Feature/singlepass windows

[ptitSeb]

Description

Added Windows x86_64 support to SinglePass Compiler.

Compared to System V ABI, the Windows ABI changed the way argument are send to function in the following way:

1. Only the 4 1st arguments can be send in register.
2. The argument will go in XMM reg is Float or Double, or in GPR for anything else
3. Regs are RCX/XMM0, RDX/XMM1, R8/XMM2 and R9/XMM3
4. Other argument go to the stack
5. There is 32bytes also reserved in the stack to shadow the 4 arguments if the callee function needs too

[syrusakbary]

Right now we are using compilation flags #[cfg(target_os = "windows")] to determine the output.

To allow cross-compilation it would be great to have it depending on a runtime flag (we can add the compiler::Target to the Singlepass struct, and check the target OS there)

[ptitSeb]

bors try

[bors]

try

Build failed:

• Code lint

[ptitSeb]

bors try

[bors]

try

Build failed:

• Test on linux-x64

[ptitSeb]

bors try

[bors]

try

Build failed:

• Test on windows-x64

[ptitSeb]

bors try

[bors]

try

Build failed:

• Test on windows-x64

[ptitSeb]

bors try

[bors]

try

Build succeeded:

• Audit
• Test cross-compile on linux
• Test cross-compile on macos
• Test on linux-x64
• Code lint
• Test on windows-x64
• Test on macos-x64

[webmaster128]

Great stuff, thank you! This is big news.

CHANGELOG entry seems missing. Would love to see this released. Happy to test.