derek.holloway
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78 lines
2.1 KiB
YAML
78 lines
2.1 KiB
YAML
# RUN: llc -mtriple=hexagon -run-pass hexagon-peephole \
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# RUN: -disable-hexagon-optszext=false \
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# RUN: -disable-hexagon-opt-ext-to-64=false -o - %s | FileCheck %s
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# Test coverage for HexagonPeephole:
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# 1) SXTW + COPY isub_lo optimization
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# 2) A4_combineir(0, r) + COPY isub_lo optimization
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# 3) S2_lsr_i_p(d, 32) + COPY isub_lo -> COPY isub_hi
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--- |
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define void @test_sxtw_copy() { ret void }
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define void @test_combine_copy() { ret void }
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define void @test_lsr_copy() { ret void }
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...
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---
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# SXTW + COPY isub_lo should be peepholed: the COPY should use the
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# original 32-bit source directly instead of extracting from the sxtw result.
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# CHECK-LABEL: name: test_sxtw_copy
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# CHECK: %2:intregs = COPY %0
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name: test_sxtw_copy
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tracksRegLiveness: true
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registers:
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- { id: 0, class: intregs }
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- { id: 1, class: doubleregs }
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- { id: 2, class: intregs }
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body: |
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bb.0:
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liveins: $r0
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%0:intregs = COPY $r0
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%1:doubleregs = A2_sxtw %0
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%2:intregs = COPY %1.isub_lo
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$r0 = COPY %2
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J2_jumpr $r31, implicit-def dead $pc, implicit killed $r0
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...
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---
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# A4_combineir(0, r) + COPY isub_lo optimization: the COPY should use
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# the 32-bit source register directly.
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# CHECK-LABEL: name: test_combine_copy
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# CHECK: %2:intregs = COPY %0
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name: test_combine_copy
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tracksRegLiveness: true
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registers:
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- { id: 0, class: intregs }
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- { id: 1, class: doubleregs }
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- { id: 2, class: intregs }
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body: |
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bb.0:
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liveins: $r0
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%0:intregs = COPY $r0
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%1:doubleregs = A4_combineir 0, %0
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%2:intregs = COPY %1.isub_lo
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$r0 = COPY %2
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J2_jumpr $r31, implicit-def dead $pc, implicit killed $r0
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...
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---
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# S2_lsr_i_p(d, 32) + COPY isub_lo should be transformed to
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# COPY isub_hi from the original double register.
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# CHECK-LABEL: name: test_lsr_copy
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# CHECK: %2:intregs = COPY %0.isub_hi
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name: test_lsr_copy
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tracksRegLiveness: true
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registers:
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- { id: 0, class: doubleregs }
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- { id: 1, class: doubleregs }
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- { id: 2, class: intregs }
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body: |
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bb.0:
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liveins: $d0
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%0:doubleregs = COPY $d0
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%1:doubleregs = S2_lsr_i_p %0, 32
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%2:intregs = COPY %1.isub_lo
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$r0 = COPY %2
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J2_jumpr $r31, implicit-def dead $pc, implicit killed $r0
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...
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