[llvm] [BranchRelaxation] Remove quadratic behavior in relaxation pass (PR #96250)

[Mingming Liu via llvm-commits]

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@@ -718,6 +734,13 @@ bool BranchRelaxation::relaxBranchInstructions() {
     }
   }
 
+  // If we relaxed a branch, subsequent block offsets may be underestimated.
+  // Recompute them to guarantee that we relax any branches that we pushed out
+  // of range.
+  if (Changed) {
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minglotus-6 wrote:

nittest nit: remove braces here per https://llvm.org/docs/CodingStandards.html#don-t-use-braces-on-simple-single-statement-bodies-of-if-else-loop-statements

https://github.com/llvm/llvm-project/pull/96250