[clang] [CIR] Add math and builtin intrinsics support (PR #175233)

[Andy Kaylor via cfe-commits]

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@@ -2196,7 +2197,44 @@ void CIRGenModule::setCIRFunctionAttributesForDefinition(
   } else if (codeGenOpts.getInlining() == CodeGenOptions::OnlyAlwaysInlining) {
     // If inlining is disabled, force everything that isn't always_inline
     // to carry an explicit noinline attribute.
+    // However, don't mark functions as noinline if they only contain
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andykaylor wrote:

I'm not following. What does `isConstant` have to do with `NoInline`?

https://github.com/llvm/llvm-project/pull/175233