Handle masked reverse mode atomic append

The following minimal function results in a segfault (run on Enzyme's main as of 2023-11-26, Julia v1.10.0-rc1). If removing the `@turbo` annotation, the autodiff works fine.

```julia
using LoopVectorization
using Enzyme

function my_conv_B(x, w)
y = zero(x)
@turbo for hi in axes(x, 2)
for k in axes(x, 1)
y[k] += w[k] * x[k, hi]
end
end
return y
end
x = rand(Float32, 3, 5);
w = rand(Float32, 3);
y = my_conv_B(x, w);
loss_B(x, w) = sum(my_conv_B(x, w))
dw = zero(w);
loss_B(x, w)
grads = Enzyme.autodiff(Reverse, loss_B, Const(x), Duplicated(w, dw));
```

Below is the launch command along the resulting error info.
One thing I noticed is the reference to `/opt/x86_64-linux-gnu/x86_64-linux-gnu/sys-root/usr/local/include/llvm/Support/Casting.h:578`. Is it expected to point to LLVM under what appears like a general system path raher than a Julia specific one? I'm on Ubuntu 23.10 and Julia was installed in a generic way (untar the official binaries under home directory and creation of sym link).

```bash
jeremiedb@client-X570S-AORUS-PRO-AX:~/github/ADTests.jl$ julia --project=@. --threads=4 experiments/conv-v3-lv.jl
julia: /opt/x86_64-linux-gnu/x86_64-linux-gnu/sys-root/usr/local/include/llvm/Support/Casting.h:578: decltype(auto) llvm::cast(From*) [with To = llvm::IntegerType; From = llvm::Type]: Assertion `isa(Val) && "cast() argument of incompatible type!"' failed.

[13573] signal (6.-6): Aborted
in expression starting at /home/jeremiedb/github/ADTests.jl/experiments/conv-v3-lv.jl:44
pthread_kill at /lib/x86_64-linux-gnu/libc.so.6 (unknown line)
raise at /lib/x86_64-linux-gnu/libc.so.6 (unknown line)
abort at /lib/x86_64-linux-gnu/libc.so.6 (unknown line)
unknown function (ip: 0x7fac7ce267da)
__assert_fail at /lib/x86_64-linux-gnu/libc.so.6 (unknown line)
cast at /opt/x86_64-linux-gnu/x86_64-linux-gnu/sys-root/usr/local/include/llvm/Support/Casting.h:578 [inlined]
computeExitLimitFromICmp at /workspace/srcdir/Enzyme/enzyme/Enzyme/MustExitScalarEvolution.cpp:432
computeExitLimitFromCondImpl at /workspace/srcdir/Enzyme/enzyme/Enzyme/MustExitScalarEvolution.cpp:304
computeExitLimitFromCondCached at /workspace/srcdir/Enzyme/enzyme/Enzyme/MustExitScalarEvolution.cpp:159
computeExitLimitFromCond at /workspace/srcdir/Enzyme/enzyme/Enzyme/MustExitScalarEvolution.cpp:52
computeExitLimit at /workspace/srcdir/Enzyme/enzyme/Enzyme/MustExitScalarEvolution.cpp:102
getContext at /workspace/srcdir/Enzyme/enzyme/Enzyme/CacheUtility.cpp:555
forceAugmentedReturns at /workspace/srcdir/Enzyme/enzyme/Enzyme/GradientUtils.cpp:8198
CreateAugmentedPrimal at /workspace/srcdir/Enzyme/enzyme/Enzyme/EnzymeLogic.cpp:2350
recursivelyHandleSubfunction at /workspace/srcdir/Enzyme/enzyme/Enzyme/AdjointGenerator.h:5176
visitCallInst at /workspace/srcdir/Enzyme/enzyme/Enzyme/AdjointGenerator.h:6183
delegateCallInst at /opt/x86_64-linux-gnu/x86_64-linux-gnu/sys-root/usr/local/include/llvm/IR/InstVisitor.h:301 [inlined]
visitCall at /opt/x86_64-linux-gnu/x86_64-linux-gnu/sys-root/usr/local/include/llvm/IR/Instruction.def:209 [inlined]
visit at /opt/x86_64-linux-gnu/x86_64-linux-gnu/sys-root/usr/local/include/llvm/IR/Instruction.def:209
visit at /opt/x86_64-linux-gnu/x86_64-linux-gnu/sys-root/usr/local/include/llvm/IR/InstVisitor.h:111 [inlined]
CreatePrimalAndGradient at /workspace/srcdir/Enzyme/enzyme/Enzyme/EnzymeLogic.cpp:4238
EnzymeCreatePrimalAndGradient at /workspace/srcdir/Enzyme/enzyme/Enzyme/CApi.cpp:582
EnzymeCreatePrimalAndGradient at /home/jeremiedb/.julia/packages/Enzyme/fli3h/src/api.jl:141
unknown function (ip: 0x7fabed3931db)
_jl_invoke at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/gf.c:2892 [inlined]
ijl_apply_generic at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/gf.c:3074
enzyme! at /home/jeremiedb/.julia/packages/Enzyme/fli3h/src/compiler.jl:3025
unknown function (ip: 0x7fabed38de79)
_jl_invoke at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/gf.c:2892 [inlined]
ijl_apply_generic at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/gf.c:3074
#codegen#447 at /home/jeremiedb/.julia/packages/Enzyme/fli3h/src/compiler.jl:4649
codegen at /home/jeremiedb/.julia/packages/Enzyme/fli3h/src/compiler.jl:4232 [inlined]
_thunk at /home/jeremiedb/.julia/packages/Enzyme/fli3h/src/compiler.jl:5201
_thunk at /home/jeremiedb/.julia/packages/Enzyme/fli3h/src/compiler.jl:5201 [inlined]
cached_compilation at /home/jeremiedb/.julia/packages/Enzyme/fli3h/src/compiler.jl:5235 [inlined]
EnzymeAD/Enzyme.jl#484 at /home/jeremiedb/.julia/packages/Enzyme/fli3h/src/compiler.jl:5301
JuliaContext at /home/jeremiedb/.julia/packages/GPUCompiler/U36Ed/src/driver.jl:47
unknown function (ip: 0x7fabed33c7b5)
_jl_invoke at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/gf.c:2892 [inlined]
ijl_apply_generic at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/gf.c:3074
#s1040#483 at /home/jeremiedb/.julia/packages/Enzyme/fli3h/src/compiler.jl:5253 [inlined]
#s1040#483 at ./none:0
_jl_invoke at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/gf.c:2892 [inlined]
ijl_apply_generic at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/gf.c:3074
GeneratedFunctionStub at ./boot.jl:600
_jl_invoke at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/gf.c:2892 [inlined]
ijl_apply_generic at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/gf.c:3074
jl_call_staged at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/method.c:540
ijl_code_for_staged at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/method.c:593
get_staged at ./compiler/utilities.jl:123
retrieve_code_info at ./compiler/utilities.jl:135 [inlined]
InferenceState at ./compiler/inferencestate.jl:430
typeinf_edge at ./compiler/typeinfer.jl:920
abstract_call_method at ./compiler/abstractinterpretation.jl:629
abstract_call_gf_by_type at ./compiler/abstractinterpretation.jl:95
abstract_call_known at ./compiler/abstractinterpretation.jl:2083
abstract_call at ./compiler/abstractinterpretation.jl:2165
abstract_call at ./compiler/abstractinterpretation.jl:2158
abstract_call at ./compiler/abstractinterpretation.jl:2348
abstract_eval_call at ./compiler/abstractinterpretation.jl:2364
abstract_eval_statement_expr at ./compiler/abstractinterpretation.jl:2374
abstract_eval_statement at ./compiler/abstractinterpretation.jl:2618
abstract_eval_basic_statement at ./compiler/abstractinterpretation.jl:2883
typeinf_local at ./compiler/abstractinterpretation.jl:3092
typeinf_nocycle at ./compiler/abstractinterpretation.jl:3180
_typeinf at ./compiler/typeinfer.jl:247
typeinf at ./compiler/typeinfer.jl:216
typeinf_edge at ./compiler/typeinfer.jl:930
abstract_call_method at ./compiler/abstractinterpretation.jl:629
abstract_call_gf_by_type at ./compiler/abstractinterpretation.jl:95
abstract_call_known at ./compiler/abstractinterpretation.jl:2083
abstract_call at ./compiler/abstractinterpretation.jl:2165
abstract_apply at ./compiler/abstractinterpretation.jl:1608
abstract_call_known at ./compiler/abstractinterpretation.jl:2000
abstract_call at ./compiler/abstractinterpretation.jl:2165
abstract_call at ./compiler/abstractinterpretation.jl:2158
abstract_call at ./compiler/abstractinterpretation.jl:2348
abstract_eval_call at ./compiler/abstractinterpretation.jl:2364
abstract_eval_statement_expr at ./compiler/abstractinterpretation.jl:2374
abstract_eval_statement at ./compiler/abstractinterpretation.jl:2618
abstract_eval_basic_statement at ./compiler/abstractinterpretation.jl:2907
typeinf_local at ./compiler/abstractinterpretation.jl:3092
typeinf_nocycle at ./compiler/abstractinterpretation.jl:3180
_typeinf at ./compiler/typeinfer.jl:247
typeinf at ./compiler/typeinfer.jl:216
typeinf_edge at ./compiler/typeinfer.jl:930
abstract_call_method at ./compiler/abstractinterpretation.jl:629
abstract_call_gf_by_type at ./compiler/abstractinterpretation.jl:95
abstract_call_known at ./compiler/abstractinterpretation.jl:2083
abstract_call at ./compiler/abstractinterpretation.jl:2165
abstract_apply at ./compiler/abstractinterpretation.jl:1608
abstract_call_known at ./compiler/abstractinterpretation.jl:2000
abstract_call at ./compiler/abstractinterpretation.jl:2165
abstract_call at ./compiler/abstractinterpretation.jl:2158
abstract_call at ./compiler/abstractinterpretation.jl:2348
abstract_eval_call at ./compiler/abstractinterpretation.jl:2364
abstract_eval_statement_expr at ./compiler/abstractinterpretation.jl:2374
abstract_eval_statement at ./compiler/abstractinterpretation.jl:2618
abstract_eval_basic_statement at ./compiler/abstractinterpretation.jl:2907
typeinf_local at ./compiler/abstractinterpretation.jl:3092
typeinf_nocycle at ./compiler/abstractinterpretation.jl:3180
_typeinf at ./compiler/typeinfer.jl:247
typeinf at ./compiler/typeinfer.jl:216
typeinf_ext at ./compiler/typeinfer.jl:1051
typeinf_ext_toplevel at ./compiler/typeinfer.jl:1082
typeinf_ext_toplevel at ./compiler/typeinfer.jl:1078
jfptr_typeinf_ext_toplevel_35717.1 at /home/jeremiedb/Downloads/julia-1.10.0-rc1/lib/julia/sys.so (unknown line)
_jl_invoke at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/gf.c:2892 [inlined]
ijl_apply_generic at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/gf.c:3074
jl_apply at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/julia.h:1976 [inlined]
jl_type_infer at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/gf.c:394
jl_generate_fptr_impl at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/jitlayers.cpp:502
jl_compile_method_internal at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/gf.c:2478 [inlined]
jl_compile_method_internal at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/gf.c:2366
_jl_invoke at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/gf.c:2884 [inlined]
ijl_apply_generic at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/gf.c:3074
jl_apply at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/julia.h:1976 [inlined]
do_call at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/interpreter.c:125
eval_value at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/interpreter.c:222
eval_stmt_value at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/interpreter.c:173 [inlined]
eval_body at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/interpreter.c:616
jl_interpret_toplevel_thunk at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/interpreter.c:774
jl_toplevel_eval_flex at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/toplevel.c:934
jl_toplevel_eval_flex at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/toplevel.c:877
jl_toplevel_eval_flex at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/toplevel.c:877
ijl_toplevel_eval_in at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/toplevel.c:985
eval at ./boot.jl:383 [inlined]
include_string at ./loading.jl:2070
_jl_invoke at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/gf.c:2892 [inlined]
ijl_apply_generic at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/gf.c:3074
_include at ./loading.jl:2130
include at ./Base.jl:489
jfptr_include_46395.1 at /home/jeremiedb/Downloads/julia-1.10.0-rc1/lib/julia/sys.so (unknown line)
_jl_invoke at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/gf.c:2892 [inlined]
ijl_apply_generic at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/gf.c:3074
exec_options at ./client.jl:318
_start at ./client.jl:552
jfptr__start_82758.1 at /home/jeremiedb/Downloads/julia-1.10.0-rc1/lib/julia/sys.so (unknown line)
_jl_invoke at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/gf.c:2892 [inlined]
ijl_apply_generic at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/gf.c:3074
jl_apply at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/julia.h:1976 [inlined]
true_main at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/jlapi.c:582
jl_repl_entrypoint at /cache/build/builder-amdci4-5/julialang/julia-release-1-dot-10/src/jlapi.c:731
main at julia (unknown line)
unknown function (ip: 0x7fac7ce280cf)
__libc_start_main at /lib/x86_64-linux-gnu/libc.so.6 (unknown line)
unknown function (ip: 0x4010b8)
Allocations: 29085878 (Pool: 29035582; Big: 50296); GC: 38
Aborted (core dumped)
```