %bb.1, implicit $exec
; GCN: bb.2:
; GCN: S_ENDPGM 0
bb.0:
liveins: $vgpr0_vgpr1
%0:vreg_64 = COPY $vgpr0_vgpr1
bb.1:
%1:vgpr_32 = GLOBAL_LOAD_DWORD %0, 0, 0, 0, 0, implicit $exec
GLOBAL_STORE_DWORD %0, %1, 0, 0, 0, 0, implicit $exec
%1:vgpr_32 = GLOBAL_LOAD_DWORD %0, 0, 0, 0, 0, implicit $exec
GLOBAL_STORE_DWORD %0, %1, 0, 0, 0, 0, implicit $exec
S_CBRANCH_EXECZ %bb.1, implicit $exec
bb.2:
S_ENDPGM 0
...
# There's a single def inside the self loop, but it's also a use.
---
name: self_loop_def_use_same_inst
tracksRegLiveness: true
machineFunctionInfo:
isEntryFunction: true
scratchRSrcReg: '$sgpr0_sgpr1_sgpr2_sgpr3'
stackPtrOffsetReg: '$sgpr32'
body: |
; GCN-LABEL: name: self_loop_def_use_same_inst
; GCN: bb.0:
; GCN: successors: %bb.1(0x80000000)
; GCN: liveins: $vgpr0_vgpr1
; GCN: SI_SPILL_V64_SAVE killed $vgpr0_vgpr1, %stack.0, $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr32, 0, implicit $exec :: (store 8 into %stack.0, align 4, addrspace 5)
; GCN: bb.1:
; GCN: successors: %bb.1(0x40000000), %bb.2(0x40000000)
Revert "Reapply Revert "RegAllocFast: Rewrite and improve"" This reverts commit 55f9f87da2c2ad791b9e62cccb1c035e037444fa. Breaks following buildbots: http://lab.llvm.org:8011/builders/lldb-arm-ubuntu/builds/4306 http://lab.llvm.org:8011/builders/lldb-aarch64-ubuntu/builds/9154
2020-09-22 17:20:10 +08:00
; GCN: renamable $vgpr0 = V_ADD_U32_e32 1, undef $vgpr0, implicit $exec
; GCN: $vgpr1_vgpr2 = SI_SPILL_V64_RESTORE %stack.0, $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr32, 0, implicit $exec :: (load 8 from %stack.0, align 4, addrspace 5)
; GCN: GLOBAL_STORE_DWORD killed renamable $vgpr1_vgpr2, killed renamable $vgpr0, 0, 0, 0, 0, implicit $exec
RegAllocFast: Make self loop live-out heuristic more aggressive This currently has no impact on code, but prevents sizeable code size regressions after D52010. This prevents spilling and reloading all values inside blocks that loop back. Add a baseline test which would regress without this patch.
2020-09-01 03:09:50 +08:00
; GCN: S_CBRANCH_EXECZ %bb.1, implicit $exec
; GCN: bb.2:
; GCN: S_ENDPGM 0
bb.0:
liveins: $vgpr0_vgpr1
%0:vreg_64 = COPY $vgpr0_vgpr1
bb.1:
%1:vgpr_32 = V_ADD_U32_e32 1, undef %1, implicit $exec
GLOBAL_STORE_DWORD %0, %1, 0, 0, 0, 0, implicit $exec
S_CBRANCH_EXECZ %bb.1, implicit $exec
bb.2:
S_ENDPGM 0
...
---
name: self_loop_def_after_use
tracksRegLiveness: true
machineFunctionInfo:
isEntryFunction: true
scratchRSrcReg: '$sgpr0_sgpr1_sgpr2_sgpr3'
stackPtrOffsetReg: '$sgpr32'
body: |
; GCN-LABEL: name: self_loop_def_after_use
; GCN: bb.0:
; GCN: successors: %bb.1(0x80000000)
; GCN: liveins: $vgpr0_vgpr1
; GCN: SI_SPILL_V64_SAVE killed $vgpr0_vgpr1, %stack.0, $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr32, 0, implicit $exec :: (store 8 into %stack.0, align 4, addrspace 5)
; GCN: bb.1:
; GCN: successors: %bb.1(0x40000000), %bb.2(0x40000000)
; GCN: $vgpr0_vgpr1 = SI_SPILL_V64_RESTORE %stack.0, $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr32, 0, implicit $exec :: (load 8 from %stack.0, align 4, addrspace 5)
Revert "Reapply Revert "RegAllocFast: Rewrite and improve"" This reverts commit 55f9f87da2c2ad791b9e62cccb1c035e037444fa. Breaks following buildbots: http://lab.llvm.org:8011/builders/lldb-arm-ubuntu/builds/4306 http://lab.llvm.org:8011/builders/lldb-aarch64-ubuntu/builds/9154
2020-09-22 17:20:10 +08:00
; GCN: GLOBAL_STORE_DWORD killed renamable $vgpr0_vgpr1, undef renamable $vgpr0, 0, 0, 0, 0, implicit $exec
; GCN: renamable $vgpr2 = V_ADD_U32_e64 1, 1, 0, implicit $exec
; GCN: SI_SPILL_V32_SAVE killed $vgpr2, %stack.1, $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr32, 0, implicit $exec :: (store 4 into %stack.1, addrspace 5)
RegAllocFast: Make self loop live-out heuristic more aggressive This currently has no impact on code, but prevents sizeable code size regressions after D52010. This prevents spilling and reloading all values inside blocks that loop back. Add a baseline test which would regress without this patch.
2020-09-01 03:09:50 +08:00
; GCN: S_CBRANCH_EXECZ %bb.1, implicit $exec
; GCN: bb.2:
; GCN: S_ENDPGM 0
bb.0:
liveins: $vgpr0_vgpr1
%0:vreg_64 = COPY $vgpr0_vgpr1
bb.1:
GLOBAL_STORE_DWORD %0, undef %1, 0, 0, 0, 0, implicit $exec
%1:vgpr_32 = V_ADD_U32_e64 1, 1, 0, implicit $exec
S_CBRANCH_EXECZ %bb.1, implicit $exec
bb.2:
S_ENDPGM 0
...
---
name: self_loop_single_subreg_def_use
tracksRegLiveness: true
machineFunctionInfo:
isEntryFunction: true
scratchRSrcReg: '$sgpr0_sgpr1_sgpr2_sgpr3'
stackPtrOffsetReg: '$sgpr32'
body: |
; GCN-LABEL: name: self_loop_single_subreg_def_use
; GCN: bb.0:
; GCN: successors: %bb.1(0x80000000)
; GCN: liveins: $vgpr0_vgpr1
; GCN: SI_SPILL_V64_SAVE killed $vgpr0_vgpr1, %stack.0, $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr32, 0, implicit $exec :: (store 8 into %stack.0, align 4, addrspace 5)
; GCN: bb.1:
; GCN: successors: %bb.1(0x40000000), %bb.2(0x40000000)
; GCN: $vgpr0_vgpr1 = SI_SPILL_V64_RESTORE %stack.0, $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr32, 0, implicit $exec :: (load 8 from %stack.0, align 4, addrspace 5)
Revert "Reapply Revert "RegAllocFast: Rewrite and improve"" This reverts commit 55f9f87da2c2ad791b9e62cccb1c035e037444fa. Breaks following buildbots: http://lab.llvm.org:8011/builders/lldb-arm-ubuntu/builds/4306 http://lab.llvm.org:8011/builders/lldb-aarch64-ubuntu/builds/9154
2020-09-22 17:20:10 +08:00
; GCN: undef renamable $vgpr3 = GLOBAL_LOAD_DWORD renamable $vgpr0_vgpr1, 0, 0, 0, 0, implicit $exec, implicit-def $vgpr2_vgpr3
; GCN: GLOBAL_STORE_DWORD killed renamable $vgpr0_vgpr1, undef renamable $vgpr3, 0, 0, 0, 0, implicit $exec
; GCN: SI_SPILL_V64_SAVE killed $vgpr2_vgpr3, %stack.1, $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr32, 0, implicit $exec :: (store 8 into %stack.1, align 4, addrspace 5)
RegAllocFast: Make self loop live-out heuristic more aggressive This currently has no impact on code, but prevents sizeable code size regressions after D52010. This prevents spilling and reloading all values inside blocks that loop back. Add a baseline test which would regress without this patch.
2020-09-01 03:09:50 +08:00
; GCN: S_CBRANCH_EXECZ %bb.1, implicit $exec
; GCN: bb.2:
; GCN: S_ENDPGM 0
bb.0:
liveins: $vgpr0_vgpr1
%0:vreg_64 = COPY $vgpr0_vgpr1
bb.1:
undef %1.sub1:vreg_64 = GLOBAL_LOAD_DWORD %0, 0, 0, 0, 0, implicit $exec
GLOBAL_STORE_DWORD %0, undef %1.sub1, 0, 0, 0, 0, implicit $exec
S_CBRANCH_EXECZ %bb.1, implicit $exec
bb.2:
S_ENDPGM 0
...