derek.holloway
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75 lines
2.5 KiB
YAML
75 lines
2.5 KiB
YAML
# Using a trick to run register-coalescer twice, that way
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# liveintervals should be preserved while running the machine verifier.
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#
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# RUN: not --crash llc -o - %s -mtriple=hexagon -enable-subreg-liveness=false -run-pass register-coalescer -verify-machineinstrs -run-pass register-coalescer 2>&1 | FileCheck -check-prefix=CHECK-NOSUB %s
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# RUN: not --crash llc -o - %s -mtriple=hexagon -enable-subreg-liveness=true -run-pass register-coalescer -verify-machineinstrs -run-pass register-coalescer 2>&1 | FileCheck -check-prefix=CHECK-SUB %s
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---
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name: test_pass
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tracksRegLiveness: true
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body: |
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bb.0:
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A2_nop implicit-def %0:doubleregs
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A2_nop implicit-def dead %0.isub_lo, implicit-def %0.isub_hi, implicit %0
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A2_nop implicit %0.isub_hi
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...
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---
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name: test_fail
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tracksRegLiveness: true
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body: |
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bb.0:
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A2_nop implicit-def %0:doubleregs
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A2_nop implicit-def dead %0.isub_lo, implicit-def %0.isub_hi, implicit %0
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A2_nop implicit %0.isub_lo
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A2_nop implicit-def %1:doubleregs
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A2_nop implicit-def dead %1.isub_lo, implicit-def dead %1.isub_hi, implicit %1
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A2_nop implicit %1
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A2_nop implicit-def dead %2:doubleregs
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A2_nop implicit %2
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...
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###############################################################################
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# We are expecting four "Bad machine code" when subregister liveness is used.
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#
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# CHECK-SUB-NOT: Bad machine code
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#
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# CHECK-SUB: Bad machine code: Live range continues after dead def flag
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# CHECK_SUB-NEXT: function: test_fail
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# CHECK-SUB: v. register: %0
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# CHECK-SUB: lanemask: 0000000000000002
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#
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# CHECK-SUB-NOT: Bad machine code
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#
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# CHECK-SUB: Bad machine code: Live range continues after dead def flag
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# CHECK-SUB-NEXT: function: test_fail
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# CHECK-SUB: v. register: %1
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# CHECK-SUB: lanemask: 0000000000000002
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#
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# CHECK-SUB-NOT: Bad machine code
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#
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# CHECK-SUB: Bad machine code: Live range continues after dead def flag
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# CHECK-SUB-NEXT: function: test_fail
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# CHECK-SUB: v. register: %1
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# CHECK-SUB: lanemask: 0000000000000001
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#
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# CHECK-SUB: Bad machine code: Live range continues after dead def flag
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# CHECK-SUB-NEXT: function: test_fail
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# CHECK: v. register: %2
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#
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# CHECK-SUB-NOT: Bad machine code
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###############################################################################
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# Without subregister liveness we only detect one of the failing scenarios.
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#
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# CHECK-NOSUB-NOT: Bad machine code
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#
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# CHECK-NOSUB: Bad machine code: Live range continues after dead def flag
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# CHECK-NOSUB-NEXT: function: test_fail
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# CHECK: v. register: %2
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#
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# CHECK-NOSUB-NOT: Bad machine code
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