[llvm] [TableGen] New tblgen Pattern bit to disable GISel pattern imports (PR #88382)

[via llvm-commits]

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@@ -1979,6 +1979,7 @@ class Pattern<dag patternToMatch, list<dag> resultInstrs> {
   list<dag>       ResultInstrs    = resultInstrs;
   list<Predicate> Predicates      = [];  // See class Instruction in Target.td.
   int             AddedComplexity = 0;   // See class Instruction in Target.td.
+  bit           GISelShouldIgnore = 0;
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jofrn wrote:

It is aligned around the '=', rather than shifting everyone over.

https://github.com/llvm/llvm-project/pull/88382