[K/N] Add LLVM C wrappers for -time-passes API.

kotlin-native/libllvmext/src/main/cpp/CAPIExtensions.cpp

@@ -11,6 +11,7 @@
 #include <llvm/Transforms/ObjCARC.h>
 #include <llvm/Transforms/Utils/Cloning.h>
 #include <llvm/Transforms/Instrumentation/ThreadSanitizer.h>
+#include <llvm/Support/Timer.h>
 
 using namespace llvm;
 
@@ -58,3 +59,15 @@ int LLVMInlineCall(LLVMValueRef call) {
 void LLVMAddThreadSanitizerPass(LLVMPassManagerRef PM) {
   unwrap(PM)->add(createThreadSanitizerLegacyPassPass());
 }
+
+void LLVMSetTimePasses(int enabled) {
+    llvm::TimePassesIsEnabled = static_cast<bool>(enabled);
+}
+
+void LLVMPrintAllTimersToStdOut() {
+    llvm::TimerGroup::printAll(llvm::outs());
+}
+
+void LLVMClearAllTimers() {
+    llvm::TimerGroup::clearAll();
+}

kotlin-native/libllvmext/src/main/include/CAPIExtensions.h

@@ -27,6 +27,15 @@ int LLVMInlineCall(LLVMValueRef call);
 
 void LLVMAddThreadSanitizerPass(LLVMPassManagerRef PM);
 
+/// Control LLVM -time-passes flag.
+void LLVMSetTimePasses(int enabled);
+
+/// Print timing results. Useful in combination with LLVMSetTimePasses.
+void LLVMPrintAllTimersToStdOut();
+
+/// Clear all LLVM timers. Allows avoiding automatic printing on shutdown
+void LLVMClearAllTimers();
+
 # ifdef __cplusplus
 }
 # endif