From bc96516a28d9e8e816b0f45c628a9cd49a2f380d Mon Sep 17 00:00:00 2001
From: Nikita Popov <nikita.ppv@gmail.com>
Date: Sat, 20 Feb 2021 17:02:23 +0100
Subject: Mark pure asm as willreturn

---
 compiler/rustc_codegen_llvm/src/asm.rs      | 1 +
 compiler/rustc_codegen_llvm/src/llvm/ffi.rs | 1 +
 2 files changed, 2 insertions(+)

(limited to 'compiler/rustc_codegen_llvm/src')

diff --git a/compiler/rustc_codegen_llvm/src/asm.rs b/compiler/rustc_codegen_llvm/src/asm.rs
index 26815de403f..38c8ae711a4 100644
--- a/compiler/rustc_codegen_llvm/src/asm.rs
+++ b/compiler/rustc_codegen_llvm/src/asm.rs
@@ -304,6 +304,7 @@ impl AsmBuilderMethods<'tcx> for Builder<'a, 'll, 'tcx> {
             } else if options.contains(InlineAsmOptions::READONLY) {
                 llvm::Attribute::ReadOnly.apply_callsite(llvm::AttributePlace::Function, result);
             }
+            llvm::Attribute::WillReturn.apply_callsite(llvm::AttributePlace::Function, result);
         } else if options.contains(InlineAsmOptions::NOMEM) {
             llvm::Attribute::InaccessibleMemOnly
                 .apply_callsite(llvm::AttributePlace::Function, result);
diff --git a/compiler/rustc_codegen_llvm/src/llvm/ffi.rs b/compiler/rustc_codegen_llvm/src/llvm/ffi.rs
index 7f7575e58c9..e6d60044c84 100644
--- a/compiler/rustc_codegen_llvm/src/llvm/ffi.rs
+++ b/compiler/rustc_codegen_llvm/src/llvm/ffi.rs
@@ -132,6 +132,7 @@ pub enum Attribute {
     ReadNone = 26,
     InaccessibleMemOnly = 27,
     SanitizeHWAddress = 28,
+    WillReturn = 29,
 }
 
 /// LLVMIntPredicate
-- 
cgit 1.4.1-3-g733a5