[llvm] MC: Simplify fragment reuse determination (PR #149471)

[Sam Elliott via llvm-commits]

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@@ -9,6 +9,7 @@
 # CHECK-NEXT:0 Data LinkerRelaxable Size:8 [97,00,00,00,e7,80,00,00]
 # CHECK-NEXT:  Fixup @0 Value:specifier(19,ext) Kind:4023
 # CHECK-NEXT:  Symbol @0 $x
+# CHECK-NEXT:8 Data Size:0 []
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lenary wrote:

Wasn't the idea of this patch sequence to cut down on zero-sized data fragments? Is there something we can do here to get rid of this one?

https://github.com/llvm/llvm-project/pull/149471