Remove no-op specializations of only [NFC]
#52328
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Co-authored-by: matthias314 <[email protected]>
vtjnash
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aviatesk
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Nov 28, 2023
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The commit 68b4587 just merged has an extremely long commit message. Is that intended? |
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I guess we could have kept it shorter. |
LilithHafner
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Dec 9, 2023
An easily merged subset of @matthias314's JuliaLang#52296, separated from that PR at @mkitti's suggestion. I kept the low-but-nonzero value specializations for Tuple and Named tuple which offer better error messages. They may be removed with a future PR that improves the generic error message. To verify this is indeed a no-op ``` @code_llvm only(Ref(4)) @code_llvm only(Ref(nothing)) @code_llvm only('z') @code_llvm only((4,)) @code_llvm only((nothing,)) only((4,2)) @code_llvm only(Array{Int, 0}(undef)) @code_llvm only((;x=3)) only((;)) only((;x=2, y=4)) ``` Before ``` julia> @code_llvm only(Ref(4)) ; Function Signature: only(Base.RefValue{Int64}) ; @ iterators.jl:1563 within `only` define i64 @julia_only_2451({}* noundef nonnull align 8 dereferenceable(8) %"x::RefValue") #0 { top: ; ┌ @ refvalue.jl:59 within `getindex` ; │┌ @ Base.jl:49 within `getproperty` %0 = bitcast {}* %"x::RefValue" to i64* %.x = load i64, i64* %0, align 8 ; └└ ret i64 %.x } julia> @code_llvm only(Ref(nothing)) ; Function Signature: only(Base.RefValue{Nothing}) ; @ iterators.jl:1563 within `only` define void @julia_only_2519({}* noundef nonnull %"x::RefValue") #0 { top: ret void } julia> @code_llvm only('z') ; Function Signature: only(Char) ; @ iterators.jl:1565 within `only` define i32 @julia_only_2527(i32 zeroext %"x::Char") #0 { top: ret i32 %"x::Char" } julia> @code_llvm only((4,)) ; Function Signature: only(Tuple{Int64}) ; @ iterators.jl:1566 within `only` define i64 @julia_only_2529([1 x i64]* nocapture noundef nonnull readonly align 8 dereferenceable(8) %"x::Tuple") #0 { top: ; ┌ @ tuple.jl:31 within `getindex` %"x::Tuple[1]_ptr" = getelementptr inbounds [1 x i64], [1 x i64]* %"x::Tuple", i64 0, i64 0 ; └ %"x::Tuple[1]_ptr.unbox" = load i64, i64* %"x::Tuple[1]_ptr", align 8 ret i64 %"x::Tuple[1]_ptr.unbox" } julia> @code_llvm only((nothing,)) ; Function Signature: only(Tuple{Nothing}) ; @ iterators.jl:1566 within `only` define void @julia_only_2532() #0 { top: ret void } julia> only((4,2)) ERROR: ArgumentError: Tuple contains 2 elements, must contain exactly 1 element Stacktrace: [1] only(x::Tuple{Int64, Int64}) @ Base.Iterators ./iterators.jl:1567 [2] top-level scope @ REPL[6]:1 julia> @code_llvm only(Array{Int, 0}(undef)) ; Function Signature: only(Array{Int64, 0}) ; @ iterators.jl:1570 within `only` define i64 @julia_only_2779({}* noundef nonnull align 8 dereferenceable(16) %"a::Array") #0 { top: ; ┌ @ abstractarray.jl:1314 within `getindex` ; │┌ @ abstractarray.jl:1343 within `_getindex` ; ││┌ @ essentials.jl:817 within `getindex` %0 = bitcast {}* %"a::Array" to i64** %1 = load i64*, i64** %0, align 8 %2 = load i64, i64* %1, align 8 ; └└└ ret i64 %2 } julia> @code_llvm only((;x=3)) ; Function Signature: only(NamedTuple{(:x,), Tuple{Int64}}) ; @ iterators.jl:1571 within `only` define i64 @julia_only_2794([1 x i64]* nocapture noundef nonnull readonly align 8 dereferenceable(8) %"x::NamedTuple") #0 { top: ; ┌ @ abstractarray.jl:469 within `first` ; │┌ @ namedtuple.jl:165 within `iterate` @ namedtuple.jl:165 %"x::NamedTuple.x_ptr" = getelementptr inbounds [1 x i64], [1 x i64]* %"x::NamedTuple", i64 0, i64 0 ; └└ %"x::NamedTuple.x_ptr.unbox" = load i64, i64* %"x::NamedTuple.x_ptr", align 8 ret i64 %"x::NamedTuple.x_ptr.unbox" } julia> only((;)) ERROR: ArgumentError: NamedTuple contains 0 elements, must contain exactly 1 element Stacktrace: [1] only(x::@NamedTuple{}) @ Base.Iterators ./iterators.jl:1572 [2] top-level scope @ REPL[9]:1 julia> only((;x=2, y=4)) ERROR: ArgumentError: NamedTuple contains 2 elements, must contain exactly 1 element Stacktrace: [1] only(x::@NamedTuple{x::Int64, y::Int64}) @ Base.Iterators ./iterators.jl:1572 [2] top-level scope @ REPL[10]:1 ``` After ``` julia> @code_llvm only(Ref(4)) ; Function Signature: only(Base.RefValue{Int64}) ; @ iterators.jl:1550 within `only` define i64 @julia_only_6821({}* noundef nonnull align 8 dereferenceable(8) %"x::RefValue") #0 { top: ; @ iterators.jl:1551 within `only` ; ┌ @ refpointer.jl:103 within `iterate` ; │┌ @ refvalue.jl:59 within `getindex` ; ││┌ @ Base.jl:49 within `getproperty` %0 = bitcast {}* %"x::RefValue" to i64* %.x = load i64, i64* %0, align 8 ; └└└ ; @ iterators.jl:1559 within `only` ret i64 %.x } julia> @code_llvm only(Ref(nothing)) ; Function Signature: only(Base.RefValue{Nothing}) ; @ iterators.jl:1550 within `only` define void @julia_only_6824({}* noundef nonnull %"x::RefValue") #0 { top: ; @ iterators.jl:1559 within `only` ret void } julia> @code_llvm only('z') ; Function Signature: only(Char) ; @ iterators.jl:1550 within `only` define i32 @julia_only_6826(i32 zeroext %"x::Char") #0 { top: ; @ iterators.jl:1559 within `only` ret i32 %"x::Char" } julia> @code_llvm only((4,)) ; Function Signature: only(Tuple{Int64}) ; @ /Users/x/.julia/dev/julia/base/iterators.jl:1566 within `only` define i64 @julia_only_6833([1 x i64]* nocapture noundef nonnull readonly align 8 dereferenceable(8) %"x::Tuple") #0 { top: ; ┌ @ tuple.jl:31 within `getindex` %"x::Tuple[1]_ptr" = getelementptr inbounds [1 x i64], [1 x i64]* %"x::Tuple", i64 0, i64 0 ; └ %"x::Tuple[1]_ptr.unbox" = load i64, i64* %"x::Tuple[1]_ptr", align 8 ret i64 %"x::Tuple[1]_ptr.unbox" } julia> @code_llvm only((nothing,)) ; Function Signature: only(Tuple{Nothing}) ; @ /Users/x/.julia/dev/julia/base/iterators.jl:1566 within `only` define void @julia_only_6836() #0 { top: ret void } julia> only((4,2)) ERROR: ArgumentError: Tuple contains 2 elements, must contain exactly 1 element Stacktrace: [1] only(x::Tuple{Int64, Int64}) @ Base.Iterators ~/.julia/dev/julia/base/iterators.jl:1564 [2] top-level scope @ REPL[31]:1 julia> @code_llvm only(Array{Int, 0}(undef)) ; Function Signature: only(Array{Int64, 0}) ; @ iterators.jl:1550 within `only` define i64 @julia_only_6848({}* noundef nonnull align 8 dereferenceable(16) %"x::Array") #0 { L60: ; @ iterators.jl:1551 within `only` ; ┌ @ array.jl:884 within `iterate` @ array.jl:884 ; │┌ @ essentials.jl:817 within `getindex` %0 = bitcast {}* %"x::Array" to i64** %1 = load i64*, i64** %0, align 8 %2 = load i64, i64* %1, align 8 ; └└ ; @ iterators.jl:1559 within `only` ret i64 %2 } julia> @code_llvm only((;x=3)) ; Function Signature: only(NamedTuple{(:x,), Tuple{Int64}}) ; @ /Users/x/.julia/dev/julia/base/iterators.jl:1571 within `only` define i64 @julia_only_6871([1 x i64]* nocapture noundef nonnull readonly align 8 dereferenceable(8) %"x::NamedTuple") #0 { top: ; ┌ @ abstractarray.jl:469 within `first` ; │┌ @ namedtuple.jl:165 within `iterate` @ namedtuple.jl:165 %"x::NamedTuple.x_ptr" = getelementptr inbounds [1 x i64], [1 x i64]* %"x::NamedTuple", i64 0, i64 0 ; └└ %"x::NamedTuple.x_ptr.unbox" = load i64, i64* %"x::NamedTuple.x_ptr", align 8 ret i64 %"x::NamedTuple.x_ptr.unbox" } julia> only((;)) ERROR: ArgumentError: NamedTuple contains 0 elements, must contain exactly 1 element Stacktrace: [1] only(x::@NamedTuple{}) @ Base.Iterators ~/.julia/dev/julia/base/iterators.jl:1568 [2] top-level scope @ REPL[34]:1 julia> only((;x=2, y=4)) ERROR: ArgumentError: NamedTuple contains 2 elements, must contain exactly 1 element Stacktrace: [1] only(x::@NamedTuple{x::Int64, y::Int64}) @ Base.Iterators ~/.julia/dev/julia/base/iterators.jl:1568 [2] top-level scope @ REPL[35]:1 ``` Diff ```diff < # Before --- > # After 4,5c4,5 < ; @ iterators.jl:1563 within `only` < define i64 @julia_only_2451({}* noundef nonnull align 8 dereferenceable(8) %"x::RefValue") #0 { --- > ; @ iterators.jl:1550 within `only` > define i64 @julia_only_6821({}* noundef nonnull align 8 dereferenceable(8) %"x::RefValue") #0 { 7,11c7,14 < ; ┌ @ refvalue.jl:59 within `getindex` < ; │┌ @ Base.jl:49 within `getproperty` < %0 = bitcast {}* %"x::RefValue" to i64* < %.x = load i64, i64* %0, align 8 < ; └└ --- > ; @ iterators.jl:1551 within `only` > ; ┌ @ refpointer.jl:103 within `iterate` > ; │┌ @ refvalue.jl:59 within `getindex` > ; ││┌ @ Base.jl:49 within `getproperty` > %0 = bitcast {}* %"x::RefValue" to i64* > %.x = load i64, i64* %0, align 8 > ; └└└ > ; @ iterators.jl:1559 within `only` 17,18c20,21 < ; @ iterators.jl:1563 within `only` < define void @julia_only_2519({}* noundef nonnull %"x::RefValue") #0 { --- > ; @ iterators.jl:1550 within `only` > define void @julia_only_6824({}* noundef nonnull %"x::RefValue") #0 { 19a23 > ; @ iterators.jl:1559 within `only` 25,26c29,30 < ; @ iterators.jl:1565 within `only` < define i32 @julia_only_2527(i32 zeroext %"x::Char") #0 { --- > ; @ iterators.jl:1550 within `only` > define i32 @julia_only_6826(i32 zeroext %"x::Char") #0 { 27a32 > ; @ iterators.jl:1559 within `only` 33,34c38,39 < ; @ iterators.jl:1566 within `only` < define i64 @julia_only_2529([1 x i64]* nocapture noundef nonnull readonly align 8 dereferenceable(8) %"x::Tuple") #0 { --- > ; @ /Users/x/.julia/dev/julia/base/iterators.jl:1566 within `only` > define i64 @julia_only_6833([1 x i64]* nocapture noundef nonnull readonly align 8 dereferenceable(8) %"x::Tuple") #0 { 45,46c50,51 < ; @ iterators.jl:1566 within `only` < define void @julia_only_2532() #0 { --- > ; @ /Users/x/.julia/dev/julia/base/iterators.jl:1566 within `only` > define void @julia_only_6836() #0 { 55c60 < @ Base.Iterators ./iterators.jl:1567 --- > @ Base.Iterators ~/.julia/dev/julia/base/iterators.jl:1564 57c62 < @ REPL[6]:1 --- > @ REPL[31]:1 61,70c66,76 < ; @ iterators.jl:1570 within `only` < define i64 @julia_only_2779({}* noundef nonnull align 8 dereferenceable(16) %"a::Array") #0 { < top: < ; ┌ @ abstractarray.jl:1314 within `getindex` < ; │┌ @ abstractarray.jl:1343 within `_getindex` < ; ││┌ @ essentials.jl:817 within `getindex` < %0 = bitcast {}* %"a::Array" to i64** < %1 = load i64*, i64** %0, align 8 < %2 = load i64, i64* %1, align 8 < ; └└└ --- > ; @ iterators.jl:1550 within `only` > define i64 @julia_only_6848({}* noundef nonnull align 8 dereferenceable(16) %"x::Array") #0 { > L60: > ; @ iterators.jl:1551 within `only` > ; ┌ @ array.jl:884 within `iterate` @ array.jl:884 > ; │┌ @ essentials.jl:817 within `getindex` > %0 = bitcast {}* %"x::Array" to i64** > %1 = load i64*, i64** %0, align 8 > %2 = load i64, i64* %1, align 8 > ; └└ > ; @ iterators.jl:1559 within `only` 76,77c82,83 < ; @ iterators.jl:1571 within `only` < define i64 @julia_only_2794([1 x i64]* nocapture noundef nonnull readonly align 8 dereferenceable(8) %"x::NamedTuple") #0 { --- > ; @ /Users/x/.julia/dev/julia/base/iterators.jl:1571 within `only` > define i64 @julia_only_6871([1 x i64]* nocapture noundef nonnull readonly align 8 dereferenceable(8) %"x::NamedTuple") #0 { 91c97 < @ Base.Iterators ./iterators.jl:1572 --- > @ Base.Iterators ~/.julia/dev/julia/base/iterators.jl:1568 93c99 < @ REPL[9]:1 --- > @ REPL[34]:1 99c105 < @ Base.Iterators ./iterators.jl:1572 --- > @ Base.Iterators ~/.julia/dev/julia/base/iterators.jl:1568 101c107 < @ REPL[10]:1 --- > @ REPL[35]:1 ``` --------- Co-authored-by: matthias314 <[email protected]> Co-authored-by: Shuhei Kadowaki <[email protected]>
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An easily merged subset of @matthias314's #52296, separated from that PR at @mkitti's suggestion.
I kept the low-but-nonzero value specializations for Tuple and Named tuple which offer better error messages. They may be removed with a future PR that improves the generic error message.
To verify this is indeed a no-op
Before
After
Diff