[PATCH] D57270: [ObjC] Fix non-canonical types preventing type arguments substitution.

[Volodymyr Sapsai via Phabricator via cfe-commits]

vsapsai created this revision.
vsapsai added reviewers: ahatanak, erik.pilkington.
Herald added subscribers: dexonsmith, jkorous.

`QualType::substObjCTypeArgs` doesn't go past non-canonical types and as
the result misses some of the substitutions like `ObjCTypeParamType`.

Update `SimpleTransformVisitor` to traverse past the type sugar.


https://reviews.llvm.org/D57270

Files:
  clang/lib/AST/Type.cpp
  clang/test/SemaObjC/parameterized_classes_subst.m

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