COFF ARM64 Windows Target

This README details my upstream LLVM work on enabling the arm64-windows target in LLVM.

Chromium ARM64 Windows Support

http://llvmweekly.org/issue/265

http://lists.llvm.org/pipermail/llvm-dev/2018-July/124687.html

https://bugs.chromium.org/p/chromium/issues/detail?id=893460#c21

https://bugzilla.mozilla.org/show_bug.cgi?id=1512822

Structured Exception Handling (SEH) patches:

https://reviews.llvm.org/D53540 [Implement support for SEH extensions __try/__except/__finally]

https://reviews.llvm.org/D57183 [Fix localaddress to handle stack realignment and variable size objects]

https://reviews.llvm.org/D56747 [Rename llvm.x86.seh.recoverfp intrinsic to llvm.eh.recoverfp]

https://reviews.llvm.org/D56748 [Rename llvm.x86.seh.recoverfp intrinsic to llvm.eh.recoverfp]

https://reviews.llvm.org/D53541 [Do not emit x86_seh_recoverfp intrinsic]

https://reviews.llvm.org/D50029 [Enable SEH for ARM64 Windows]

https://reviews.llvm.org/D56037 [Emit the correct MCExpr relocations specifiers like VK_ABS_G0, etc]

https://reviews.llvm.org/D56029 [Support resolving signed fixups for :abs_g0_s: etc.]

ARM64 Intrinsics patches:

https://reviews.llvm.org/D56685 [Add __byteswap intrinsics]

https://reviews.llvm.org/D56671 [Add __nop intrinsic]

https://reviews.llvm.org/D53962 [Implement llvm.addressofreturnaddress intrinsic]

https://reviews.llvm.org/rC345808 [Implement llvm.addressofreturnaddress intrinsic]

https://reviews.llvm.org/D54068 [Implement InterlockedDecrement*_* builtins]

https://reviews.llvm.org/D54067 [Implement InterlockedIncrement*_* builtins]

https://reviews.llvm.org/D54066 [Implement InterlockedAnd*_* builtins]

https://reviews.llvm.org/rC346205 [Implement InterlockedXor*_* builtins]

https://reviews.llvm.org/rC346190 [Implement InterlockedOr*_* builtins]

https://reviews.llvm.org/D54062 [Implement InterlockedCompareExchange*_* builtins]

https://reviews.llvm.org/D54046 [Implement InterlockedExchange*_* builtins]

https://reviews.llvm.org/D53115 [Add _ReadStatusReg and_WriteStatusReg intrinsics]

https://reviews.llvm.org/D52811 [Add _InterlockedAdd intrinsic]

https://reviews.llvm.org/D52807 [Add _InterlockedCompareExchangePointer_nf intrinsic]

https://reviews.llvm.org/D52838 [Add __getReg intrinsic]

https://reviews.llvm.org/D52809 [Add _ReadWriteBarrier intrinsic]

https://reviews.llvm.org/D53115 [Add _ReadStatusReg and_WriteStatusReg intrinsics]

https://reviews.llvm.org/D49445 [Add more missing MSVC ARM64 intrinsics]

https://reviews.llvm.org/D48132 [Add ARM64 intrinsics: __yield, __wfe, __wfi, __sev, __sevl]

https://reviews.llvm.org/D36110 [Add MS builtins __dmb, __dsb, __isb]

ARM64 Calling Convention and other patches:

https://reviews.llvm.org/D60348 [Fix ABI implementation of struct returns]

https://reviews.llvm.org/D60349 [Fix ABI implementation of struct returns]

https://reviews.llvm.org/D55535 [Emit COFF function header]

https://reviews.llvm.org/D54248 [Add support for MSVC buffer security check]

https://reviews.llvm.org/D35531 [Reserve X18 register by default]

https://reviews.llvm.org/D49464 [Decide when to mark struct returns as SRet]

https://reviews.llvm.org/D34859 [Set the data type widths and the data layout string]

https://reviews.llvm.org/D34706 [Add support for Windows ARM64 COFF format]

https://reviews.llvm.org/D34857 [Add initial relocation types]

https://reviews.llvm.org/D34705 [Add support for Windows ARM64 COFF format]

https://reviews.llvm.org/D34659 [Fix typo in COFF ARM64 Relocation Type]

https://reviews.llvm.org/D35518 [Add support to emit CodeView debug info for ARM64 COFF]