[lld] [lld] Error on unsupported split stack (PR #88063)

[Fangrui Song via llvm-commits]

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@@ -141,7 +141,7 @@ bool TargetInfo::needsThunk(RelExpr expr, RelType type, const InputFile *file,
 
 bool TargetInfo::adjustPrologueForCrossSplitStack(uint8_t *loc, uint8_t *end,
                                                   uint8_t stOther) const {
-  llvm_unreachable("Target doesn't support split stacks.");
+  fatal("Target doesn't support split stacks.");
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MaskRay wrote:

Lower-case and remove trailing period. See other diagnostic messages.

https://github.com/llvm/llvm-project/pull/88063