Arch D. Robison ArchRobison
ArchRobison
/ input.jl
Created
May 26, 2015 22:13
Example input and output from Julia using LLVM 3.6.1 and JULIA_LLVM_ARGS=-debug-only=loop-vectorize
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| function mysum!{T}(F, A::AbstractArray{T}) | |
| for j = 1:size(A,2) | |
| @simd for i = 1:size(A,1) | |
| @inbounds F[i,j] += A[i,j] | |
| end | |
| end | |
| return F | |
| end |
ArchRobison
/ gist:9310cb019b4974219bf7
Created
April 13, 2015 14:47
Build of adr/threading branch using kf/tlsrebase5 version of LLVM
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| make[1]: Leaving directory `/localdisk/adrobiso/tmp/julia/ui' | |
| make[1]: Entering directory `/localdisk/adrobiso/tmp/julia/base' | |
| clang -m64 -E -dM ../usr/include/pcre.h | perl -nle '/^\s*#define\s+PCRE_(\w*)\s*\(?(0x[0-9a-fA-F]+|[-+]?\s*[0-9]+)\)?\s*$/ and print "const $1 = Int32($2)"' | sort > pcre_h.jl | |
| echo '#include "errno.h"' | clang -m64 -E -dM - | perl -nle 'print "const $1 = Int32($2)" if /^#define\s+(E\w+)\s+(\d+)\s*$/' | sort > errno_h.jl | |
| clang -m64 -E -P -DJULIA ../src/file_constants.h | perl -nle 'print "$1 0o$2" if /^(\s*const\s+[A-z_]+\s+=)\s+(0[0-9]*)\s*$/; print "$1" if /^\s*(const\s+[A-z_]+\s+=\s+([1-9]|0x)[0-9A-z]*)\s*$/' > file_constants.jl | |
| clang -m64 -E -P "-I../deps/libuv/include" -DJULIA ../src/uv_constants.h | tail -n 16 > uv_constants.jl | |
| make[1]: Leaving directory `/localdisk/adrobiso/tmp/julia/base' |
ArchRobison
/ gist:e695fcb9d6361914b1e7
Created
April 9, 2015 16:30
Sample failure of build of adr/threading branch of Julia
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| $ make | |
| JULIA usr/lib/julia/sys0.o | |
| exports.jl | |
| base.jl | |
| reflection.jl | |
| build_h.jl | |
| version_git.jl | |
| c.jl | |
| options.jl | |
| promotion.jl |
ArchRobison
/ gist:a95464f10794c5711c17
Created
February 23, 2015 21:51
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| *** IR Dump After Combine redundant instructions *** | |
| ; Function Attrs: sspreq | |
| define %jl_value_t* @julia_unoptimized_42298(%jl_value_t*, %jl_value_t**, i32) #0 { | |
| top: | |
| %3 = load %jl_value_t** %1, align 8, !dbg !15 | |
| %4 = getelementptr %jl_value_t** %1, i64 1, !dbg !15 | |
| %5 = load %jl_value_t** %4, align 8, !dbg !15 | |
| %6 = getelementptr inbounds %jl_value_t* %5, i64 4, i32 0, !dbg !16 | |
| %7 = load %jl_value_t** %6, align 8, !dbg !16, !tbaa %jtbaa_arraysize | |
| %8 = ptrtoint %jl_value_t* %7 to i64, !dbg !16 |
ArchRobison
/ Transcript
Created
February 12, 2015 15:38
Slight variation of Miles Lubin's https://gist.github.com/mlubin/4994c65c7a2fa90a3c7e
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| $ clang -v | |
| clang version 3.7.0 (trunk 227196) | |
| Target: x86_64-unknown-linux-gnu | |
| Thread model: posix | |
| Found candidate GCC installation: /usr/lib/gcc/i686-redhat-linux/4.8.2 | |
| Found candidate GCC installation: /usr/lib/gcc/x86_64-redhat-linux/4.8.2 | |
| Selected GCC installation: /usr/lib/gcc/x86_64-redhat-linux/4.8.2 | |
| Candidate multilib: .;@m64 | |
| Candidate multilib: 32;@m32 | |
| Selected multilib: .;@m64 |
ArchRobison
/ gist:cb1aab380905fdc1255f
Created
January 27, 2015 18:44
Attempts to vectorize with two of the variants in https://gist.github.com/simonbyrne/62f25608aaf831de5996 .
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| $ cat truncloop.jl | |
| # use floating point AND instructions (andps/andpd) | |
| # https://github.com/JuliaLang/julia/issues/9868 | |
| function and_float(x::Float64,y::Float64) | |
| Base.llvmcall("""%av = insertelement<2 x double> undef, double %0, i32 0 | |
| %bv = insertelement<2 x double> undef, double %1, i32 0 | |
| %ai = bitcast <2 x double> %av to <2 x i64> | |
| %bi = bitcast <2 x double> %bv to <2 x i64> | |
| %and.i = and <2 x i64> %ai, %bi | |
| %cf = bitcast <2 x i64> %and.i to <2 x double> |
ArchRobison
/ gist:a340bc43c8fabb02e739
Created
January 20, 2015 22:30
LLVM not doing loop-local scalar replacment
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| julia> ind4=CartesianIndex((1,1,1,1)) | |
| Base.IteratorsMD.CartesianIndex_4(1,1,1,1) | |
| julia> @code_llvm(mymul(ind4,N,1)) | |
| define %CartesianIndex_4 @julia_mymul_43376(%CartesianIndex_4, i64, i64) { | |
| top: | |
| %3 = icmp slt i64 %1, 2, !dbg !8 | |
| br i1 %3, label %L3, label %L.preheader, !dbg !8 |
ArchRobison
/ gist:1442861e2e062ff10309
Created
January 19, 2015 15:19
Demo of vectorizing sqrt using LLVM 3.5.0
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| julia> function f(x,y,z) | |
| @fastmath @inbounds @simd for i=1:length(z) | |
| z[i] = sqrt(x[i]^2+y[i]^2) | |
| end | |
| end | |
| f (generic function with 1 method) | |
| julia> code_native(f,(Vector{Float32},Vector{Float32},Vector{Float32})) | |
| .text | |
| Filename: none |
ArchRobison
/ gist:cb9a8c654287445bd7ae
Last active
August 29, 2015 14:10
Results from https://github.com/JuliaLang/julia/pull/6271 on 2014-Nov-25 17:13 CST.
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| $ cat toivoh.jl | |
| module TestSLP | |
| function rmw!{T}(dest::Ptr{T}, src::Ptr{T}) | |
| s1 = unsafe_load(src, 1) | |
| s2 = unsafe_load(src, 2) | |
| d1 = unsafe_load(dest, 1) | |
| d2 = unsafe_load(dest, 2) | |
| d1 $= s1 | |
| d2 $= s2 |
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| $ for f in *.jl; do echo $f; mpiexec -np 4 julia $f; done | |
| 01-hello.jl | |
| Hello world, I am 1 of 4Hello world, I am 3 of 4Hello world, I am 2 of 4Hello world, I am 0 of 4 | |
| 02-broadcast.jl | |
| ------------------------------------------------------------------------------ | |
| Running on 4 processes | |
| ------------------------------------------------------------------------------ |