[clang] [clang] Enable descriptions for --print-supported-extensions (PR #66715)

[David Spickett via cfe-commits]

================
@@ -600,11 +601,17 @@ StringRef ARM::getARMCPUForArch(const llvm::Triple 
&Triple, StringRef MArch) {
   llvm_unreachable("invalid arch name");
 }
 
-void ARM::PrintSupportedExtensions() {
+void ARM::PrintSupportedExtensions(std::map<StringRef, StringRef> llvmDescMap) 
{
   outs() << "All available -march extensions for ARM\n\n";
   for (const auto &Ext : ARCHExtNames) {
     // Extensions without a feature cannot be used with -march.
-    if (!Ext.Feature.empty())
-      outs() << '\t' << Ext.Name << "\n";
+    if (!Ext.Feature.empty()) {
----------------
DavidSpickett wrote:

https://llvm.org/docs/CodingStandards.html#use-early-exits-and-continue-to-simplify-code

https://github.com/llvm/llvm-project/pull/66715
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