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# Using a trick to run register-coalescer twice, that way
# liveintervals should be preserved while running the machine verifier.
#
# 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
# 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
---
name: test_pass
tracksRegLiveness: true
body: |
bb.0:
A2_nop implicit-def %0:doubleregs
A2_nop implicit-def dead %0.isub_lo, implicit-def %0.isub_hi, implicit %0
A2_nop implicit %0.isub_hi
...
---
name: test_fail
tracksRegLiveness: true
body: |
bb.0:
A2_nop implicit-def %0:doubleregs
A2_nop implicit-def dead %0.isub_lo, implicit-def %0.isub_hi, implicit %0
A2_nop implicit %0.isub_lo
A2_nop implicit-def %1:doubleregs
A2_nop implicit-def dead %1.isub_lo, implicit-def dead %1.isub_hi, implicit %1
A2_nop implicit %1
A2_nop implicit-def dead %2:doubleregs
A2_nop implicit %2
...
###############################################################################
# We are expecting four "Bad machine code" when subregister liveness is used.
#
# CHECK-SUB-NOT: Bad machine code
#
# CHECK-SUB: Bad machine code: Live range continues after dead def flag
# CHECK_SUB-NEXT: function: test_fail
# CHECK-SUB: v. register: %0
# CHECK-SUB: lanemask: 0000000000000002
#
# CHECK-SUB-NOT: Bad machine code
#
# CHECK-SUB: Bad machine code: Live range continues after dead def flag
# CHECK-SUB-NEXT: function: test_fail
# CHECK-SUB: v. register: %1
# CHECK-SUB: lanemask: 0000000000000002
#
# CHECK-SUB-NOT: Bad machine code
#
# CHECK-SUB: Bad machine code: Live range continues after dead def flag
# CHECK-SUB-NEXT: function: test_fail
# CHECK-SUB: v. register: %1
# CHECK-SUB: lanemask: 0000000000000001
#
# CHECK-SUB: Bad machine code: Live range continues after dead def flag
# CHECK-SUB-NEXT: function: test_fail
# CHECK: v. register: %2
#
# CHECK-SUB-NOT: Bad machine code
###############################################################################
# Without subregister liveness we only detect one of the failing scenarios.
#
# CHECK-NOSUB-NOT: Bad machine code
#
# CHECK-NOSUB: Bad machine code: Live range continues after dead def flag
# CHECK-NOSUB-NEXT: function: test_fail
# CHECK: v. register: %2
#
# CHECK-NOSUB-NOT: Bad machine code
|
