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Always use llvm.used for coverage symbols

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This follows what clang does in CoverageMappingGen. Using just
llvm.compiler.used is insufficient at least for MSVC targets.
This commit is contained in:
Nikita Popov
2021-08-20 21:13:18 +02:00
parent f3ae726f30
commit 306259c645
6 changed files with 59 additions and 35 deletions
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2
compiler/rustc_codegen_ssa/src/traits/misc.rs
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@@ -16,9 +16,11 @@ pub trait MiscMethods<'tcx>: BackendTypes {
fn sess(&self) -> &Session;
fn codegen_unit(&self) -> &'tcx CodegenUnit<'tcx>;
fn used_statics(&self) -> &RefCell<Vec<Self::Value>>;
fn compiler_used_statics(&self) -> &RefCell<Vec<Self::Value>>;
fn set_frame_pointer_type(&self, llfn: Self::Function);
fn apply_target_cpu_attr(&self, llfn: Self::Function);
fn create_used_variable(&self);
fn create_compiler_used_variable(&self);
/// Declares the extern "C" main function for the entry point. Returns None if the symbol already exists.
fn declare_c_main(&self, fn_type: Self::Type) -> Option<Self::Function>;
}