Exposing MCJIT through C API

Re-submitting with fix for OCaml dependency problems (removing dependency on SectionMemoryManager when it isn't used).

Patch by Fili Pizlo

llvm-svn: 180720

1 files changed, 28 insertions, 0 deletions

diff --git a/llvm/include/llvm-c/ExecutionEngine.h b/llvm/include/llvm-c/ExecutionEngine.h
index be763312d22..8b654d5a5ca 100644
--- a/llvm/include/llvm-c/ExecutionEngine.h
+++ b/llvm/include/llvm-c/ExecutionEngine.h
@@ -34,11 +34,17 @@ extern "C" {
  */
 
 void LLVMLinkInJIT(void);
+void LLVMLinkInMCJIT(void);
 void LLVMLinkInInterpreter(void);
 
 typedef struct LLVMOpaqueGenericValue *LLVMGenericValueRef;
 typedef struct LLVMOpaqueExecutionEngine *LLVMExecutionEngineRef;
 
+struct LLVMMCJITCompilerOptions {
+  unsigned OptLevel;
+  LLVMBool NoFramePointerElim;
+};
+
 /*===-- Operations on generic values --------------------------------------===*/
 
 LLVMGenericValueRef LLVMCreateGenericValueOfInt(LLVMTypeRef Ty,
@@ -75,6 +81,28 @@ LLVMBool LLVMCreateJITCompilerForModule(LLVMExecutionEngineRef *OutJIT,
                                         unsigned OptLevel,
                                         char **OutError);
 
+/**
+ * Create an MCJIT execution engine for a module, with the given options. It is
+ * the responsibility of the caller to ensure that all fields in Options up to
+ * the given SizeOfOptions are initialized. It is correct to pass a smaller value
+ * of SizeOfOptions that omits some fields, and it is also correct to set any
+ * field to zero. The canonical way of using this is:
+ *
+ * LLVMMCJITCompilerOptions options;
+ * memset(&options, 0, sizeof(options));
+ * ... fill in those options you care about
+ * LLVMCreateMCJITCompilerForModule(&jit, mod, &options, sizeof(options), &error);
+ *
+ * Note that this is also correct, though possibly suboptimal:
+ *
+ * LLVMCreateMCJITCompilerForModule(&jit, mod, 0, 0, &error);
+ */
+LLVMBool LLVMCreateMCJITCompilerForModule(LLVMExecutionEngineRef *OutJIT,
+                                          LLVMModuleRef M,
+                                          struct LLVMMCJITCompilerOptions *Options,
+                                          size_t SizeOfOptions,
+                                          char **OutError);
+
 /** Deprecated: Use LLVMCreateExecutionEngineForModule instead. */
 LLVMBool LLVMCreateExecutionEngine(LLVMExecutionEngineRef *OutEE,
                                    LLVMModuleProviderRef MP,