================
@@ -0,0 +1,7 @@
+// RUN: %clang_cc1 -foverflow-behavior-types -std=c++11 -ast-print %s -o - |
FileCheck %s
+
+extern int __attribute__((overflow_behavior(no_wrap))) a;
+extern int __attribute__((overflow_behavior(wrap))) b;
+
+// CHECK: extern __no_wrap int a;
+// CHECK: extern __wrap int b;
----------------
JustinStitt wrote:
I am not inheriting from `AttributedType`. These overflow behavior types are
being turned directly into a canonical OBT.
```c
typedef int __attribute__((overflow_behavior(no_wrap))) nw_int;
...
`-TypedefDecl 0x55d0afc0d998 <line:4:1, col:57> col:57 nw_int 'int
__attribute__((overflow_behavior(no_wrap)))'
`-OverflowBehaviorType 0x55d0afc0d7b0 'int
__attribute__((overflow_behavior(no_wrap)))'
`-BuiltinType 0x55d0afba5000 'int'
```
Also, to get the argument (behavior kind) to appear I believe we need to do
this manually -- like what is done for
`TypePrinter::printBTFTagAttributedBefore()`. This let's me get
`overflow_behavior(no_wrap)` or `overflow_behavior(wrap)` printed out.
So to summarize, I'm not sure if I can re-use the `AttributedType` handling for
OBTs and even if we could, I'd still need to manually re-insert the behavior
kind.
https://github.com/llvm/llvm-project/pull/148914
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