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Method error during optimization #50276

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maleadt opened this issue Jun 23, 2023 · 1 comment · Fixed by #50312
Closed

Method error during optimization #50276

maleadt opened this issue Jun 23, 2023 · 1 comment · Fixed by #50312
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@topolarity
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compiler:optimizer Optimization passes (mostly in base/compiler/ssair/) kind:bug Indicates an unexpected problem or unintended behavior
Milestone
1.10

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@maleadt
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maleadt commented Jun 23, 2023

MWE:

df = (A = [missing], B = 1)
map(&, df.A , df.A , df.B > 1)
Internal error: encountered unexpected error in runtime:
MethodError(f=Base.string, args=(Expr(:&&, Expr(:call, :!==, :then_result, :SKIP_TOKEN), Expr(:call, :!==, :then_result, :UNDEF_TOKEN)),), world=0x00000000000015b0)
jl_method_error_bare at /source/src/gf.c:2204
jl_method_error at /source/src/gf.c:2222
jl_lookup_generic_ at /source/src/gf.c:3053 [inlined]
ijl_apply_generic at /source/src/gf.c:3068
macro expansion at ./error.jl:231 [inlined]
perform_lifting! at ./compiler/ssair/passes.jl:768
lift_comparison_leaves! at ./compiler/ssair/passes.jl:601
lift_comparison! at ./compiler/ssair/passes.jl:553 [inlined]
sroa_pass! at ./compiler/ssair/passes.jl:1011
run_passes at ./compiler/optimize.jl:489
run_passes at ./compiler/optimize.jl:504 [inlined]
optimize at ./compiler/optimize.jl:453 [inlined]
_typeinf at ./compiler/typeinfer.jl:272
typeinf at ./compiler/typeinfer.jl:216

As seen on PkgEval during testing of DataFramesMeta.jl.

Bisected to #49882, cc @topolarity.
@maleadt maleadt added kind:bug Indicates an unexpected problem or unintended behavior compiler:optimizer Optimization passes (mostly in base/compiler/ssair/) labels Jun 23, 2023
@maleadt maleadt added this to the 1.10 milestone Jun 23, 2023
@topolarity
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Uh oh, looks like this call-out was an issue after all.

Thanks for the report - will investigate

@topolarity topolarity self-assigned this Jun 23, 2023
topolarity added a commit to topolarity/julia that referenced this issue Jun 27, 2023
@topolarity
optimize: Handle path-excluded Core.ifelse arguments
ed47b3e 
It's possible for PiNodes to effectively imply statically the condition
of a Core.ifelse. For example:
```julia
    23 ─ %60  = Core.ifelse(%47, false, true)::Bool
    │    %61  = Core.ifelse(%47, %58, false)::Union{Missing, Bool}
    25 ─        goto JuliaLang#27 if not %60
    26 ─ %65  = π (%61, Bool)
    └───        ...
```

In basic block JuliaLang#26, the PiNode gives us enough information to conclude
that `%47 === false` if control flow reaches that point. The previous
code incorrectly assumed that this kind of pruning would only be done
for PhiNodes.

Resolves JuliaLang#50276.
topolarity added a commit to topolarity/julia that referenced this issue Jun 27, 2023
@topolarity
optimize: Handle path-excluded Core.ifelse arguments
cb51a92 
It's possible for PiNodes to effectively imply statically the condition
of a Core.ifelse. For example:
```julia
    23 ─ %60  = Core.ifelse(%47, false, true)::Bool
    │    %61  = Core.ifelse(%47, %58, false)::Union{Missing, Bool}
    25 ─        goto JuliaLang#27 if not %60
    26 ─ %65  = π (%61, Bool)
    └───        ...
```

In basic block JuliaLang#26, the PiNode gives us enough information to conclude
that `%47 === false` if control flow reaches that point. The previous
code incorrectly assumed that this kind of pruning would only be done
for PhiNodes.

Resolves JuliaLang#50276.
@topolarity topolarity mentioned this issue Jun 27, 2023
Merged
topolarity added a commit to topolarity/julia that referenced this issue Jun 28, 2023
@topolarity
optimize: Handle path-excluded Core.ifelse arguments
3352d22 
It's possible for PiNodes to effectively imply statically the condition
of a Core.ifelse. For example:
```julia
    23 ─ %60  = Core.ifelse(%47, false, true)::Bool
    │    %61  = Core.ifelse(%47, %58, false)::Union{Missing, Bool}
    25 ─        goto JuliaLang#27 if not %60
    26 ─ %65  = π (%61, Bool)
    └───        ...
```

In basic block JuliaLang#26, the PiNode gives us enough information to conclude
that `%47 === false` if control flow reaches that point. The previous
code incorrectly assumed that this kind of pruning would only be done
for PhiNodes.

Resolves JuliaLang#50276.
topolarity added a commit to topolarity/julia that referenced this issue Jun 28, 2023
@topolarity
optimize: Handle path-excluded Core.ifelse arguments
3450b84 
It's possible for PiNodes to effectively imply statically the condition
of a Core.ifelse. For example:
```julia
    23 ─ %60  = Core.ifelse(%47, false, true)::Bool
    │    %61  = Core.ifelse(%47, %58, false)::Union{Missing, Bool}
    25 ─        goto JuliaLang#27 if not %60
    26 ─ %65  = π (%61, Bool)
    └───        ...
```

In basic block JuliaLang#26, the PiNode gives us enough information to conclude
that `%47 === false` if control flow reaches that point. The previous
code incorrectly assumed that this kind of pruning would only be done
for PhiNodes.

Resolves JuliaLang#50276.
topolarity added a commit to topolarity/julia that referenced this issue Jun 28, 2023
@topolarity
optimize: Handle path-excluded Core.ifelse arguments
82987f5 
It's possible for PiNodes to effectively imply statically the condition
of a Core.ifelse. For example:
```julia
    23 ─ %60  = Core.ifelse(%47, false, true)::Bool
    │    %61  = Core.ifelse(%47, %58, false)::Union{Missing, Bool}
    25 ─        goto JuliaLang#27 if not %60
    26 ─ %65  = π (%61, Bool)
    └───        ...
```

In basic block JuliaLang#26, the PiNode gives us enough information to conclude
that `%47 === false` if control flow reaches that point. The previous
code incorrectly assumed that this kind of pruning would only be done
for PhiNodes.

Resolves JuliaLang#50276.
vtjnash pushed a commit that referenced this issue Jun 29, 2023
@topolarity
optimize: Handle path-excluded Core.ifelse arguments (#50312)
5db930e 
It's possible for PiNodes to effectively imply statically the condition
of a Core.ifelse. For example:
```julia
    23 ─ %60  = Core.ifelse(%47, false, true)::Bool
    │    %61  = Core.ifelse(%47, %58, false)::Union{Missing, Bool}
    25 ─        goto #27 if not %60
    26 ─ %65  = π (%61, Bool)
    └───        ...
```

In basic block #26, the PiNode gives us enough information to conclude
that `%47 === false` if control flow reaches that point. The previous
code incorrectly assumed that this kind of pruning would only be done
for PhiNodes.

Resolves #50276
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compiler:optimizer Optimization passes (mostly in base/compiler/ssair/) kind:bug Indicates an unexpected problem or unintended behavior
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optimizer: Handle path-excluded Core.ifelse arguments topolarity/julia
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@maleadt @topolarity