[lld] [lld-macho] Fix branch extension thunk estimation logic (PR #120529)

[Ellis Hoag via llvm-commits]

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@@ -184,15 +184,42 @@ uint64_t TextOutputSection::estimateStubsInRangeVA(size_t callIdx) const {
     InputSection *isec = inputs[i];
     isecEnd = alignToPowerOf2(isecEnd, isec->align) + isec->getSize();
   }
+
+  // Tally up any thunks that have already been placed that have address higher
+  // than the equivalent callIdx. We first find the index of the first thunk
+  // that is beyond the current inputs[callIdx].
+  auto itPostcallIdxThunks = std::partition_point(
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ellishg wrote:

I think we can use llvm::partition_point()

https://github.com/llvm/llvm-project/pull/120529