d394d153fb
This patch implements a printer and parser for the S_WAITCNT mask. It prints the mask in a human-readable format, showing the counter values like `Vmcnt_<NUM>_Expcnt_<NUM>_Lgkmcnt_<NUM>`. The format matches the printing style of S_WAITCNT_DEPCTR. For example: ``` S_WAITCNT .Vmcnt_0_Expcnt_0_Lgkmcnt_0 S_WAITCNT .Expcnt_0 S_WAITCNT .AllOff ``` Counters at their maximum value (meaning "don't wait") are omitted. When all counters are at max, `.AllOff` is printed. Co-Authored-By: Claude Opus 4 <noreply@anthropic.com>
27 lines
886 B
YAML
27 lines
886 B
YAML
# RUN: llc -mtriple=amdgcn -mcpu=gfx900 -run-pass=si-insert-waitcnts -verify-machineinstrs %s -o - | FileCheck -check-prefix=GCN %s
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# Check that the waitcnt propagates info in the case of a single basic block loop
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# GCN-LABEL: waitcnt-loop-single-basic-block
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# GCN: bb.0
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# GCN: S_WAITCNT .Vmcnt_0{{$}}
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# GCN-NEXT: GLOBAL_STORE_DWORD
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# GCN: S_WAITCNT .Vmcnt_1
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# GCN-NEXT: GLOBAL_STORE_DWORD
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...
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name: waitcnt-loop-single-basic-block
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body: |
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bb.0:
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S_BRANCH %bb.1
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bb.1:
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GLOBAL_STORE_DWORD $vgpr7_vgpr8, $vgpr11, 0, 0, implicit $exec
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$vgpr21 = GLOBAL_LOAD_DWORD $vgpr4_vgpr5, 0, 0, implicit $exec
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$vgpr10 = GLOBAL_LOAD_DWORD $vgpr10_vgpr11, 0, 0, implicit $exec
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GLOBAL_STORE_DWORD $vgpr14_vgpr15, $vgpr21, 0, 0, implicit $exec
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$vgpr11 = GLOBAL_LOAD_DWORD $vgpr11_vgpr12, 0, 0, implicit $exec
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S_CBRANCH_SCC1 %bb.1, implicit $scc
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bb.2:
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S_ENDPGM 0
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...
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