[llvm] [GlobalISel] Change MatchTable entries to 1 byte each (PR #74429)

[Wang Pengcheng via llvm-commits]

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@@ -1354,8 +1385,8 @@ bool GIMatchTableExecutor::executeMatchTable(
     }
 
     case GIR_MakeTempReg: {
-      int64_t TempRegID = MatchTable[CurrentIdx++];
-      int64_t TypeID = MatchTable[CurrentIdx++];
+      uint64_t TempRegID = nextULEB128();
+      int64_t TypeID = (int8_t)MatchTable[CurrentIdx++];
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wangpc-pp wrote:

This casting is weird.

https://github.com/llvm/llvm-project/pull/74429