[OCaml] PR19859: Add Llvm.{fcmp_predicate,float_of_const}.
[oota-llvm.git] / bindings / ocaml / irreader / irreader_ocaml.c
1 /*===-- irreader_ocaml.c - LLVM OCaml Glue ----------------------*- C++ -*-===*\
2 |*                                                                            *|
3 |*                     The LLVM Compiler Infrastructure                       *|
4 |*                                                                            *|
5 |* This file is distributed under the University of Illinois Open Source      *|
6 |* License. See LICENSE.TXT for details.                                      *|
7 |*                                                                            *|
8 |*===----------------------------------------------------------------------===*|
9 |*                                                                            *|
10 |* This file glues LLVM's OCaml interface to its C interface. These functions *|
11 |* are by and large transparent wrappers to the corresponding C functions.    *|
12 |*                                                                            *|
13 \*===----------------------------------------------------------------------===*/
14
15 #include "llvm-c/IRReader.h"
16 #include "caml/alloc.h"
17 #include "caml/fail.h"
18 #include "caml/memory.h"
19
20 /* Can't use the recommended caml_named_value mechanism for backwards
21    compatibility reasons. This is largely equivalent. */
22 static value llvm_irreader_error_exn;
23
24 CAMLprim value llvm_register_irreader_exns(value Error) {
25   llvm_irreader_error_exn = Field(Error, 0);
26   register_global_root(&llvm_irreader_error_exn);
27   return Val_unit;
28 }
29
30 static void llvm_raise(value Prototype, char *Message) {
31   CAMLparam1(Prototype);
32   CAMLlocal1(CamlMessage);
33
34   CamlMessage = copy_string(Message);
35   LLVMDisposeMessage(Message);
36
37   raise_with_arg(Prototype, CamlMessage);
38   abort(); /* NOTREACHED */
39 #ifdef CAMLnoreturn
40   CAMLnoreturn; /* Silences warnings, but is missing in some versions. */
41 #endif
42 }
43
44
45 /*===-- Modules -----------------------------------------------------------===*/
46
47 /* Llvm.llcontext -> Llvm.llmemorybuffer -> Llvm.llmodule */
48 CAMLprim value llvm_parse_ir(LLVMContextRef C,
49                              LLVMMemoryBufferRef MemBuf) {
50   CAMLparam0();
51   CAMLlocal2(Variant, MessageVal);
52   LLVMModuleRef M;
53   char *Message;
54
55   if (LLVMParseIRInContext(C, MemBuf, &M, &Message))
56     llvm_raise(llvm_irreader_error_exn, Message);
57
58   CAMLreturn((value) M);
59 }