1 files changed, 36 insertions, 0 deletions
diff --git a/src/tools/rust-analyzer/crates/hir-ty/src/layout/target.rs b/src/tools/rust-analyzer/crates/hir-ty/src/layout/target.rs
new file mode 100644
index 000000000..37b831652
--- /dev/null
+++ b/src/tools/rust-analyzer/crates/hir-ty/src/layout/target.rs
@@ -0,0 +1,36 @@
+//! Target dependent parameters needed for layouts
+
+use std::sync::Arc;
+
+use base_db::CrateId;
+use hir_def::layout::{Endian, Size, TargetDataLayout};
+
+use crate::db::HirDatabase;
+
+pub fn target_data_layout_query(db: &dyn HirDatabase, krate: CrateId) -> Arc<TargetDataLayout> {
+    let crate_graph = db.crate_graph();
+    let target_layout = &crate_graph[krate].target_layout;
+    let cfg_options = &crate_graph[krate].cfg_options;
+    Arc::new(
+        target_layout
+            .as_ref()
+            .and_then(|it| TargetDataLayout::parse_from_llvm_datalayout_string(it).ok())
+            .unwrap_or_else(|| {
+                let endian = match cfg_options.get_cfg_values("target_endian").next() {
+                    Some(x) if x.as_str() == "big" => Endian::Big,
+                    _ => Endian::Little,
+                };
+                let pointer_size = Size::from_bytes(
+                    match cfg_options.get_cfg_values("target_pointer_width").next() {
+                        Some(x) => match x.as_str() {
+                            "16" => 2,
+                            "32" => 4,
+                            _ => 8,
+                        },
+                        _ => 8,
+                    },
+                );
+                TargetDataLayout { endian, pointer_size, ..TargetDataLayout::default() }
+            }),
+    )
+}