From 6fad1bac72dafc414bd7083f83dccb50a35d08d8 Mon Sep 17 00:00:00 2001
From: Antoni Boucher <bouanto@zoho.com>
Date: Wed, 30 Apr 2025 11:11:17 -0400
Subject: [PATCH] Support more calling convention attributes

---
 Cargo.lock        |  8 +++---
 Cargo.toml        |  2 +-
 libgccjit.version |  2 +-
 src/abi.rs        | 65 ++++++++++++++++++++++++++++++-----------------
 4 files changed, 48 insertions(+), 29 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 832603aa792..967a51a1cc6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -56,18 +56,18 @@ dependencies = [
 
 [[package]]
 name = "gccjit"
-version = "2.5.0"
+version = "2.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2895ddec764de7ac76fe6c056050c4801a80109c066f177a00a9cc8dee02b29b"
+checksum = "ae99a89184220d967dd300139f2d2ae7d52c1a69d632b24aacc57c54625254ce"
 dependencies = [
  "gccjit_sys",
 ]
 
 [[package]]
 name = "gccjit_sys"
-version = "0.6.0"
+version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ac133db68db8a6a8b2c51ef4b18d8ea16682d5814c4641272fe37bbbc223d5f3"
+checksum = "24edb7bfe2b7b27c6d09ed23eebfcab0b359c8fe978433f902943e6f127a0f1b"
 dependencies = [
  "libc",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index b50f2a626d5..717eaf9e058 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,7 +22,7 @@ master = ["gccjit/master"]
 default = ["master"]
 
 [dependencies]
-gccjit = "2.5"
+gccjit = "2.7"
 #gccjit = { git = "https://github.com/rust-lang/gccjit.rs" }
 
 # Local copy.
diff --git a/libgccjit.version b/libgccjit.version
index 125b04004b0..d06646dacc3 100644
--- a/libgccjit.version
+++ b/libgccjit.version
@@ -1 +1 @@
-0ea98a1365b81f7488073512c850e8ee951a4afd
+8b194529188f9d3a98cc211caa805a5355bfa8f0
diff --git a/src/abi.rs b/src/abi.rs
index a96b18e01c0..d882d3eecf4 100644
--- a/src/abi.rs
+++ b/src/abi.rs
@@ -9,9 +9,9 @@ use rustc_middle::ty::Ty;
 use rustc_middle::ty::layout::LayoutOf;
 #[cfg(feature = "master")]
 use rustc_session::config;
-#[cfg(feature = "master")]
-use rustc_target::callconv::Conv;
 use rustc_target::callconv::{ArgAttributes, CastTarget, FnAbi, PassMode};
+#[cfg(feature = "master")]
+use rustc_target::callconv::{Conv, RiscvInterruptKind};
 
 use crate::builder::Builder;
 use crate::context::CodegenCx;
@@ -240,38 +240,57 @@ impl<'gcc, 'tcx> FnAbiGccExt<'gcc, 'tcx> for FnAbi<'tcx, Ty<'tcx>> {
 
 #[cfg(feature = "master")]
 pub fn conv_to_fn_attribute<'gcc>(conv: Conv, arch: &str) -> Option<FnAttribute<'gcc>> {
-    // TODO: handle the calling conventions returning None.
     let attribute = match conv {
-        Conv::C
-        | Conv::Rust
-        | Conv::CCmseNonSecureCall
-        | Conv::CCmseNonSecureEntry
-        | Conv::RiscvInterrupt { .. } => return None,
-        Conv::Cold => return None,
+        Conv::C | Conv::Rust => return None,
+        Conv::CCmseNonSecureCall => {
+            if arch == "arm" {
+                FnAttribute::ArmCmseNonsecureCall
+            } else {
+                return None;
+            }
+        }
+        Conv::CCmseNonSecureEntry => {
+            if arch == "arm" {
+                FnAttribute::ArmCmseNonsecureEntry
+            } else {
+                return None;
+            }
+        }
+        Conv::Cold => FnAttribute::Cold,
+        // NOTE: the preserve attributes are not yet implemented in GCC:
+        // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110899
         Conv::PreserveMost => return None,
         Conv::PreserveAll => return None,
         Conv::GpuKernel => {
-            // TODO(antoyo): remove clippy allow attribute when this is implemented.
-            #[allow(clippy::if_same_then_else)]
             if arch == "amdgpu" {
-                return None;
+                FnAttribute::GcnAmdGpuHsaKernel
             } else if arch == "nvptx64" {
-                return None;
+                FnAttribute::NvptxKernel
             } else {
                 panic!("Architecture {} does not support GpuKernel calling convention", arch);
             }
         }
-        Conv::AvrInterrupt => return None,
-        Conv::AvrNonBlockingInterrupt => return None,
-        Conv::ArmAapcs => return None,
-        Conv::Msp430Intr => return None,
-        Conv::X86Fastcall => return None,
-        Conv::X86Intr => return None,
-        Conv::X86Stdcall => return None,
-        Conv::X86ThisCall => return None,
+        // TODO(antoyo): check if those AVR attributes are mapped correctly.
+        Conv::AvrInterrupt => FnAttribute::AvrSignal,
+        Conv::AvrNonBlockingInterrupt => FnAttribute::AvrInterrupt,
+        Conv::ArmAapcs => FnAttribute::ArmPcs("aapcs"),
+        Conv::Msp430Intr => FnAttribute::Msp430Interrupt,
+        Conv::RiscvInterrupt { kind } => {
+            let kind = match kind {
+                RiscvInterruptKind::Machine => "machine",
+                RiscvInterruptKind::Supervisor => "supervisor",
+            };
+            FnAttribute::RiscvInterrupt(kind)
+        }
+        Conv::X86Fastcall => FnAttribute::X86FastCall,
+        Conv::X86Intr => FnAttribute::X86Interrupt,
+        Conv::X86Stdcall => FnAttribute::X86Stdcall,
+        Conv::X86ThisCall => FnAttribute::X86ThisCall,
+        // NOTE: the vectorcall calling convention is not yet implemented in GCC:
+        // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89485
         Conv::X86VectorCall => return None,
-        Conv::X86_64SysV => FnAttribute::SysvAbi,
-        Conv::X86_64Win64 => FnAttribute::MsAbi,
+        Conv::X86_64SysV => FnAttribute::X86SysvAbi,
+        Conv::X86_64Win64 => FnAttribute::X86MsAbi,
     };
     Some(attribute)
 }