[clang] [llvm] [IR] Don't set strictfp on irrelevant calls (PR #122735)

[Eli Friedman via cfe-commits]

================
@@ -66,6 +66,12 @@ bool IntrinsicInst::mayLowerToFunctionCall(Intrinsic::ID 
IID) {
   }
 }
 
+bool IntrinsicInst::canAccessFPEnvironment(LLVMContext &C, Intrinsic::ID IID) {
+  AttributeList Attrs = Intrinsic::getAttributes(C, IID);
+  MemoryEffects ME = Attrs.getMemoryEffects();
+  return ME.onlyAccessesInaccessibleMem();
----------------
efriedma-quic wrote:

I think you want doesAccessInaccessibleMem() (any function that can access 
inaccessible memory, not just functions which only access inaccessible memory). 
Which apparently doesn't exist at the moment, but should be straightforward to 
implement.

https://github.com/llvm/llvm-project/pull/122735
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