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d726c2a2d3
Comment out non-x86_64 architectures for now in codegen.zig, because they all have compile errors for their codepaths anyway, and it was bloating the compilation speed and memory usage when stage1 tried to build self-hosted. Here's the panic message: "Backend architectures that don't have good support yet are commented out, to improve compilation performance. If you are interested in one of these other backends feel free to uncomment them. Eventually these will be completed, but stage1 is slow and a memory hog." This is a workaround to lower the time it takes to build self-hosted with stage1 as well as use less memory. It should fix the CI. Additionally: * Add `single_mut_pointer` support to `Type` * Trivial implementation of stack allocation in codegen.zig. It does not deal with freeing yet, and it's missing the stack pointer adjustment prologue. * Add the `alloc` IR instruction and semantic analysis for `alloc` ZIR instruction.