[llvm] [LoongArch] Support R_LARCH_{ADD, SUB}_ULEB128 for .uleb128 and force relocs when sym is not in section (PR #76433)

[Fangrui Song via llvm-commits]

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@@ -202,9 +217,27 @@ getRelocPairForSize(unsigned Size) {
     return std::make_pair(
         MCFixupKind(FirstLiteralRelocationKind + ELF::R_LARCH_ADD64),
         MCFixupKind(FirstLiteralRelocationKind + ELF::R_LARCH_SUB64));
+  case 128:
+    return std::make_pair(
+        MCFixupKind(FirstLiteralRelocationKind + ELF::R_LARCH_ADD_ULEB128),
+        MCFixupKind(FirstLiteralRelocationKind + ELF::R_LARCH_SUB_ULEB128));
   }
 }
 
+bool LoongArchAsmBackend::relaxLEB128(MCLEBFragment &LF, MCAsmLayout &Layout,
+                                      int64_t &Value, bool &UseZeroPad) const {
+  const MCExpr &Expr = LF.getValue();
+
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MaskRay wrote:

delete blank line

https://github.com/llvm/llvm-project/pull/76433