[llvm] MC: Merge MCFragment.h into MCSection.h (PR #146315)

[Alexis Engelke via llvm-commits]

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@@ -30,9 +33,97 @@ class MCContext;
 class MCExpr;
 class MCObjectStreamer;
 class MCSymbol;
+class MCSection;
+class MCSubtargetInfo;
 class raw_ostream;
 class Triple;
 
+// Represents a contiguous piece of code or data within a section. Its size is
+// determined by MCAssembler::layout. All subclasses (except
+// MCRelaxableFragment, which stores a MCInst) must have trivial destructors.
+//
+// MCSection's inline functions may access MCFragment members.
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aengelke wrote:

My bad, sorry.

https://github.com/llvm/llvm-project/pull/146315