[llvm] Use generic CPU tuning when in doubt (PR #83631)

[via llvm-commits]

https://github.com/AtariDreams updated https://github.com/llvm/llvm-project/pull/83631

>From 655cfd33c2ab06db0cc45d0aaad288812f1ce4d2 Mon Sep 17 00:00:00 2001
From: Rose <83477269+AtariDreams at users.noreply.github.com>
Date: Fri, 1 Mar 2024 17:52:58 -0500
Subject: [PATCH] Use generic CPU tuning when in doubt

---
 llvm/lib/Target/X86/X86Subtarget.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/llvm/lib/Target/X86/X86Subtarget.cpp b/llvm/lib/Target/X86/X86Subtarget.cpp
index 07f535685e8f97..0c263a2e9c3dd8 100644
--- a/llvm/lib/Target/X86/X86Subtarget.cpp
+++ b/llvm/lib/Target/X86/X86Subtarget.cpp
@@ -252,7 +252,7 @@ void X86Subtarget::initSubtargetFeatures(StringRef CPU, StringRef TuneCPU,
     CPU = "generic";
 
   if (TuneCPU.empty())
-    TuneCPU = "i586"; // FIXME: "generic" is more modern than llc tests expect.
+    TuneCPU = "generic";
 
   std::string FullFS = X86_MC::ParseX86Triple(TargetTriple);
   assert(!FullFS.empty() && "Failed to parse X86 triple");