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4a7333a0ad
Dead defs were being removed from the live set (in stepForward), but registers clobbered by regmasks weren't (more specifically, they were actually removed by removeRegsInMask, but then they were added back in). llvm-svn: 331219
40 lines
1.8 KiB
YAML
40 lines
1.8 KiB
YAML
# RUN: llc -march=hexagon -verify-machineinstrs -run-pass prologepilog -o - %s | FileCheck %s
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# The PS_vstorerw_ai of W0 would normally expand into stores of V0 and V1,
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# but both are clobbered by the regmask. Only V0 is re-defined before the
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# store, so only V0 should be stored. LivePhysRegs didn't correctly remove
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# registers clobbered by regmasks, so V1 also appeared to be live and was
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# stored as well. This resulted in the "using undefined physical register"
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# error.
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# This will fail to compile with -verify-machineinstrs, but we can also check
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# directly if the output is correct.
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# CHECK: J2_call &__hexagon_divsi3
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# CHECK: $v0 = V6_lvsplatw
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# CHECK: V6_vS32b_ai $r29, 128, {{.*}} $v0
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# CHECK-NOT: V6_vS32b_ai $r29, 192, {{.*}} $v1
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name: f0
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tracksRegLiveness: true
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stack:
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- { id: 0, offset: 0, size: 128, alignment: 128 }
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- { id: 1, offset: 128, size: 128, alignment: 128 }
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- { id: 2, offset: 384, size: 128, alignment: 128 }
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body: |
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bb.0:
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renamable $r0 = PS_fi %stack.0, 0
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ADJCALLSTACKDOWN 0, 0, implicit-def $r29, implicit-def dead $r30, implicit $r31, implicit $r30, implicit $r29
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renamable $w0 = PS_vloadrw_ai %stack.2, 0 :: (load 128 from %stack.2)
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V6_vS32b_ai killed renamable $r0, 0, renamable $v1 :: (store 64 into %stack.0, align 128)
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$r0 = A2_tfrsi 0
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renamable $r1 = L2_loadri_io %stack.0, 4 :: (load 4 from %stack.0 + 4)
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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
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ADJCALLSTACKUP 0, 0, implicit-def dead $r29, implicit-def dead $r30, implicit-def dead $r31, implicit $r29
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renamable $v0 = V6_lvsplatw killed renamable $r0
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PS_vstorerw_ai %stack.1, 0, killed renamable $w0 :: (store 128 into %stack.1)
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...
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