Implement and test simd_shuffle*

[WIP] simd_shuffle*

[WIP] simd_shuffle support

Replace llvm intrinsics with runtime trap

Fix simd comparison

Emulate compare simd intrinsics

Emulate some simd intrinsics

Rustup to rustc 1.38.0-nightly (4560cb830 2019-07-28)

Update dependencies

Rustup to rustc 1.38.0-nightly (c798dffac 2019-07-27)

Implement many more float intrinsics

Don't set opt_level to best

LICM is still broken

Fix checked binops when overflow checks are disabled

Rustup to rustc 1.38.0-nightly (c43753f91 2019-07-26)

Reduce patching of libcore a bit

These parts are no longer necessary as of #627

Merge pull request #627 from bjorn3/wip_i128

Support 128bit numbers

Use own branch of clif instead of local checkout

Update Readme.md

Remove unnecessary changes

Merge pull request #646 from bjorn3/wip_checked_binops2

Implement checked add and sub

[WIP]

Use std checked_div

Display span in Assert panic message

Fix arg header comments

Remove some unnecessary changes

Fix 128bit CValue::const_val

Implement 128bit checked add and sub

Implement 128bit comparison binops

Implement 128bit multiply with overflow

Implement 128bit shl and shr binops

Respect sess.overflow_checks()

[WIP]

Implement most 128bit binops

Remove unnecessary if statement

Don't special case u/i128 for UnOp::not

Fix it

Fix some more stuff

[WIP]

[WIP]

Fix type in load_scalar

Fix some things

[WIP] Basic i128 support

Implement checked binops

Rustup to rustc 1.38.0-nightly (a7f28678b 2019-07-23)

Update Cargo.lock

Update cranelift

Don't disable stdsimd anymore

This doesn't enable simd support. Actually using the functions will
result in a compilation error.

Rustup to rustc 1.38.0-nightly (e3cebcb3b 2019-07-19)

Update Cargo.lock

Update cranelift

Rustup to rustc 1.38.0-nightly (71f9384e3 2019-07-12)

Bump cranelift-module from `1ba2b65` to `4125d47` (#636)

Bumps [cranelift-module](https://github.com/CraneStation/cranelift) from `1ba2b65` to `4125d47`.
- [Release notes](https://github.com/CraneStation/cranelift/releases)
- [Commits](https://github.com/CraneStation/cranelift/compare/1ba2b6536c1d2f9834825bda0c64e084b0f03d47...4125d47d692813a1ddfc66dd2ef87243df86f697)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #630 from bjorn3/dependabot/cargo/cranelift-1ba2b65

Bump cranelift from `00ac8be` to `1ba2b65`

Rustup

Bump cranelift from `00ac8be` to `1ba2b65`

Bumps [cranelift](https://github.com/CraneStation/cranelift) from `00ac8be` to `1ba2b65`.
- [Release notes](https://github.com/CraneStation/cranelift/releases)
- [Commits](https://github.com/CraneStation/cranelift/compare/00ac8be2fecbef3bb59d845a83123126e8317113...1ba2b6536c1d2f9834825bda0c64e084b0f03d47)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Rustup to rustc 1.38.0-nightly (dfd52ba6a 2019-07-06)

Update Cargo.lock

Merge pull request #624 from bjorn3/dependabot/cargo/cranelift-faerie-312516a

Bump cranelift-faerie from `3317fc6` to `312516a`

Bumps [cranelift-faerie](https://github.com/CraneStation/cranelift) from `3317fc6` to `312516a`.
- [Release notes](https://github.com/CraneStation/cranelift/releases)
- [Commits](https://github.com/CraneStation/cranelift/compare/3317fc623c315073710fc1ed67c2d17d2466ab5d...312516a69da03dc06eace32f61412389a8dcadf3)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Rustup to rustc 1.37.0-nightly (0beb2ba16 2019-07-02)

Also removes some unnecessary errors.

[CI] Only cache .cargo dir

Rustup to rustc 1.37.0-nightly (433a46781 2019-06-28)

Implement some float intrinsics

Update Cargo.lock

Merge pull request #617 from bjorn3/dependabot/cargo/cranelift-1eb92b1

Bump cranelift from `f3f7cad` to `1eb92b1`

Bumps [cranelift](https://github.com/CraneStation/cranelift) from `f3f7cad` to `1eb92b1`.
- [Release notes](https://github.com/CraneStation/cranelift/releases)
- [Commits](https://github.com/CraneStation/cranelift/compare/f3f7cadd0157d06089c9b5864d513a61856d0f4d...1eb92b193dcd8f137005d0dcfde972ac25a20221)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Implement bswap intrinsic

Implement some intrinsics

Fix load and store for ByValPair values with differently sized components

Remove some unnecessary patches

cc #337

Rustup to rustc 1.37.0-nightly (de02101e6 2019-06-22)

Fix returning non ZST uninhabited types

Fix SetDiscriminant for generators

Implement lt, le, ge and gt for fat pointers

Add comments for trap::codegen_print gv and fn defs

Make a link less prone to breaking

Refactor drop codegen

Fix compiling in release mode

Update dependencies

Implement scalar pair abi pass mode

Fix `write_cvalue` for `ByValPair` when the cvalue is not trivially a pair

`write_cvalue` didn't work for `Box<[u8]>`, because the inner fat ptr
was wrapped inside a newtype, which meant `Box<[u8]>` itself only had
one field.

This also simplifies `CValue::force_stack` by reusing `write_cvalue`
when it is not already on the stack.

Rustup to rustc 1.37.0-nightly (0dc9e9c10 2019-06-15)

Apply rust-lang pr61828 to fix sysroot building

Rustup to rustc 1.37.0-nightly (2887008e0 2019-06-12)

Fix debuginfo generation when given source path doesn't contain a dir (eg plain lib.rs)

Bump region from 2.1.0 to 2.1.1 (#606)

Bumps [region](https://github.com/darfink/region-rs) from 2.1.0 to 2.1.1.
- [Release notes](https://github.com/darfink/region-rs/releases)
- [Commits](https://github.com/darfink/region-rs/compare/2.1.0...2.1.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bump miniz-sys from 0.1.11 to 0.1.12 (#607)

Bumps [miniz-sys](https://github.com/alexcrichton/flate2-rs) from 0.1.11 to 0.1.12.
- [Release notes](https://github.com/alexcrichton/flate2-rs/releases)
- [Commits](https://github.com/alexcrichton/flate2-rs/compare/miniz-sys-0.1.11...miniz-sys-0.1.12)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Remove workaround for previously missing encoding

Merge pull request #435 from bjorn3/write_dylib_metadata

Read and write dylib metadata

Cleanup

Fix it

[WIP]

Update for faerie section symbols

[WIP] Add section symbol for mach-O

Only write metadata module when necessary

[WIP]

[DEBUG] Add objdump invocation

[WIP] Use correct segment for metadata section

Read and write dylib metadata

Move layout out of the enum for CValue