Keno Fischer Keno

## gist:0bf23c7d0c75cfdab84580039d54997e
module Branchy
    using Base: significand_mask, significand_bits, exponent_mask, sign_mask

    @inline function compute_base_shift(e)
        if e < -25  # Very small numbers map to zero
            base = 0x0000
            sh = 25
        elseif e < -14  # Small numbers map to denorms
            base = 0x0000
            sh = -e-1

## gist:5d168c39085312f6b7398555cdc07127
00:00.0 Host bridge [0600]: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Host Bridge/DRAM Registers [8086:190f] (rev 07)
	Subsystem: Super Micro Computer Inc Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Host Bridge/DRAM Registers [15d9:0884]
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ >SERR- <PERR- INTx-
	Latency: 0
	Capabilities: [e0] Vendor Specific Information: Len=10 <?>
	Kernel driver in use: skl_uncore
00: 86 80 0f 19 06 00 90 20 07 00 00 06 00 00 00 00
10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 d9 15 84 08

## gist:4751ff94f10868275b888f957aef0c64
/workspace/srcdir/julia/usr/share/julia/stdlib/v1.3/PkInternal error: encountered unexpected error in runtime:
TypeError(func=:Tuple, context="parameter", expected=Type, got=<?#0x7f27f22266b0::<circular reference @-1>>)
rec_backtrace at /workspace/srcdir/julia/src/stackwalk.c:94
record_backtrace at /workspace/srcdir/julia/src/task.c:216 [inlined]
jl_throw at /workspace/srcdir/julia/src/task.c:442
jl_type_error_rt at /workspace/srcdir/julia/src/rtutils.c:118
jl_f_apply_type at /workspace/srcdir/julia/src/builtins.c:927
jl_apply_generic at /workspace/srcdir/julia/src/gf.c:2192
jl_apply at /workspace/srcdir/julia/src/julia.h:1609 [inlined]
jl_f__apply at /workspace/srcdir/julia/src/builtins.c:626

## scev_umin_llvm80.patch
commit 18e563f695dd561c32393512fbdb8ce8771d7e5f
Author: Keno Fischer <keno@juliacomputing.com>
Date:   Thu May 2 08:35:22 2019 -0400

    [SCEV] Add explicit representations of umin/smin

    Summary:
    Currently we express umin as `~umax(~x, ~y)`. However, this becomes
    a problem for operands in non-integral pointer spaces, because `~x`
    is not something we can compute for `x` non-integral. However, since

## serialdump

DRAM Init-DDR3
CBR0-1357135670123456701234567
CBR134Done

Loading kernel: [4038209a]
Loading device tree: [35cbc4d5]
Loading initrd: [087d899b]
Starting kernel ...
Uncompressing Linux... done, booting the kernel.

## gist:b918b17e80d06760679c65b9443806db
2 1 ─ %1   = Main.randn(Main.Float32, 20)::Array{Float32,1}                                                                     │
3 │   %2   = Zygote.unwrap(%1)::Array{Float32,1}                                                                                │╻╷╷╷╷                  gradient
  │   %3   = Zygote.unwrap(_3)::Float32                                                                                         ││╻╷                     #21
  │   %4   = Zygote.unwrap(_2)::Chain{Tuple{Dense{typeof(identity),Array{Float32,2},Array{Float32,1}}}}                         │││╻╷╷╷╷╷╷                gradient
  │   %5   = Zygote.unwrap(%2)::Array{Float32,1}                                                                                ││││╻╷╷╷╷                  #22
  │   %6   = Core.tuple(%5, %3)::Tuple{Array{Float32,1},Float32}                                                                │││││╻                      _forward
  │   %7   = Zygote.compute_szs(%6, 1)::Array{Int64,1}

## gist:3bba34b85f80d37c59a9ffcb39c06439
HloModule test

comp2 {
  ROOT comp2_constant3012 = f32[] constant(0)
}

comp3 {
  ROOT comp3_constant3013 = f32[] constant(1)
}

## gist:68694aaf47b2c7e0a4561ec0a23e6f2c
HloModule test

comp1 {
  comp1_parameter3867 = f32[] parameter(0)
  comp1_parameter3868 = f32[] parameter(1)
  ROOT comp1_divide3869 = f32[] divide(comp1_parameter3867, comp1_parameter3868)
}

comp2 {
  comp2_parameter3875 = f32[] parameter(0)

## gist:4b290b1a43ae06e7a69b162a9ca9080d
HloModule test

comp1 {
  comp1_parameter3990 = f32[] parameter(0)
  comp1_parameter3991 = f32[] parameter(1)
  ROOT comp1_divide3992 = f32[] divide(comp1_parameter3990, comp1_parameter3991)
}

comp2 {
  comp2_parameter3998 = f32[] parameter(0)

## gist:e6325f1f9dc3825630019def9ce8bf01
CodeInfo(
41 1 ─ %1  = Base.sin::typeof(sin)                                                                                                                             │╻╷╷╷╷╷╷    derivative
   │   %2  = invoke %1(_2::Float64)::Float64                                                                                                                   ││┃│││││     gradient
   │   %3  = Base.cos::typeof(cos)                                                                                                                             │││╻          forward
   │   %4  = invoke %3(_2::Float64)::Float64                                                                                                                   ││││┃│││       _forward
   │   %5  = Base.exp::typeof(exp)                                                                                                                             │││││╻╷         fx_opt
   │   %6  = invoke %5(_2::Float64)::Float64