From 5c87b4958d1a5dabf2400be5b3a86aed4f82db91 Mon Sep 17 00:00:00 2001
From: Hans Wennborg <hans@hanshq.net>
Date: Wed, 9 May 2012 16:54:17 +0000
Subject: [PATCH] Introduce llvm-c function LLVMPrintModuleToFile.

This lets you save the textual representation of the LLVM IR to a file.
Before this patch it could only be printed to STDERR from llvm-c.

Patch by Carlo Kok!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156479 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm-c/Core.h |  9 +++++++++
 lib/VMCore/Core.cpp   | 19 +++++++++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/include/llvm-c/Core.h b/include/llvm-c/Core.h
index 77746069a25..87bf070a051 100644
--- a/include/llvm-c/Core.h
+++ b/include/llvm-c/Core.h
@@ -477,6 +477,15 @@ void LLVMSetTarget(LLVMModuleRef M, const char *Triple);
  */
 void LLVMDumpModule(LLVMModuleRef M);
 
+/**
+ * Print a representation of a module to a file. The ErrorMessage needs to be
+ * disposed with LLVMDisposeMessage. Returns 0 on success, 1 otherwise.
+ *
+ * @see Module::print()
+ */
+LLVMBool LLVMPrintModuleToFile(LLVMModuleRef M, const char *Filename,
+                               char **ErrorMessage);
+
 /**
  * Set inline assembly for a module.
  *
diff --git a/lib/VMCore/Core.cpp b/lib/VMCore/Core.cpp
index a9cca22d0dd..30d8a9b12f8 100644
--- a/lib/VMCore/Core.cpp
+++ b/lib/VMCore/Core.cpp
@@ -115,6 +115,25 @@ void LLVMDumpModule(LLVMModuleRef M) {
   unwrap(M)->dump();
 }
 
+LLVMBool LLVMPrintModuleToFile(LLVMModuleRef M, const char *Filename,
+                               char **ErrorMessage) {
+  std::string error;
+  raw_fd_ostream dest(Filename, error);
+  if (!error.empty()) {
+    *ErrorMessage = strdup(error.c_str());
+    return true;
+  }
+
+  unwrap(M)->print(dest, NULL);
+
+  if (!error.empty()) {
+    *ErrorMessage = strdup(error.c_str());
+    return true;
+  }
+  dest.flush();
+  return false;
+}
+
 /*--.. Operations on inline assembler ......................................--*/
 void LLVMSetModuleInlineAsm(LLVMModuleRef M, const char *Asm) {
   unwrap(M)->setModuleInlineAsm(StringRef(Asm));