Tracking Issue: LLVM 22

[alexrp]

• Consider switching *-uefi-* targets to uefi instead of windows for LLVM 21+ #21630
• RISC-V Extension Changes coming to LLVM 22 #25013
• Send a patch to LLVM adding n32 and x32 triple environments #25649
• Potentially send a patch to LLVM adding a call0 triple environment for Xtensa #25650
• [PowerPC] Change half to use soft promotion rather than PromoteFloat llvm/llvm-project#152632
• [AVR] Change half to use softPromoteHalfType llvm/llvm-project#152783
• [SPARC] Change half to use soft promotion rather than PromoteFloat llvm/llvm-project#152727
• [WebAssembly] Change half to use soft promotion rather than PromoteFloat llvm/llvm-project#152833
• [llvm-objcopy][libObject] Add RISC-V big-endian support llvm/llvm-project#146913
• Default stack alignment of X86 Hurd to 16 bytes llvm/llvm-project#158454
• [ELF][LLDB] Add an nvsass triple llvm/llvm-project#159459
• [Driver][Hurd] Add AArch64 and RISCV64 support llvm/llvm-project#157212
• [Driver] Enable __float128 support on X86 on Hurd llvm/llvm-project#160045
• [AArch64] Improve host feature detection. llvm/llvm-project#160410
• [RISCV] Add basic Mach-O triple support. llvm/llvm-project#141682
• [WebAssembly] Support for new target wasm32-linux-muslwali llvm/llvm-project#162581
• AMDGPU: Use ELF mangling in data layout llvm/llvm-project#163011
• [PowerPC] Take ABI into account for data layout llvm/llvm-project#149725
• Rename wasm32-wasi to wasm32-wasip1. llvm/llvm-project#165345
• [clang][RISCV] Add big-endian RISC-V target support llvm/llvm-project#165599

• zig/lib/std/zig/system.zig

  Lines 441 to 444 in feb05a7

  	// https://github.com/llvm/llvm-project/issues/135283
  	if (result.cpu.arch.isMIPS() and result.abi.float() == .soft) {
  	result.cpu.features.addFeature(@intFromEnum(Target.mips.Feature.soft_float));
  	}

• zig/test/llvm_targets.zig

  Lines 355 to 356 in bb79c85

  	// .{ .cpu_arch = .xtensa, .os_tag = .freestanding, .abi = .none },
  	// .{ .cpu_arch = .xtensa, .os_tag = .linux, .abi = .none },

• beb25b0 & 35d2b1e
• f90548e & e7f1624

Previous upgrade: #23176