[lld] [LLD] Implement --enable-non-contiguous-regions (PR #90007)

[Daniel Thornburgh via llvm-commits]

================
@@ -1066,8 +1126,16 @@ void LinkerScript::assignOffsets(OutputSection *sec) {
     // Handle a single input section description command.
     // It calculates and assigns the offsets for each section and also
     // updates the output section size.
-    for (InputSection *isec : cast<InputSectionDescription>(cmd)->sections) {
+
+    DenseSet<InputSection *> spills;
+    auto &sections = cast<InputSectionDescription>(cmd)->sections;
+    for (InputSection *isec : sections) {
       assert(isec->getParent() == sec);
+
+      // Skip all possible spills.
----------------
mysterymath wrote:

Done.

https://github.com/llvm/llvm-project/pull/90007