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llvm-mirror/test/CodeGen/AMDGPU/splitkit-copy-bundle.mir
Stanislav Mekhanoshin ff3db7b010 Unbundle KILL bundles in VirtRegRewriter 
SplitKit forms invalid COPY subreg bundles without a leading
BUNDLE instruction. That manifests itself in post-RA scheduler
counting instruction and asserting on "Instruction count mismatch".

The bundle shall be undone by VirtRegRewriter::expandCopyBundle(),
but it does not because VirtRegRewriter::handleIdentityCopy() can
turn COPY bundle into a KILL bundle.

Process KILLs as well.

Differential Revision: https://reviews.llvm.org/D85484
2020-08-10 11:58:37 -07:00

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# RUN: llc -march=amdgcn -mcpu=gfx900 -run-pass=greedy -o - -verify-machineinstrs %s | FileCheck -check-prefixes=MIR,RA %s
# RUN: llc -march=amdgcn -mcpu=gfx900 -run-pass=greedy,virtregrewriter,post-RA-sched -o - -verify-machineinstrs %s | FileCheck -check-prefixes=MIR,VR %s
# RUN: llc -march=amdgcn -mcpu=gfx900 -start-before=greedy -o - -verify-machineinstrs %s | FileCheck -check-prefix=ASM %s
---
# MIR-LABEL: name: splitkit_copy_bundle
# RA: undef %4.sub0_sub1_sub2_sub3_sub4_sub5_sub6_sub7_sub8_sub9_sub10_sub11_sub12_sub13_sub14_sub15:sgpr_1024 = COPY %5.sub0_sub1_sub2_sub3_sub4_sub5_sub6_sub7_sub8_sub9_sub10_sub11_sub12_sub13_sub14_sub15 {
# RA-NEXT: internal %4.sub12_sub13_sub14_sub15_sub16_sub17_sub18_sub19_sub20_sub21_sub22_sub23_sub24_sub25_sub26_sub27:sgpr_1024 = COPY %5.sub12_sub13_sub14_sub15_sub16_sub17_sub18_sub19_sub20_sub21_sub22_sub23_sub24_sub25_sub26_sub27
# RA-NEXT: internal %4.sub28_sub29:sgpr_1024 = COPY %5.sub28_sub29
# RA-NEXT: }
# RA: undef %6.sub0_sub1_sub2_sub3_sub4_sub5_sub6_sub7_sub8_sub9_sub10_sub11_sub12_sub13_sub14_sub15:sgpr_1024 = COPY %4.sub0_sub1_sub2_sub3_sub4_sub5_sub6_sub7_sub8_sub9_sub10_sub11_sub12_sub13_sub14_sub15 {
# RA-NEXT: internal %6.sub12_sub13_sub14_sub15_sub16_sub17_sub18_sub19_sub20_sub21_sub22_sub23_sub24_sub25_sub26_sub27:sgpr_1024 = COPY %4.sub12_sub13_sub14_sub15_sub16_sub17_sub18_sub19_sub20_sub21_sub22_sub23_sub24_sub25_sub26_sub27
# RA-NEXT: internal %6.sub28_sub29:sgpr_1024 = COPY %4.sub28_sub29
# RA-NEXT: }
# RA: undef %4.sub0_sub1_sub2_sub3_sub4_sub5_sub6_sub7_sub8_sub9_sub10_sub11_sub12_sub13_sub14_sub15:sgpr_1024 = COPY %6.sub0_sub1_sub2_sub3_sub4_sub5_sub6_sub7_sub8_sub9_sub10_sub11_sub12_sub13_sub14_sub15 {
# RA-NEXT: internal %4.sub12_sub13_sub14_sub15_sub16_sub17_sub18_sub19_sub20_sub21_sub22_sub23_sub24_sub25_sub26_sub27:sgpr_1024 = COPY %6.sub12_sub13_sub14_sub15_sub16_sub17_sub18_sub19_sub20_sub21_sub22_sub23_sub24_sub25_sub26_sub27
# RA-NEXT: internal %4.sub28_sub29:sgpr_1024 = COPY %6.sub28_sub29
# RA-NEXT: }
# VR: renamable $sgpr80_sgpr81_sgpr82_sgpr83_sgpr84_sgpr85_sgpr86_sgpr87_sgpr88_sgpr89_sgpr90_sgpr91_sgpr92_sgpr93_sgpr94_sgpr95 = KILL undef renamable $sgpr80_sgpr81_sgpr82_sgpr83_sgpr84_sgpr85_sgpr86_sgpr87_sgpr88_sgpr89_sgpr90_sgpr91_sgpr92_sgpr93_sgpr94_sgpr95
# VR-NEXT: renamable $sgpr96_sgpr97 = KILL undef renamable $sgpr96_sgpr97
# ASM-LABEL: {{^}}splitkit_copy_bundle:
# ASM: ; implicit-def: $sgpr34_sgpr35
# ASM-NEXT: ; implicit-def: $sgpr98_sgpr99
# ASM-NEXT: ; kill: def $sgpr80_sgpr81_sgpr82_sgpr83_sgpr84_sgpr85_sgpr86_sgpr87_sgpr88_sgpr89_sgpr90_sgpr91_sgpr92_sgpr93_sgpr94_sgpr95 killed $sgpr80_sgpr81_sgpr82_sgpr83_sgpr84_sgpr85_sgpr86_sgpr87_sgpr88_sgpr89_sgpr90_sgpr91_sgpr92_sgpr93_sgpr94_sgpr95
# ASM-NEXT: ; kill: def $sgpr96_sgpr97 killed $sgpr96_sgpr97
name: splitkit_copy_bundle
tracksRegLiveness: true
machineFunctionInfo:
scratchRSrcReg: '$sgpr0_sgpr1_sgpr2_sgpr3'
stackPtrOffsetReg: '$sgpr32'
body: |
bb.0:
%0:sreg_64 = IMPLICIT_DEF
%1:sreg_64 = IMPLICIT_DEF
undef %2.sub1:sgpr_1024 = S_MOV_B32 -1
%2.sub0:sgpr_1024 = S_MOV_B32 -1
undef %3.sub0:sgpr_1024 = S_MOV_B32 0
bb.1:
%2.sub2:sgpr_1024 = COPY %2.sub0
%2.sub3:sgpr_1024 = COPY %2.sub1
%2.sub4:sgpr_1024 = COPY %2.sub0
%2.sub5:sgpr_1024 = COPY %2.sub1
%2.sub6:sgpr_1024 = COPY %2.sub0
%2.sub7:sgpr_1024 = COPY %2.sub1
%2.sub8:sgpr_1024 = COPY %2.sub0
%2.sub9:sgpr_1024 = COPY %2.sub1
%2.sub10:sgpr_1024 = COPY %2.sub0
%2.sub11:sgpr_1024 = COPY %2.sub1
%2.sub12:sgpr_1024 = COPY %2.sub0
%2.sub13:sgpr_1024 = COPY %2.sub1
%2.sub14:sgpr_1024 = COPY %2.sub0
%2.sub15:sgpr_1024 = COPY %2.sub1
%2.sub16:sgpr_1024 = COPY %2.sub0
%2.sub17:sgpr_1024 = COPY %2.sub1
%2.sub18:sgpr_1024 = COPY %2.sub0
%2.sub19:sgpr_1024 = COPY %2.sub1
%2.sub20:sgpr_1024 = COPY %2.sub0
%2.sub21:sgpr_1024 = COPY %2.sub1
%2.sub22:sgpr_1024 = COPY %2.sub0
%2.sub23:sgpr_1024 = COPY %2.sub1
%2.sub24:sgpr_1024 = COPY %2.sub0
%2.sub25:sgpr_1024 = COPY %2.sub1
%2.sub26:sgpr_1024 = COPY %2.sub0
%2.sub27:sgpr_1024 = COPY %2.sub1
%2.sub28:sgpr_1024 = COPY %2.sub0
%2.sub29:sgpr_1024 = COPY %2.sub1
%3.sub1:sgpr_1024 = COPY %3.sub0
%3.sub2:sgpr_1024 = COPY %3.sub0
%3.sub3:sgpr_1024 = COPY %3.sub0
%3.sub4:sgpr_1024 = COPY %3.sub0
%3.sub5:sgpr_1024 = COPY %3.sub0
%3.sub6:sgpr_1024 = COPY %3.sub0
%3.sub7:sgpr_1024 = COPY %3.sub0
%3.sub8:sgpr_1024 = COPY %3.sub0
%3.sub9:sgpr_1024 = COPY %3.sub0
%3.sub10:sgpr_1024 = COPY %3.sub0
%3.sub11:sgpr_1024 = COPY %3.sub0
%3.sub12:sgpr_1024 = COPY %3.sub0
%3.sub13:sgpr_1024 = COPY %3.sub0
%3.sub14:sgpr_1024 = COPY %3.sub0
%3.sub15:sgpr_1024 = COPY %3.sub0
%3.sub16:sgpr_1024 = COPY %3.sub0
%3.sub17:sgpr_1024 = COPY %3.sub0
%3.sub18:sgpr_1024 = COPY %3.sub0
%3.sub19:sgpr_1024 = COPY %3.sub0
%3.sub20:sgpr_1024 = COPY %3.sub0
%3.sub21:sgpr_1024 = COPY %3.sub0
%3.sub22:sgpr_1024 = COPY %3.sub0
%3.sub23:sgpr_1024 = COPY %3.sub0
%3.sub24:sgpr_1024 = COPY %3.sub0
%3.sub25:sgpr_1024 = COPY %3.sub0
%3.sub26:sgpr_1024 = COPY %3.sub0
%3.sub27:sgpr_1024 = COPY %3.sub0
%3.sub28:sgpr_1024 = COPY %3.sub0
%3.sub29:sgpr_1024 = COPY %3.sub0
%3.sub30:sgpr_1024 = COPY %3.sub0
%3.sub31:sgpr_1024 = COPY %3.sub0
bb.2:
S_NOP 0, implicit %0, implicit %1, csr_amdgpu_highregs
S_CBRANCH_VCCNZ %bb.1, implicit undef $vcc
S_BRANCH %bb.2
...
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