source: parabix-LLVM/llvm_git/bindings/ocaml/bitreader/bitreader_ocaml.c @ 4078

Last change on this file since 4078 was 4078, checked in by linmengl, 5 years ago

checkin llvm-meng source

File size: 2.7 KB
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1/*===-- bitwriter_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/BitReader.h"
16#include "caml/alloc.h"
17#include "caml/fail.h"
18#include "caml/memory.h"
19
20
21/* Can't use the recommended caml_named_value mechanism for backwards
22   compatibility reasons. This is largely equivalent. */
23static value llvm_bitreader_error_exn;
24
25CAMLprim value llvm_register_bitreader_exns(value Error) {
26  llvm_bitreader_error_exn = Field(Error, 0);
27  register_global_root(&llvm_bitreader_error_exn);
28  return Val_unit;
29}
30
31static void llvm_raise(value Prototype, char *Message) {
32  CAMLparam1(Prototype);
33  CAMLlocal1(CamlMessage);
34 
35  CamlMessage = copy_string(Message);
36  LLVMDisposeMessage(Message);
37 
38  raise_with_arg(Prototype, CamlMessage);
39  abort(); /* NOTREACHED */
40#ifdef CAMLnoreturn
41  CAMLnoreturn; /* Silences warnings, but is missing in some versions. */
42#endif
43}
44
45
46/*===-- Modules -----------------------------------------------------------===*/
47
48/* Llvm.llcontext -> Llvm.llmemorybuffer -> Llvm.llmodule */
49CAMLprim value llvm_get_module(LLVMContextRef C, LLVMMemoryBufferRef MemBuf) {
50  CAMLparam0();
51  CAMLlocal2(Variant, MessageVal);
52  char *Message;
53 
54  LLVMModuleRef M;
55  if (LLVMGetBitcodeModuleInContext(C, MemBuf, &M, &Message))
56    llvm_raise(llvm_bitreader_error_exn, Message);
57 
58  CAMLreturn((value) M);
59}
60
61/* Llvm.llcontext -> Llvm.llmemorybuffer -> Llvm.llmodule */
62CAMLprim value llvm_parse_bitcode(LLVMContextRef C,
63                                  LLVMMemoryBufferRef MemBuf) {
64  CAMLparam0();
65  CAMLlocal2(Variant, MessageVal);
66  LLVMModuleRef M;
67  char *Message;
68 
69  if (LLVMParseBitcodeInContext(C, MemBuf, &M, &Message))
70    llvm_raise(llvm_bitreader_error_exn, Message);
71 
72  CAMLreturn((value) M);
73}
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