Auto merge of #69478 - avr-rust:avr-support-upstream, r=jonas-schievink

Enable AVR as a Tier 3 target upstream

Tracking issue: #44052.

Things intentionally left out of the initial upstream:

* The `target_cpu` flag

I have made the cleanup suggestions by @jplatte and @jplatte in https://github.com/avr-rust/rust/commit/043550d9db0582add42e5837f636f61acb26b915.

Anybody feel free to give the branch a test and see how it fares, or make suggestions on the code patch itself.

2 files changed, 4 insertions, 0 deletions

diff --git a/src/librustc_codegen_llvm/abi.rs b/src/librustc_codegen_llvm/abi.rs
index 8e9c5f25ccb..099c402703d 100644
--- a/src/librustc_codegen_llvm/abi.rs
+++ b/src/librustc_codegen_llvm/abi.rs
@@ -375,6 +375,8 @@ impl<'tcx> FnAbiLlvmExt<'tcx> for FnAbi<'tcx, Ty<'tcx>> {
         match self.conv {
             Conv::C | Conv::Rust => llvm::CCallConv,
             Conv::AmdGpuKernel => llvm::AmdGpuKernel,
+            Conv::AvrInterrupt => llvm::AvrInterrupt,
+            Conv::AvrNonBlockingInterrupt => llvm::AvrNonBlockingInterrupt,
             Conv::ArmAapcs => llvm::ArmAapcsCallConv,
             Conv::Msp430Intr => llvm::Msp430Intr,
             Conv::PtxKernel => llvm::PtxKernel,
diff --git a/src/librustc_codegen_llvm/llvm/ffi.rs b/src/librustc_codegen_llvm/llvm/ffi.rs
index 3c981af73ab..54cf99e1c6d 100644
--- a/src/librustc_codegen_llvm/llvm/ffi.rs
+++ b/src/librustc_codegen_llvm/llvm/ffi.rs
@@ -45,6 +45,8 @@ pub enum CallConv {
     X86_64_Win64 = 79,
     X86_VectorCall = 80,
     X86_Intr = 83,
+    AvrNonBlockingInterrupt = 84,
+    AvrInterrupt = 85,
     AmdGpuKernel = 91,
 }