[llvm] [llvm] Remove `br i1 undef` from regression tests (PR #117292)

[Nuno Lopes via llvm-commits]

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@@ -51,10 +47,10 @@ for.cond1thread-pre-split:                        ; preds = %entry
   br label %for.end4.split
 
 for.end4.split:                                   ; preds = %for.cond1thread-pre-split
-  br i1 %tobool, label %for.cond6.preheader, label %if.end11
+  br i1 true, label %for.cond6.preheader, label %if.end11
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nunoplopes wrote:

replace this true

https://github.com/llvm/llvm-project/pull/117292