[clang] [llvm] [ARM] support -mlong-calls -fPIC on arm32 #39970 (PR #147313)

[Eli Friedman via cfe-commits]

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@@ -173,6 +173,37 @@ class ARMTargetCodeGenInfo : public TargetCodeGenInfo {
       setBranchProtectionFnAttributes(BPI, (*Fn));
     }
 
+    if (FD) {
+      bool HasLongCalls = false, HasExecOnly = false;
+      if (Fn->hasFnAttribute("target-features")) {
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efriedma-quic wrote:

This is pretty complicated code to catch an edge case that won't come up in practice, and the backend will correctly diagnose.  I don't think it's necessary.

https://github.com/llvm/llvm-project/pull/147313