d24684ef4f
Fixes for LLVM 21 This fixes compatibility issues with LLVM 21 without performing the actual upgrade. Split out from https://github.com/rust-lang/rust/pull/143684. This fixes three issues: * Updates the AMDGPU data layout for address space 8. * Makes emit-arity-indicator.rs a no_core test, so it doesn't fail on non-x86 hosts. * Explicitly sets the exception model for wasm, as this is no longer implied by `-wasm-enable-eh`.
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