[clang] [Clang] Implement P2809: Trivial infinite loops are not Undefined Behavior (PR #90066)

[Erich Keane via cfe-commits]

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@@ -908,6 +908,73 @@ void CodeGenFunction::EmitIfStmt(const IfStmt &S) {
     incrementProfileCounter(&S);
 }
 
+bool CodeGenFunction::checkIfLoopMustProgress(const Expr 
*ControllingExpression,
+                                              bool IsTrivialCXXLoop) {
+  if (CGM.getCodeGenOpts().getFiniteLoops() ==
----------------
erichkeane wrote:

Hrm... I see this is exsting code, but this confuses me/is reverse from what I 
thought.  

https://github.com/llvm/llvm-project/pull/90066
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