derek.holloway
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34 lines
1.2 KiB
YAML
34 lines
1.2 KiB
YAML
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
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# RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx900 -verify-coalescing -run-pass=register-coalescer -o - %s | FileCheck %s
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# Check that there's no "Live segment doesn't end at a valid
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# instruction" failure after coalescing %0 into %2, which is
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# ultimately a pair of dead copies.
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---
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name: coalesce_into_dead_subreg_copy
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tracksRegLiveness: true
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machineFunctionInfo:
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isEntryFunction: true
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scratchRSrcReg: '$sgpr0_sgpr1_sgpr2_sgpr3'
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stackPtrOffsetReg: '$sgpr32'
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occupancy: 8
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body: |
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; CHECK-LABEL: name: coalesce_into_dead_subreg_copy
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; CHECK: bb.0:
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; CHECK-NEXT: successors: %bb.1(0x80000000)
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: dead [[S_LOAD_DWORDX2_IMM:%[0-9]+]]:sreg_64_xexec = S_LOAD_DWORDX2_IMM undef %1:sgpr_64, 24, 0 :: (dereferenceable invariant load (s64), addrspace 4)
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; CHECK-NEXT: S_BRANCH %bb.1
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: bb.1:
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bb.0:
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%0:sreg_64_xexec = S_LOAD_DWORDX2_IMM undef %1:sgpr_64, 24, 0 :: (dereferenceable invariant load (s64), addrspace 4)
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undef %2.sub0:sreg_64 = COPY %0.sub0:sreg_64_xexec
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%2.sub1:sreg_64 = COPY killed %0.sub1:sreg_64_xexec
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S_BRANCH %bb.1
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bb.1:
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...
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