[llvm] [GlobalISel] Optimize ULEB128 usage (PR #90565)

[Jay Foad via llvm-commits]

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@@ -1593,7 +1594,7 @@ void MemoryAlignmentPredicateMatcher::emitPredicateOpcodes(
   Table << MatchTable::Opcode("GIM_CheckMemoryAlignment")
         << MatchTable::Comment("MI") << MatchTable::ULEB128Value(InsnVarID)
         << MatchTable::Comment("MMO") << MatchTable::ULEB128Value(MMOIdx)
-        << MatchTable::Comment("MinAlign") << MatchTable::ULEB128Value(MinAlign)
+        << MatchTable::Comment("MinAlign") << MatchTable::IntValue(1, MinAlign)
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jayfoad wrote:

Maybe assert `MinAlign < 256` somewhere? This is not log alignment, so it would break if some vector load instruction actually required 256-byte or greater alignment.

https://github.com/llvm/llvm-project/pull/90565