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November 20, 2014 06:03
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julia> function testgetindex(v) | |
@inbounds x = v[1] | |
x | |
end | |
testgetindex (generic function with 1 method) | |
julia> @code_llvm testgetindex(v) | |
define double @"julia_testgetindex;42178"(%jl_value_t*) { | |
top: | |
%1 = getelementptr inbounds %jl_value_t* %0, i64 1, !dbg !1972 | |
%2 = bitcast %jl_value_t* %1 to i8**, !dbg !1972 | |
%3 = load i8** %2, align 8, !dbg !1972, !tbaa %jtbaa_arrayptr | |
%4 = bitcast i8* %3 to double*, !dbg !1972 | |
%5 = load double* %4, align 8, !dbg !1972, !tbaa %jtbaa_user | |
ret double %5, !dbg !1979 | |
} | |
julia> @code_llvm testgetindex(vn) | |
define %Nullable @"julia_testgetindex;42179"(%jl_value_t*) { | |
top: | |
%1 = getelementptr inbounds %jl_value_t* %0, i64 1, !dbg !1975 | |
%2 = bitcast %jl_value_t* %1 to i8**, !dbg !1975 | |
%3 = load i8** %2, align 8, !dbg !1975, !tbaa %jtbaa_arrayptr | |
%4 = bitcast i8* %3 to %Nullable*, !dbg !1975 | |
%5 = load %Nullable* %4, align 8, !dbg !1975, !tbaa %jtbaa_user, !julia_type !1982 | |
ret %Nullable %5, !dbg !1983 | |
} | |
julia> @code_llvm testgetindex(nv) | |
define %Nullable @"julia_testgetindex;42180"(%jl_value_t*) { | |
top: | |
%1 = getelementptr inbounds %jl_value_t* %0, i64 1, i32 0, !dbg !1978 | |
%2 = load %jl_value_t** %1, align 8, !dbg !1978, !tbaa %jtbaa_immut | |
%3 = call i1 @julia_getindex2385(%jl_value_t* %2, i64 1), !dbg !1978 | |
br i1 %3, label %L1, label %L, !dbg !1978 | |
L: ; preds = %top | |
%4 = getelementptr inbounds %jl_value_t* %0, i64 2, i32 0, !dbg !1978 | |
%5 = load %jl_value_t** %4, align 8, !dbg !1978, !tbaa %jtbaa_immut | |
%6 = getelementptr inbounds %jl_value_t* %5, i64 1, !dbg !1978 | |
%7 = bitcast %jl_value_t* %6 to i8**, !dbg !1978 | |
%8 = load i8** %7, align 8, !dbg !1978, !tbaa %jtbaa_arrayptr | |
%9 = bitcast i8* %8 to double*, !dbg !1978 | |
%10 = load double* %9, align 8, !dbg !1978, !tbaa %jtbaa_user | |
%11 = insertvalue %Nullable { i8 0, double undef }, double %10, 1, !dbg !1978, !julia_type !1986 | |
br label %L1, !dbg !1978 | |
L1: ; preds = %top, %L | |
%_var0.0 = phi %Nullable [ %11, %L ], [ { i8 1, double undef }, %top ] | |
ret %Nullable %_var0.0, !dbg !1987 | |
} |
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