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Expose unstable llvm14-builtins-abi target feature for cfg use

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Nikita Popov 2022-02-15 15:22:13 +01:00 committed by Nikita Popov
parent 200aa5c713
commit 0605a4122f
1 changed files with 24 additions and 16 deletions
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40
compiler/rustc_codegen_llvm/src/llvm_util.rs
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@ -217,24 +217,32 @@ pub fn check_tied_features(
pub fn target_features(sess: &Session) -> Vec<Symbol> { pub fn target_features(sess: &Session) -> Vec<Symbol> {
let target_machine = create_informational_target_machine(sess); let target_machine = create_informational_target_machine(sess);
supported_target_features(sess) let mut features: Vec<Symbol> =
.iter() supported_target_features(sess)
.filter_map( .iter()
|&(feature, gate)| { .filter_map(|&(feature, gate)| {
if sess.is_nightly_build() || gate.is_none() { Some(feature) } else { None } if sess.is_nightly_build() || gate.is_none() { Some(feature) } else { None }
}, })
) .filter(|feature| {
.filter(|feature| { for llvm_feature in to_llvm_feature(sess, feature) {
for llvm_feature in to_llvm_feature(sess, feature) { let cstr = CString::new(llvm_feature).unwrap();
let cstr = CString::new(llvm_feature).unwrap(); if unsafe { llvm::LLVMRustHasFeature(target_machine, cstr.as_ptr()) } {
if unsafe { llvm::LLVMRustHasFeature(target_machine, cstr.as_ptr()) } { return true;
return true; }
} }
} false
false })
}) .map(|feature| Symbol::intern(feature))
.map(|feature| Symbol::intern(feature)) .collect();
.collect()
// LLVM 14 changed the ABI for i128 arguments to __float/__fix builtins on Win64
// (see https://reviews.llvm.org/D110413). This unstable target feature is intended for use
// by compiler-builtins, to export the builtins with the expected, LLVM-version-dependent ABI.
// The target feature can be dropped once we no longer support older LLVM versions.
if sess.is_nightly_build() && get_version() >= (14, 0, 0) {
features.push(Symbol::intern("llvm14-builtins-abi"));
}
features
} }
pub fn print_version() { pub fn print_version() {