1 files changed, 26 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/LibcallLoweringInfo.cpp b/llvm/lib/CodeGen/LibcallLoweringInfo.cpp
new file mode 100644
index 0000000..5c1698c
--- /dev/null
+++ b/llvm/lib/CodeGen/LibcallLoweringInfo.cpp
@@ -0,0 +1,26 @@
+//===- LibcallLoweringInfo.cpp - Interface for runtime libcalls -----------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/CodeGen/LibcallLoweringInfo.h"
+
+using namespace llvm;
+
+LibcallLoweringInfo::LibcallLoweringInfo(
+    const RTLIB::RuntimeLibcallsInfo &RTLCI)
+    : RTLCI(RTLCI) {
+  // TODO: This should be generated with lowering predicates, and assert the
+  // call is available.
+  for (RTLIB::LibcallImpl Impl : RTLIB::libcall_impls()) {
+    if (RTLCI.isAvailable(Impl)) {
+      RTLIB::Libcall LC = RTLIB::RuntimeLibcallsInfo::getLibcallFromImpl(Impl);
+      // FIXME: Hack, assume the first available libcall wins.
+      if (LibcallImpls[LC] == RTLIB::Unsupported)
+        LibcallImpls[LC] = Impl;
+    }
+  }
+}