- Actually add patch...

OBS-URL: https://build.opensuse.org/package/show/devel:tools:compiler/llvm14?expand=0&rev=7

llvm-rust-mangle-for-fastcall.patch

@@ -0,0 +1,41 @@
+From 54b909de682bfa4e3389b680b0916ab18c99952a Mon Sep 17 00:00:00 2001
+From: Amanieu d'Antras <amanieu@gmail.com>
+Date: Fri, 25 Feb 2022 22:06:47 +0000
+Subject: [PATCH] [Mangler] Mangle aliases to fastcall/vectorcall functions
+ correctly
+
+These aliases are produced by MergeFunctions and need to be mangled according to the calling convention of the function they are pointing to instead of defaulting to the C calling convention.
+
+Reviewed By: rnk
+
+Differential Revision: https://reviews.llvm.org/D120382
+---
+ llvm/lib/IR/Mangler.cpp                            | 2 +-
+ llvm/test/CodeGen/X86/fastcall-correct-mangling.ll | 4 ++++
+ 2 files changed, 5 insertions(+), 1 deletion(-)
+
+diff --git a/llvm/lib/IR/Mangler.cpp b/llvm/lib/IR/Mangler.cpp
+index 2399ea27ee9d4..b8e3e40e4c1d5 100644
+--- a/llvm/lib/IR/Mangler.cpp
++++ b/llvm/lib/IR/Mangler.cpp
+@@ -144,7 +144,7 @@ void Mangler::getNameWithPrefix(raw_ostream &OS, const GlobalValue *GV,
+ 
+   // Mangle functions with Microsoft calling conventions specially.  Only do
+   // this mangling for x86_64 vectorcall and 32-bit x86.
+-  const Function *MSFunc = dyn_cast<Function>(GV);
++  const Function *MSFunc = dyn_cast_or_null<Function>(GV->getAliaseeObject());
+ 
+   // Don't add byte count suffixes when '\01' or '?' are in the first
+   // character.
+diff --git a/llvm/test/CodeGen/X86/fastcall-correct-mangling.ll b/llvm/test/CodeGen/X86/fastcall-correct-mangling.ll
+index 00dc44e75e8f5..dd8ce0f0ef505 100644
+--- a/llvm/test/CodeGen/X86/fastcall-correct-mangling.ll
++++ b/llvm/test/CodeGen/X86/fastcall-correct-mangling.ll
+@@ -31,3 +31,7 @@ define private x86_fastcallcc void @dontCrash() {
+ ; CHECK64-LABEL: {{^}}.LdontCrash:
+   ret void
+ }
++
++@alias = alias void(i64, i8, i8, i16), void(i64, i8, i8, i16)* @func
++; CHECK32-LABEL: {{^}}.set @alias@20, @func@20
++; CHECK64-LABEL: {{^}}.set alias, func