Support more calling convention attributes

Author: antoyo

Cargo.lock

@@ -22,7 +22,7 @@ master = ["gccjit/master"]
 default = ["master"]
 
 [dependencies]
-gccjit = "2.5"
+gccjit = "2.6"
 #gccjit = { git = "https://github.com/rust-lang/gccjit.rs" }
 
 # Local copy.

Cargo.toml

@@ -1 +1 @@
-0ea98a1365b81f7488073512c850e8ee951a4afd
+8b194529188f9d3a98cc211caa805a5355bfa8f0

libgccjit.version

@@ -251,27 +251,26 @@ pub fn conv_to_fn_attribute<'gcc>(conv: Conv, arch: &str) -> Option<FnAttribute<
         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::X86Fastcall => FnAttribute::X86FastCall,
+        Conv::X86Intr => FnAttribute::X86Interrupt,
+        Conv::X86Stdcall => FnAttribute::X86Stdcall,
+        Conv::X86ThisCall => FnAttribute::X86ThisCall,
         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)
 }