[llvm] Add debug location to strlen in LoopIdiomRecognize pass (PR #140164)

[Amy Huang via llvm-commits]

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@@ -1778,6 +1778,9 @@ bool LoopIdiomRecognize::recognizeAndInsertStrLen() {
   }
   assert(StrLenFunc && "Failed to emit strlen function.");
 
+  // Set debug location to the start of the loop.
+  cast<Instruction>(StrLenFunc)->setDebugLoc(CurLoop->getStartLoc());
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amykhuang wrote:

Changed to set the debug location on the IRbuilder.

https://github.com/llvm/llvm-project/pull/140164