Add file containing extensions of the LLVM C API.

Author: Andres Freund
Discussion: https://postgr.es/m/20170901064131.tazjxwus3k2w3ybh@alap3.anarazel.de

1 files changed, 44 insertions, 0 deletions

diff --git a/src/backend/jit/llvm/llvmjit_wrap.cpp b/src/backend/jit/llvm/llvmjit_wrap.cpp
new file mode 100644
index 00000000000..5d1a17cde04
--- /dev/null
+++ b/src/backend/jit/llvm/llvmjit_wrap.cpp
@@ -0,0 +1,44 @@
+/*-------------------------------------------------------------------------
+ *
+ * llvmjit_wrap.cpp
+ *	  Parts of the LLVM interface not (yet) exposed to C.
+ *
+ * Copyright (c) 2016-2018, PostgreSQL Global Development Group
+ *
+ * IDENTIFICATION
+ *	  src/backend/lib/llvm/llvmjit_wrap.c
+ *
+ *-------------------------------------------------------------------------
+ */
+
+extern "C"
+{
+#include "postgres.h"
+}
+
+#include <llvm/MC/SubtargetFeature.h>
+#include <llvm/Support/Host.h>
+
+#include "jit/llvmjit.h"
+
+
+/*
+ * C-API extensions.
+ */
+#if defined(HAVE_DECL_LLVMGETHOSTCPUNAME) && !HAVE_DECL_LLVMGETHOSTCPUNAME
+char *LLVMGetHostCPUName(void) {
+	return strdup(llvm::sys::getHostCPUName().data());
+}
+#endif
+
+
+char *LLVMGetHostCPUFeatures(void) {
+	llvm::SubtargetFeatures Features;
+	llvm::StringMap<bool> HostFeatures;
+
+	if (llvm::sys::getHostCPUFeatures(HostFeatures))
+		for (auto &F : HostFeatures)
+			Features.AddFeature(F.first(), F.second);
+
+	return strdup(Features.getString().c_str());
+}