1 files changed, 40 insertions, 15 deletions

diff --git a/compiler/rustc_codegen_llvm/src/context.rs b/compiler/rustc_codegen_llvm/src/context.rs
index 5d56c93f835..35c866d48a4 100644
--- a/compiler/rustc_codegen_llvm/src/context.rs
+++ b/compiler/rustc_codegen_llvm/src/context.rs
@@ -75,6 +75,10 @@ pub struct CodegenCx<'ll, 'tcx> {
     /// See <https://llvm.org/docs/LangRef.html#the-llvm-used-global-variable> for details
     pub used_statics: RefCell<Vec<&'ll Value>>,
 
+    /// Statics that will be placed in the llvm.compiler.used variable
+    /// See <https://llvm.org/docs/LangRef.html#the-llvm-compiler-used-global-variable> for details
+    pub compiler_used_statics: RefCell<Vec<&'ll Value>>,
+
     /// Mapping of non-scalar types to llvm types and field remapping if needed.
     pub type_lowering: RefCell<FxHashMap<(Ty<'tcx>, Option<VariantIdx>), TypeLowering<'ll>>>,
 
@@ -115,10 +119,6 @@ fn to_llvm_tls_model(tls_model: TlsModel) -> llvm::ThreadLocalMode {
     }
 }
 
-fn strip_powerpc64_vectors(data_layout: String) -> String {
-    data_layout.replace("-v256:256:256-v512:512:512", "")
-}
-
 pub unsafe fn create_module(
     tcx: TyCtxt<'_>,
     llcx: &'ll llvm::Context,
@@ -130,7 +130,18 @@ pub unsafe fn create_module(
 
     let mut target_data_layout = sess.target.data_layout.clone();
     if llvm_util::get_version() < (12, 0, 0) && sess.target.arch == "powerpc64" {
-        target_data_layout = strip_powerpc64_vectors(target_data_layout);
+        target_data_layout = target_data_layout.replace("-v256:256:256-v512:512:512", "");
+    }
+    if llvm_util::get_version() < (13, 0, 0) {
+        if sess.target.arch == "powerpc64" {
+            target_data_layout = target_data_layout.replace("-S128", "");
+        }
+        if sess.target.arch == "wasm32" {
+            target_data_layout = "e-m:e-p:32:32-i64:64-n32:64-S128".to_string();
+        }
+        if sess.target.arch == "wasm64" {
+            target_data_layout = "e-m:e-p:64:64-i64:64-n32:64-S128".to_string();
+        }
     }
 
     // Ensure the data-layout values hardcoded remain the defaults.
@@ -318,6 +329,7 @@ impl<'ll, 'tcx> CodegenCx<'ll, 'tcx> {
             const_globals: Default::default(),
             statics_to_rauw: RefCell::new(Vec::new()),
             used_statics: RefCell::new(Vec::new()),
+            compiler_used_statics: RefCell::new(Vec::new()),
             type_lowering: Default::default(),
             scalar_lltypes: Default::default(),
             pointee_infos: Default::default(),
@@ -340,6 +352,18 @@ impl<'ll, 'tcx> CodegenCx<'ll, 'tcx> {
     pub fn coverage_context(&'a self) -> Option<&'a coverageinfo::CrateCoverageContext<'ll, 'tcx>> {
         self.coverage_cx.as_ref()
     }
+
+    fn create_used_variable_impl(&self, name: &'static CStr, values: &[&'ll Value]) {
+        let section = cstr!("llvm.metadata");
+        let array = self.const_array(&self.type_ptr_to(self.type_i8()), values);
+
+        unsafe {
+            let g = llvm::LLVMAddGlobal(self.llmod, self.val_ty(array), name.as_ptr());
+            llvm::LLVMSetInitializer(g, array);
+            llvm::LLVMRustSetLinkage(g, llvm::Linkage::AppendingLinkage);
+            llvm::LLVMSetSection(g, section.as_ptr());
+        }
+    }
 }
 
 impl MiscMethods<'tcx> for CodegenCx<'ll, 'tcx> {
@@ -430,6 +454,10 @@ impl MiscMethods<'tcx> for CodegenCx<'ll, 'tcx> {
         &self.used_statics
     }
 
+    fn compiler_used_statics(&self) -> &RefCell<Vec<&'ll Value>> {
+        &self.compiler_used_statics
+    }
+
     fn set_frame_pointer_type(&self, llfn: &'ll Value) {
         attributes::set_frame_pointer_type(self, llfn)
     }
@@ -440,17 +468,14 @@ impl MiscMethods<'tcx> for CodegenCx<'ll, 'tcx> {
     }
 
     fn create_used_variable(&self) {
-        let name = cstr!("llvm.used");
-        let section = cstr!("llvm.metadata");
-        let array =
-            self.const_array(&self.type_ptr_to(self.type_i8()), &*self.used_statics.borrow());
+        self.create_used_variable_impl(cstr!("llvm.used"), &*self.used_statics.borrow());
+    }
 
-        unsafe {
-            let g = llvm::LLVMAddGlobal(self.llmod, self.val_ty(array), name.as_ptr());
-            llvm::LLVMSetInitializer(g, array);
-            llvm::LLVMRustSetLinkage(g, llvm::Linkage::AppendingLinkage);
-            llvm::LLVMSetSection(g, section.as_ptr());
-        }
+    fn create_compiler_used_variable(&self) {
+        self.create_used_variable_impl(
+            cstr!("llvm.compiler.used"),
+            &*self.compiler_used_statics.borrow(),
+        );
     }
 
     fn declare_c_main(&self, fn_type: Self::Type) -> Option<Self::Function> {