[llvm] [LV][NFC] Emit remarks when failing to vectorise early exit loops (PR #225078)

[David Sherwood via llvm-commits]

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@@ -3192,8 +3212,12 @@ static bool handleUncountableExitsWithSideEffects(
   SmallVector<VPInstruction *, 8> ConditionRecipes;
 
   VPValue *Cond = getRecipesForUncountableExit(ConditionRecipes, LatchVPBB);
-  if (!Cond)
+  if (!Cond) {
+    reportVectorizationFailure("Unable to determine early exit condition for "
+                               "loop with side effects.\n",
+                               "EarlyExitSideEffectsCond", ORE, TheLoop);
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david-arm wrote:

I'm not sure what you mean. The interface only takes an extra optional `Instruction *` and it prints out the instruction itself, not the debug output.

https://github.com/llvm/llvm-project/pull/225078