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x86_64-win: Enable f128 on LLVM 23+ #158918

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Merged
rust-bors merged 1 commit into from
Aug 14, 2026
+6 −3
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x86_64-win: Enable f128 on LLVM 23+ #158918

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9 changes: 6 additions & 3 deletions compiler/rustc_codegen_llvm/src/llvm_util.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -374,7 +374,8 @@ fn update_target_reliable_float_cfg(sess: &Session, cfg: &mut TargetConfig) {
cfg.has_reliable_f16 = match (target_arch, target_os) {
// Unsupported <https://github.com/llvm/llvm-project/issues/94434> (fixed in llvm22)
(Arch::Arm64EC, _) if major < 22 => false,
// MinGW ABI bugs <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115054>
// MinGW ABI bugs <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115054> resolved in GCC 16
// but our toolchain hasn't been updated.
(Arch::X86_64, Os::Windows) if *target_env == Env::Gnu && *target_abi != CfgAbi::Llvm => {
false
}
Expand All @@ -401,8 +402,10 @@ fn update_target_reliable_float_cfg(sess: &Session, cfg: &mut TargetConfig) {
(Arch::PowerPC | Arch::PowerPC64, _) => false,
// ABI unsupported <https://github.com/llvm/llvm-project/issues/41838> (fixed in llvm22)
(Arch::Sparc, _) if major < 22 => false,
// MinGW ABI bugs <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115054>
(Arch::X86_64, Os::Windows) if *target_env == Env::Gnu && *target_abi != CfgAbi::Llvm => {
// MinGW ABI bugs <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115054> (fixed in llvm23)
(Arch::X86_64, Os::Windows)
if *target_env == Env::Gnu && *target_abi != CfgAbi::Llvm && major < 23 =>
{
false
}
// There are no known problems on other platforms, so the only requirement is that symbols
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