From b93041af0a3100feb8785a6ff17b242c21d1a6f8 Mon Sep 17 00:00:00 2001
From: Antoni Boucher <bouanto@zoho.com>
Date: Sun, 16 Apr 2023 14:12:42 -0400
Subject: [PATCH] Add support for inline attribute

---
 Cargo.lock        |  4 ++--
 Cargo.toml        |  2 +-
 src/attributes.rs | 39 +++++++++++++++++++++++++++++++++++++++
 src/lib.rs        |  2 ++
 4 files changed, 44 insertions(+), 3 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 6e94c03a1540..3c5357eec105 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -35,7 +35,7 @@ dependencies = [
 [[package]]
 name = "gccjit"
 version = "1.0.0"
-source = "git+https://github.com/antoyo/gccjit.rs#98a29ddd64f662beb5d11810434fbeaad4a1856c"
+source = "git+https://github.com/antoyo/gccjit.rs#d6e52626cfc6f487094a5d5ac66302baf3439984"
 dependencies = [
  "gccjit_sys",
 ]
@@ -43,7 +43,7 @@ dependencies = [
 [[package]]
 name = "gccjit_sys"
 version = "0.0.1"
-source = "git+https://github.com/antoyo/gccjit.rs#98a29ddd64f662beb5d11810434fbeaad4a1856c"
+source = "git+https://github.com/antoyo/gccjit.rs#d6e52626cfc6f487094a5d5ac66302baf3439984"
 dependencies = [
  "libc",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 81066d9ce1f0..7285e3eaf519 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -25,7 +25,7 @@ master = ["gccjit/master"]
 gccjit = { git = "https://github.com/antoyo/gccjit.rs" }
 
 # Local copy.
-#gccjit = { path = "../gccjit.rs" }
+# gccjit = { path = "../gccjit.rs" }
 
 smallvec = { version = "1.6.1", features = ["union", "may_dangle"] }
 
diff --git a/src/attributes.rs b/src/attributes.rs
index 243a1a36dd09..23c1f886e09e 100644
--- a/src/attributes.rs
+++ b/src/attributes.rs
@@ -2,9 +2,13 @@
 use gccjit::FnAttribute;
 use gccjit::Function;
 use rustc_attr::InstructionSetAttr;
+#[cfg(feature="master")]
+use rustc_attr::InlineAttr;
 use rustc_codegen_ssa::target_features::tied_target_features;
 use rustc_data_structures::fx::FxHashMap;
 use rustc_middle::ty;
+#[cfg(feature="master")]
+use rustc_middle::middle::codegen_fn_attrs::CodegenFnAttrFlags;
 use rustc_session::Session;
 use rustc_span::symbol::sym;
 use smallvec::{smallvec, SmallVec};
@@ -67,6 +71,24 @@ fn to_gcc_features<'a>(sess: &Session, s: &'a str) -> SmallVec<[&'a str; 2]> {
     }
 }
 
+/// Get GCC attribute for the provided inline heuristic.
+#[cfg(feature="master")]
+#[inline]
+fn inline_attr<'gcc, 'tcx>(cx: &CodegenCx<'gcc, 'tcx>, inline: InlineAttr) -> Option<FnAttribute<'gcc>> {
+    match inline {
+        InlineAttr::Hint => Some(FnAttribute::Inline),
+        InlineAttr::Always => Some(FnAttribute::AlwaysInline),
+        InlineAttr::Never => {
+            if cx.sess().target.arch != "amdgpu" {
+                Some(FnAttribute::NoInline)
+            } else {
+                None
+            }
+        }
+        InlineAttr::None => None,
+    }
+}
+
 /// Composite function which sets GCC attributes for function depending on its AST (`#[attribute]`)
 /// attributes.
 pub fn from_fn_attrs<'gcc, 'tcx>(
@@ -77,6 +99,23 @@ pub fn from_fn_attrs<'gcc, 'tcx>(
 ) {
     let codegen_fn_attrs = cx.tcx.codegen_fn_attrs(instance.def_id());
 
+    #[cfg(feature="master")]
+    {
+        let inline =
+            if codegen_fn_attrs.flags.contains(CodegenFnAttrFlags::NAKED) {
+                InlineAttr::Never
+            }
+            else if codegen_fn_attrs.inline == InlineAttr::None && instance.def.requires_inline(cx.tcx) {
+                InlineAttr::Hint
+            }
+            else {
+                codegen_fn_attrs.inline
+            };
+        if let Some(attr) = inline_attr(cx, inline) {
+            func.add_attribute(attr);
+        }
+    }
+
     let function_features =
         codegen_fn_attrs.target_features.iter().map(|features| features.as_str()).collect::<Vec<&str>>();
 
diff --git a/src/lib.rs b/src/lib.rs
index 1b7feb5f8a18..3b26e248fc26 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -110,6 +110,8 @@ impl CodegenBackend for GccCodegenBackend {
     }
 
     fn init(&self, sess: &Session) {
+        #[cfg(feature="master")]
+        gccjit::set_global_personality_function_name(b"rust_eh_personality\0");
         if sess.lto() != Lto::No {
             sess.emit_warning(LTONotSupported {});
         }