From e90be842fb9129aa27e5b6412f245ca39999f9f1 Mon Sep 17 00:00:00 2001
From: Scott McMurray <scottmcm@users.noreply.github.com>
Date: Sun, 29 May 2022 00:25:14 -0700
Subject: Add support for emitting functions with `coldcc` in LLVM

The eventual goal is to try using this for things like the internal panicking stuff, to see whether it helps.
---
 compiler/rustc_target/src/spec/abi.rs | 3 +++
 compiler/rustc_target/src/spec/mod.rs | 3 ++-
 2 files changed, 5 insertions(+), 1 deletion(-)

(limited to 'compiler/rustc_target/src/spec')

diff --git a/compiler/rustc_target/src/spec/abi.rs b/compiler/rustc_target/src/spec/abi.rs
index d9e571c72e5..337554dc96e 100644
--- a/compiler/rustc_target/src/spec/abi.rs
+++ b/compiler/rustc_target/src/spec/abi.rs
@@ -35,6 +35,7 @@ pub enum Abi {
     RustCall,
     PlatformIntrinsic,
     Unadjusted,
+    RustCold,
 }
 
 #[derive(Copy, Clone)]
@@ -81,6 +82,7 @@ const AbiDatas: &[AbiData] = &[
     AbiData { abi: Abi::RustCall, name: "rust-call" },
     AbiData { abi: Abi::PlatformIntrinsic, name: "platform-intrinsic" },
     AbiData { abi: Abi::Unadjusted, name: "unadjusted" },
+    AbiData { abi: Abi::RustCold, name: "rust-cold" },
 ];
 
 /// Returns the ABI with the given name (if any).
@@ -139,6 +141,7 @@ impl Abi {
             RustCall => 31,
             PlatformIntrinsic => 32,
             Unadjusted => 33,
+            RustCold => 34,
         };
         debug_assert!(
             AbiDatas
diff --git a/compiler/rustc_target/src/spec/mod.rs b/compiler/rustc_target/src/spec/mod.rs
index 6dd245b047c..866cd5f0fe7 100644
--- a/compiler/rustc_target/src/spec/mod.rs
+++ b/compiler/rustc_target/src/spec/mod.rs
@@ -1618,7 +1618,8 @@ impl Target {
             | PlatformIntrinsic
             | Unadjusted
             | Cdecl { .. }
-            | EfiApi => true,
+            | EfiApi
+            | RustCold => true,
             X86Interrupt => ["x86", "x86_64"].contains(&&self.arch[..]),
             Aapcs { .. } => "arm" == self.arch,
             CCmseNonSecureCall => ["arm", "aarch64"].contains(&&self.arch[..]),
-- 
cgit 1.4.1-3-g733a5