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Add implied features to non-target-feature functions

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This commit is contained in:
Caleb Zulawski 2024-08-04 15:32:17 -04:00
parent 5006711744
commit 6b96a60611
3 changed files with 25 additions and 9 deletions
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26
compiler/rustc_codegen_llvm/src/llvm_util.rs
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@ -8,6 +8,7 @@ use libc::c_int;
use rustc_codegen_ssa::base::wants_wasm_eh; use rustc_codegen_ssa::base::wants_wasm_eh;
use rustc_data_structures::fx::{FxHashMap, FxHashSet}; use rustc_data_structures::fx::{FxHashMap, FxHashSet};
use rustc_data_structures::small_c_str::SmallCStr; use rustc_data_structures::small_c_str::SmallCStr;
use rustc_data_structures::unord::UnordSet;
use rustc_fs_util::path_to_c_string; use rustc_fs_util::path_to_c_string;
use rustc_middle::bug; use rustc_middle::bug;
use rustc_session::config::{PrintKind, PrintRequest}; use rustc_session::config::{PrintKind, PrintRequest};
@ -553,11 +554,26 @@ pub(crate) fn global_llvm_features(
let supported_features = sess.target.supported_target_features(); let supported_features = sess.target.supported_target_features();
let (llvm_major, _, _) = get_version(); let (llvm_major, _, _) = get_version();
let mut featsmap = FxHashMap::default(); let mut featsmap = FxHashMap::default();
let feats = sess
.opts // insert implied features
.cg let mut all_rust_features = vec![];
.target_feature for feature in sess.opts.cg.target_feature.split(',') {
.split(',') match feature.strip_prefix('+') {
Some(feature) => all_rust_features.extend(
UnordSet::from(
sess.target
.implied_target_features(std::iter::once(Symbol::intern(feature))),
)
.to_sorted_stable_ord()
.iter()
.map(|s| format!("+{}", s.as_str())),
),
_ => all_rust_features.push(feature.to_string()),
}
}
let feats = all_rust_features
.iter()
.filter_map(|s| { .filter_map(|s| {
let enable_disable = match s.chars().next() { let enable_disable = match s.chars().next() {
None => return None, None => return None,

6
tests/codegen/target-feature-overrides.rs
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@ -1,7 +1,7 @@
//@ revisions: COMPAT INCOMPAT //@ revisions: COMPAT INCOMPAT
//@ needs-llvm-components: x86 //@ needs-llvm-components: x86
//@ compile-flags: --target=x86_64-unknown-linux-gnu -Copt-level=3 //@ compile-flags: --target=x86_64-unknown-linux-gnu -Copt-level=3
//@ [COMPAT] compile-flags: -Ctarget-feature=+avx2,+avx //@ [COMPAT] compile-flags: -Ctarget-feature=+avx2
//@ [INCOMPAT] compile-flags: -Ctarget-feature=-avx2,-avx //@ [INCOMPAT] compile-flags: -Ctarget-feature=-avx2,-avx
// See also tests/assembly/target-feature-multiple.rs // See also tests/assembly/target-feature-multiple.rs
@ -39,8 +39,8 @@ pub unsafe fn banana() -> u32 {
} }
// CHECK: attributes [[APPLEATTRS]] // CHECK: attributes [[APPLEATTRS]]
// COMPAT-SAME: "target-features"="+avx2,+avx,{{.*}}" // COMPAT-SAME: "target-features"="+avx,+avx2,{{.*}}"
// INCOMPAT-SAME: "target-features"="-avx2,-avx,+avx,{{.*}}" // INCOMPAT-SAME: "target-features"="-avx2,-avx,+avx,{{.*}}"
// CHECK: attributes [[BANANAATTRS]] // CHECK: attributes [[BANANAATTRS]]
// COMPAT-SAME: "target-features"="+avx2,+avx,{{.*}}" // COMPAT-SAME: "target-features"="+avx,+avx2,{{.*}}"
// INCOMPAT-SAME: "target-features"="-avx2,-avx" // INCOMPAT-SAME: "target-features"="-avx2,-avx"

2
tests/codegen/tied-features-strength.rs
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@ -8,7 +8,7 @@
// is LLVM-14 we can remove the optional regex matching for this feature. // is LLVM-14 we can remove the optional regex matching for this feature.
//@ [ENABLE_SVE] compile-flags: -C target-feature=+sve -Copt-level=0 //@ [ENABLE_SVE] compile-flags: -C target-feature=+sve -Copt-level=0
// ENABLE_SVE: attributes #0 = { {{.*}} "target-features"="{{((\+outline-atomics,?)|(\+v8a,?)?|(\+sve,?)|(\+neon,?))*}}" } // ENABLE_SVE: attributes #0 = { {{.*}} "target-features"="{{((\+outline-atomics,?)|(\+v8a,?)?|(\+sve,?)|(\+neon,?)|(\+fp-armv8,?))*}}" }
//@ [DISABLE_SVE] compile-flags: -C target-feature=-sve -Copt-level=0 //@ [DISABLE_SVE] compile-flags: -C target-feature=-sve -Copt-level=0
// DISABLE_SVE: attributes #0 = { {{.*}} "target-features"="{{((\+outline-atomics,?)|(\+v8a,?)?|(-sve,?)|(\+neon,?))*}}" } // DISABLE_SVE: attributes #0 = { {{.*}} "target-features"="{{((\+outline-atomics,?)|(\+v8a,?)?|(-sve,?)|(\+neon,?))*}}" }