Handle move of cpu_model.c

[tmandry]

This happened in https://github.com/llvm/llvm-project/pull/75635/files
and shows up when building against a recent commit of LLVM.

[tmandry]

Hmm, getting some errors that look unrelated.

  running: "/code/clang/bin/clang" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-gdwarf-4" "-fno-omit-frame-pointer" "--target=aarch64-unknown-linux-gnu" "-ffunction-sections" "-fdata-sections" "-fPIC" "--target=aarch64-unknown-linux-gnu" "--target=aarch64-unknown-linux-gnu" "--sysroot=/code/sysroot/linux" "-mno-outline-atomics" "-I" "/code/rust/src/llvm-project/compiler-rt/lib/builtins" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding" "-fomit-frame-pointer" "-ffile-prefix-map=/code/rust/src/llvm-project/compiler-rt=." "-DVISIBILITY_HIDDEN" "-o" "/code/rust/fuchsia-build/x86_64-unknown-linux-gnu/stage2-std/aarch64-unknown-linux-gnu/release/build/compiler_builtins-cdaf04ce8a85a739/out/83a412010abc9682-divxc3.o" "-c" "/code/rust/src/llvm-project/compiler-rt/lib/builtins/divxc3.c"
  cargo:warning=/code/rust/src/llvm-project/compiler-rt/lib/builtins/divxc3.c:20:35: error: unknown type name 'xf_float'; did you mean 'tf_float'?
  cargo:warning=   20 | COMPILER_RT_ABI Lcomplex __divxc3(xf_float __a, xf_float __b, xf_float __c,
  cargo:warning=      |                                   ^~~~~~~~
  cargo:warning=      |                                   tf_float
  cargo:warning=/code/rust/src/llvm-project/compiler-rt/lib/builtins/int_types.h:198:21: note: 'tf_float' declared here
  cargo:warning=  198 | typedef long double tf_float;
  cargo:warning=      |                     ^
  cargo:warning=/code/rust/src/llvm-project/compiler-rt/lib/builtins/divxc3.c:20:49: error: unknown type name 'xf_float'; did you mean 'tf_float'?
  cargo:warning=   20 | COMPILER_RT_ABI Lcomplex __divxc3(xf_float __a, xf_float __b, xf_float __c,
  cargo:warning=      |                                                 ^~~~~~~~
  cargo:warning=      |                                                 tf_float
  cargo:warning=/code/rust/src/llvm-project/compiler-rt/lib/builtins/int_types.h:198:21: note: 'tf_float' declared here
  cargo:warning=  198 | typedef long double tf_float;
  cargo:warning=      |                     ^
  cargo:warning=/code/rust/src/llvm-project/compiler-rt/lib/builtins/divxc3.c:20:63: error: unknown type name 'xf_float'; did you mean 'tf_float'?
  cargo:warning=   20 | COMPILER_RT_ABI Lcomplex __divxc3(xf_float __a, xf_float __b, xf_float __c,
  cargo:warning=      |                                                               ^~~~~~~~
  cargo:warning=      |                                                               tf_float
  cargo:warning=/code/rust/src/llvm-project/compiler-rt/lib/builtins/int_types.h:198:21: note: 'tf_float' declared here
  cargo:warning=  198 | typedef long double tf_float;
  cargo:warning=      |                     ^
  cargo:warning=/code/rust/src/llvm-project/compiler-rt/lib/builtins/divxc3.c:21:35: error: unknown type name 'xf_float'; did you mean 'tf_float'?
  cargo:warning=   21 |                                   xf_float __d) {
  cargo:warning=      |                                   ^~~~~~~~
  cargo:warning=      |                                   tf_float
  cargo:warning=/code/rust/src/llvm-project/compiler-rt/lib/builtins/int_types.h:198:21: note: 'tf_float' declared here
  cargo:warning=  198 | typedef long double tf_float;
  cargo:warning=      |                     ^
  cargo:warning=/code/rust/src/llvm-project/compiler-rt/lib/builtins/divxc3.c:23:3: error: unknown type name 'xf_float'; did you mean 'tf_float'?
  cargo:warning=   23 |   xf_float __logbw = crt_logbl(crt_fmaxl(crt_fabsl(__c), crt_fabsl(__d)));
  cargo:warning=      |   ^~~~~~~~
  cargo:warning=      |   tf_float
  cargo:warning=/code/rust/src/llvm-project/compiler-rt/lib/builtins/int_types.h:198:21: note: 'tf_float' declared here
  cargo:warning=  198 | typedef long double tf_float;
  cargo:warning=      |                     ^
  cargo:warning=/code/rust/src/llvm-project/compiler-rt/lib/builtins/divxc3.c:29:3: error: unknown type name 'xf_float'; did you mean 'tf_float'?
  cargo:warning=   29 |   xf_float __denom = __c * __c + __d * __d;
  cargo:warning=      |   ^~~~~~~~
  cargo:warning=      |   tf_float
  cargo:warning=/code/rust/src/llvm-project/compiler-rt/lib/builtins/int_types.h:198:21: note: 'tf_float' declared here
  cargo:warning=  198 | typedef long double tf_float;
  cargo:warning=      |                     ^
  cargo:warning=6 errors generated.
  exit status: 1

[Amanieu]

The *xc/*xf files are for 80-bit floats, which only exist on x86/x86_64, except on Android and MSVC targets. These files not not be included for aarch64 targets.

[Amanieu]

I believe the compilation error has been addressed by #568.

[nikic]

I verified that after this PR is merged, it's possible to build dist-aarch64-linux with LLVM 18.

[nikic]

@Amanieu Could you please merge this PR and create a new compiler-builtins release with it?

[Amanieu]

I can't merge the PR since it is still marked as a draft.

@tmandry Is there anything left to do for this PR?

[nikic]

Would it help if I open a new non-draft PR for the change?

[Amanieu]

Actually I just realized that I can do it myself.

[Amanieu]

@nikic Published in 0.1.107.

[nikic]

Thanks!