Commit f028b9b

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compiler: Apply target features to the entry function

1 parent 033c0a4 commit f028b9bCopy full SHA for f028b9b

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2 files changed

+20

-10

lines changed

compiler/rustc_codegen_llvm/src
- attributes.rs
- context.rs

2 files changed

+20

-10

lines changed

`‎compiler/rustc_codegen_llvm/src/attributes.rs‎`

Lines changed: 14 additions & 8 deletions

Original file line number	Diff line number	Diff line change
`@@ -296,6 +296,19 @@ pub(crate) fn tune_cpu_attr<'ll>(cx: &CodegenCx<'ll, '_>) -> Option<&'ll Attribu`
`296`	`296`	`.map(\|tune_cpu\| llvm::CreateAttrStringValue(cx.llcx, "tune-cpu", tune_cpu))`
`297`	`297`	`}`
`298`	`298`
	`299`	+/// Get the `target-features` LLVM attribute.
	`300`	`+pub(crate) fn target_features_attr<'ll>(`
	`301`	`+ cx: &CodegenCx<'ll, '_>,`
	`302`	`+ function_features: Vec<String>,`
	`303`	`+) -> Option<&'ll Attribute> {`
	`304`	`+ let global_features = cx.tcx.global_backend_features(()).iter().map(String::as_str);`
	`305`	`+ let function_features = function_features.iter().map(String::as_str);`
	`306`	`+ let target_features =`
	`307`	`+ global_features.chain(function_features).intersperse(",").collect::<String>();`
	`308`	`+ (!target_features.is_empty())`
	`309`	`+ .then(\|\| llvm::CreateAttrStringValue(cx.llcx, "target-features", &target_features))`
	`310`	`+}`
	`311`	`+`
`299`	`312`	/// Get the `NonLazyBind` LLVM attribute,
`300`	`313`	`/// if the codegen options allow skipping the PLT.`
`301`	`314`	`pub(crate) fn non_lazy_bind_attr<'ll>(cx: &CodegenCx<'ll, '_>) -> Option<&'ll Attribute> {`
`@@ -523,14 +536,7 @@ pub(crate) fn llfn_attrs_from_instance<'ll, 'tcx>(`
`523`	`536`	`}`
`524`	`537`	`}`
`525`	`538`
`526`		`- let global_features = cx.tcx.global_backend_features(()).iter().map(\|s\| s.as_str());`
`527`		`- let function_features = function_features.iter().map(\|s\| s.as_str());`
`528`		`- let target_features: String =`
`529`		`- global_features.chain(function_features).intersperse(",").collect();`
`530`		`-`
`531`		`- if !target_features.is_empty() {`
`532`		`- to_add.push(llvm::CreateAttrStringValue(cx.llcx, "target-features", &target_features));`
`533`		`- }`
	`539`	`+ to_add.extend(target_features_attr(cx, function_features));`
`534`	`540`
`535`	`541`	`attributes::apply_to_llfn(llfn, Function, &to_add);`
`536`	`542`	`}`

`‎compiler/rustc_codegen_llvm/src/context.rs‎`

Lines changed: 6 additions & 2 deletions

Original file line number	Diff line number	Diff line change
`@@ -853,15 +853,19 @@ impl<'ll, 'tcx> MiscCodegenMethods<'tcx> for CodegenCx<'ll, 'tcx> {`
`853`	`853`	`fn declare_c_main(&self, fn_type: Self::Type) -> Option<Self::Function> {`
`854`	`854`	`let entry_name = self.sess().target.entry_name.as_ref();`
`855`	`855`	`if self.get_declared_value(entry_name).is_none() {`
`856`		`- Some(self.declare_entry_fn(`
	`856`	`+ let llfn = self.declare_entry_fn(`
`857`	`857`	`entry_name,`
`858`	`858`	`llvm::CallConv::from_conv(`
`859`	`859`	`self.sess().target.entry_abi,`
`860`	`860`	`self.sess().target.arch.borrow(),`
`861`	`861`	`),`
`862`	`862`	`llvm::UnnamedAddr::Global,`
`863`	`863`	`fn_type,`
`864`		`- ))`
	`864`	`+ );`
	`865`	`+ if let Some(attr) = attributes::target_features_attr(self, vec![]) {`
	`866`	`+ attributes::apply_to_llfn(llfn, llvm::AttributePlace::Function, &[attr])`
	`867`	`+ }`
	`868`	`+ Some(llfn)`
`865`	`869`	`} else {`
`866`	`870`	`// If the symbol already exists, it is an error: for example, the user wrote`
`867`	`871`	`// #[no_mangle] extern "C" fn main(..) {..}`

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Commit f028b9b

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2 files changed

2 files changed

`‎compiler/rustc_codegen_llvm/src/attributes.rs‎`

`‎compiler/rustc_codegen_llvm/src/context.rs‎`

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