derek.holloway
7502bf64a4
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37 lines
1.5 KiB
YAML
37 lines
1.5 KiB
YAML
# RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx900 -passes="require<machine-loops>,si-late-branch-lowering,print<machine-loops>" -debug-pass-manager -filetype=null %s 2>&1 | FileCheck %s
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# Test that MachineLoopInfo is preserved when splitting a block inside a loop
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# due to early termination handling.
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# CHECK: Running analysis: MachineLoopAnalysis on early_term_in_loop
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# CHECK-NEXT: Running analysis: MachineDominatorTreeAnalysis on early_term_in_loop
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# CHECK-NEXT: Running pass: SILateBranchLoweringPass on early_term_in_loop
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# CHECK-NEXT: Running pass: MachineLoopPrinterPass on early_term_in_loop
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# CHECK-NEXT: Machine loop info for machine function 'early_term_in_loop':
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# CHECK-NOT: Running analysis: MachineLoopAnalysis on early_term_in_loop
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# CHECK-NEXT: Loop at depth 1 containing: %bb.1<header><exiting>,%bb.4<latch><exiting>
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---
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name: early_term_in_loop
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tracksRegLiveness: true
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body: |
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bb.0:
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successors: %bb.1
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$vgpr0 = V_MOV_B32_e32 0, implicit $exec
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; Loop header contains SI_EARLY_TERMINATE_SCC0 followed by more instructions.
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; This triggers block splitting. Both bb.1 and bb.4 must remain in the loop.
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bb.1:
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liveins: $vgpr0
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successors: %bb.1, %bb.2
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S_CMP_LG_U32 0, 1, implicit-def $scc
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SI_EARLY_TERMINATE_SCC0 implicit $scc, implicit $exec
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$vgpr1 = V_MOV_B32_e32 1, implicit $exec
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S_CBRANCH_SCC1 %bb.1, implicit $scc
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bb.2:
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liveins: $vgpr0, $vgpr1
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EXP_DONE 0, $vgpr0, $vgpr0, $vgpr0, $vgpr0, -1, -1, 15, implicit $exec
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S_ENDPGM 0
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...
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