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TheRock/compiler/amd-llvm/llvm/test/CodeGen/Hexagon/livephysregs-regmask-clobber.mir
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# RUN: llc -mtriple=hexagon -verify-machineinstrs -run-pass prologepilog -o - %s | FileCheck %s
# The PS_vstorerw_ai of W0 would normally expand into stores of V0 and V1,
# but both are clobbered by the regmask. Only V0 is re-defined before the
# store, so only V0 should be stored. LivePhysRegs didn't correctly remove
# registers clobbered by regmasks, so V1 also appeared to be live and was
# stored as well. This resulted in the "using undefined physical register"
# error.
# This will fail to compile with -verify-machineinstrs, but we can also check
# directly if the output is correct.
# CHECK: J2_call &__hexagon_divsi3
# CHECK: $v0 = V6_lvsplatw
# CHECK: V6_vS32b_ai $r29, 128, {{.*}} $v0
# CHECK-NOT: V6_vS32b_ai $r29, 192, {{.*}} $v1
name: f0
tracksRegLiveness: true
frameInfo:
adjustsStack: true
stack:
- { id: 0, offset: 0, size: 128, alignment: 128 }
- { id: 1, offset: 128, size: 128, alignment: 128 }
- { id: 2, offset: 384, size: 128, alignment: 128 }
body: |
bb.0:
renamable $r0 = PS_fi %stack.0, 0
ADJCALLSTACKDOWN 0, 0, implicit-def $r29, implicit-def dead $r30, implicit $r31, implicit $r30, implicit $r29
renamable $w0 = PS_vloadrw_ai %stack.2, 0 :: (load (s1024) from %stack.2)
V6_vS32b_ai killed renamable $r0, 0, renamable $v1 :: (store (s512) into %stack.0, align 128)
$r0 = A2_tfrsi 0
renamable $r1 = L2_loadri_io %stack.0, 4 :: (load (s32) from %stack.0 + 4)
J2_call &__hexagon_divsi3, hexagoncsr, implicit-def dead $pc, implicit-def dead $r31, implicit $r29, implicit killed $r0, implicit killed $r1, implicit-def $r29, implicit-def $r0
ADJCALLSTACKUP 0, 0, implicit-def dead $r29, implicit-def dead $r30, implicit-def dead $r31, implicit $r29
renamable $v0 = V6_lvsplatw killed renamable $r0
PS_vstorerw_ai %stack.1, 0, killed renamable $w0 :: (store (s1024) into %stack.1)
...