LLVM ERROR: Cannot emit physreg copy instruction

[fredrikekre]

I get

LLVM ERROR: Cannot emit physreg copy instruction

on 16652a6 with Travis Linux, see https://travis-ci.org/github/fredrikekre/Literate.jl/jobs/672110054#L186

Restarting gave the same error and there are no more stacktrace info.

[vtjnash]

I'm seeing this too

[omus]

☝️ I'm also seeing this on private packages

[vtjnash]

So the specific error I get is Cannot copy ZMM4 to RDI from llvm::X86InstrInfo::copyPhysReg from

bb.7.vector.body:
; predecessors: %bb.6, %bb.7
  successors: %bb.7(0x7c000000), %bb.8(0x04000000); %bb.7(96.88%), %bb.8(3.12%)
  liveins: $rax, $rdx, $rsi, $r8, $r12, $r13, $r14, $zmm0, $zmm1, $zmm2, $zmm3, $r9d
  renamable $zmm4 = VMOVDQU64Zrm renamable $r13, 8, renamable $rsi, 8, $noreg, debug-location !60506 :: (load 64 from %ir.34, align 8, !tbaa !11991); tuple.jl:24 @[ tuple.jl:61 @[ array.jl:1605 ] ]
  renamable $zmm5 = VMOVDQU64Zrm renamable $r13, 8, renamable $rsi, 72, $noreg, debug-location !60506 :: (load 64 from %ir.36, align 8, !tbaa !11991); tuple.jl:24 @[ tuple.jl:61 @[ array.jl:1605 ] ]
  renamable $zmm6 = VMOVDQU64Zrm renamable $r13, 8, renamable $rsi, 136, $noreg, debug-location !60506 :: (load 64 from %ir.38, align 8, !tbaa !11991); tuple.jl:24 @[ tuple.jl:61 @[ array.jl:1605 ] ]
  renamable $zmm7 = VMOVDQU64Zrm renamable $r13, 8, renamable $rsi, 200, $noreg, debug-location !60506 :: (load 64 from %ir.40, align 8, !tbaa !11991); tuple.jl:24 @[ tuple.jl:61 @[ array.jl:1605 ] ]
  renamable $rdi = COPY killed renamable $zmm4
  renamable $rdi = ADD64ri32 killed renamable $rdi(tied-def 0), 8, implicit-def dead $eflags
  renamable $rbp = COPY killed renamable $zmm5
  renamable $rbp = ADD64ri32 killed renamable $rbp(tied-def 0), 8, implicit-def dead $eflags
  renamable $rbx = COPY killed renamable $zmm6
  renamable $rbx = ADD64ri32 killed renamable $rbx(tied-def 0), 8, implicit-def dead $eflags
  renamable $rcx = COPY killed renamable $zmm7
  renamable $rcx = ADD64ri32 killed renamable $rcx(tied-def 0), 8, implicit-def dead $eflags
  renamable $k1 = KSET1W debug-location !60502; array.jl:221 @[ array.jl:1605 ]
  early-clobber renamable $zmm4, dead renamable $k1 = VPGATHERQQZrm undef renamable $zmm4(tied-def 0), killed renamable $k1(tied-def 1), $noreg, 1, killed renamable $rdi, 0, $noreg, debug-location !60502 :: (load 64, align 8, !tbaa 
!11878); array.jl:221 @[ array.jl:1605 ]
  renamable $zmm0 = VPADDQZrr killed renamable $zmm4, killed renamable $zmm0, debug-location !60507; int.jl:86 @[ array.jl:1605 ]
  renamable $k1 = KSET1W debug-location !60502; array.jl:221 @[ array.jl:1605 ]
  early-clobber renamable $zmm4, dead renamable $k1 = VPGATHERQQZrm undef renamable $zmm4(tied-def 0), killed renamable $k1(tied-def 1), $noreg, 1, killed renamable $rbp, 0, $noreg, debug-location !60502 :: (load 64, align 8, !tbaa 
!11878); array.jl:221 @[ array.jl:1605 ]
  renamable $zmm1 = VPADDQZrr killed renamable $zmm4, killed renamable $zmm1, debug-location !60507; int.jl:86 @[ array.jl:1605 ]
  renamable $k1 = KSET1W debug-location !60502; array.jl:221 @[ array.jl:1605 ]
  early-clobber renamable $zmm4, dead renamable $k1 = VPGATHERQQZrm undef renamable $zmm4(tied-def 0), killed renamable $k1(tied-def 1), $noreg, 1, killed renamable $rbx, 0, $noreg, debug-location !60502 :: (load 64, align 8, !tbaa 
!11878); array.jl:221 @[ array.jl:1605 ]
  renamable $zmm2 = VPADDQZrr killed renamable $zmm4, killed renamable $zmm2, debug-location !60507; int.jl:86 @[ array.jl:1605 ]
  renamable $k1 = KSET1W debug-location !60502; array.jl:221 @[ array.jl:1605 ]
  early-clobber renamable $zmm4, dead renamable $k1 = VPGATHERQQZrm undef renamable $zmm4(tied-def 0), killed renamable $k1(tied-def 1), $noreg, 1, killed renamable $rcx, 0, $noreg, debug-location !60502 :: (load 64, align 8, !tbaa 
!11878); array.jl:221 @[ array.jl:1605 ]
  renamable $zmm3 = VPADDQZrr killed renamable $zmm4, killed renamable $zmm3, debug-location !60507; int.jl:86 @[ array.jl:1605 ]
  renamable $rsi = ADD64ri32 killed renamable $rsi(tied-def 0), 32, implicit-def dead $eflags
  CMP64rr renamable $rdx, renamable $rsi, implicit-def $eflags
  JCC_1 %bb.7, 5, implicit $eflags

https://gist.github.com/vtjnash/633ae4c495e0369633018138f2c2ac2b

Anyone know if something changed recently?

[sethaxen]

I'm seeing this as well.

[chriselrod]

My git bisect blames 78e4c2d

[DilumAluthge]

Also, the latest daily PkgEval report (https://github.com/JuliaCI/NanosoldierReports/blob/master/pkgeval/by_date/2020-04/07/report.md) says:

In total, 3376 packages were tested, out of which 646 succeeded, 2381 failed and 349 were skipped.

Many of these failures are due to this issue. See e.g. https://github.com/JuliaCI/NanosoldierReports/blob/master/pkgeval/by_date/2020-04/07/logs/Example/1.5.0-DEV-16652a6655.log:

Julia Version 1.5.0-DEV.585
Commit 16652a6655* (2020-04-07 09:45 UTC)
Platform Info:
  OS: Linux (x86_64-pc-linux-gnu)
  CPU: Intel(R) Xeon(R) Silver 4114 CPU @ 2.20GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-9.0.1 (ORCJIT, skylake)
Environment:
  JULIA_DEPOT_PATH = ::/usr/local/share/julia
  JULIA_NUM_THREADS = 2

  Resolving package versions...
LLVM ERROR: Cannot emit physreg copy instruction

[vtjnash]

Filed upstream also: https://bugs.llvm.org/show_bug.cgi?id=45906