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

2 files changed, 28 insertions, 0 deletions

diff --git a/include/llvm-c/Core.h b/include/llvm-c/Core.h
index 7774606..87bf070 100644
--- a/include/llvm-c/Core.h
+++ b/include/llvm-c/Core.h
@@ -478,6 +478,15 @@ 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.
  *
  * @see Module::setModuleInlineAsm()
diff --git a/lib/VMCore/Core.cpp b/lib/VMCore/Core.cpp
index a9cca22..30d8a9b 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));