[LLVMdev] Pointer to String Constant

[Nyx]

I'm writing a C compiler in OCaml and I've run into a small problem. I wrote
the following piece of code to generate a pointer to a string constant, so I
could compile C expressions of the form "const char* p = "test\n";" :

let strval = const_stringz codecontext v in
dump_value strval;
dump_value i32_zero;
const_gep strval [| i32_zero; i32_zero |]

The dump statements I put confirm that the string array and the index values
have the types I would expect:

[6 x i8] c"test\0A\00"
i32 0

However, the code still seems to break an assertion:

Constants.cpp:1487: static llvm::Constant*
llvm::ConstantExpr::getGetElementPtr(llvm::Constant*, llvm::Value* const*,
unsigned int): Assertion `Ty && "GEP indices invalid!"' failed.
Aborted

Could someone tell me what I'm doing wrong here?
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