https://bugs.llvm.org/show_bug.cgi?id=51638
Bug ID: 51638
Summary: C API, LLVMGetIntrinsicDeclaration crash trying to get
‘llvm.get.dynamic.area.offset’
Product: libraries
Version: 11.0
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Support Libraries
Assignee: unassignedb...@nondot.org
Reporter: b2.t...@gmx.com
CC: llvm-bugs@lists.llvm.org
The documentation says LLVMGetIntrinsicDeclaration
> Create or insert the declaration of an intrinsic. For overloaded intrinsics,
> parameter types must be provided to uniquely identify an overload.
But "llvm.get.dynamic.area.offset.i64" does not have parameter, so
by the doc it looks like that it can be retrieved using something like
```
auto id = LLVMLookupIntrinsicID(str, strlen(str));
auto str = "llvm.get.dynamic.area.offset.i64";
auto f = LLVMGetIntrinsicDeclaration(mod, id, null, 0);
```
which crashes LLVM:
> DecodeFixedType(llvm::ArrayRef<llvm::Intrinsic::IITDescriptor>&,
> llvm::ArrayRef<llvm::Type*>, llvm::LLVMContext&) [clone .isra.0]
>
> llvm::Intrinsic::getType(llvm::LLVMContext&, unsigned int,
> llvm::ArrayRef<llvm::Type*>)
>
> llvm::Intrinsic::getDeclaration(llvm::Module*, unsigned int, >
> llvm::ArrayRef<llvm::Type*>)
however passing the return type so `LLVMInt64Type()` type instead of null and
then `1` as parameter count works fine.
This is strange since the suffix of the string used to identify the instrinsic
should give the return type.
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