From 567962d22090bbd23c1c3dc0e04229ac8c681ea8 Mon Sep 17 00:00:00 2001
From: Simon Heath <icefox@dreamquest.io>
Date: Wed, 23 Oct 2019 09:08:26 -0400
Subject: Add FFI bindings for Module::getInstructionCount()

Just to make it useable for profiling and such inside
rustc itself.  It was vaguely useful in
https://wiki.alopex.li/WhereRustcSpendsItsTime and I figured
I might as well upstream it; I may or may not ever get around
to doing more with it (hopefully I will), but it may be useful
for others.
---
 src/rustllvm/RustWrapper.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'src/rustllvm/RustWrapper.cpp')

diff --git a/src/rustllvm/RustWrapper.cpp b/src/rustllvm/RustWrapper.cpp
index 16d08ee534e..e6c45b8e362 100644
--- a/src/rustllvm/RustWrapper.cpp
+++ b/src/rustllvm/RustWrapper.cpp
@@ -87,6 +87,14 @@ extern "C" char *LLVMRustGetLastError(void) {
   return Ret;
 }
 
+extern "C" unsigned int LLVMRustGetInstructionCount(LLVMModuleRef M) {
+#if LLVM_VERSION_GE(7, 0)
+  return unwrap(M)->getInstructionCount();
+#else
+  report_fatal_error("Module::getInstructionCount not available before LLVM 7");
+#endif
+}
+
 extern "C" void LLVMRustSetLastError(const char *Err) {
   free((void *)LastError);
   LastError = strdup(Err);
-- 
cgit 1.4.1-3-g733a5