[llvm] [IR] Replace of PointerType::getUnqual(Type) with opaque version (NFC) (PR #123909)

[Nikita Popov via llvm-commits]

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@@ -149,8 +149,7 @@ void BrainF::header(LLVMContext& C) {
 
     //declare i32 @puts(i8 *)
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nikic wrote:

As a followup, this code could use same larger cleanup to use opaque pointers in the comments and remove some unnecessary stuff like the zero-offset GEP below.

https://github.com/llvm/llvm-project/pull/123909