[K/N] Do not inline runtime functions in case of armv7 darwin targets

^KT-51649 fixed

kotlin-native/konan/konan.properties

@@ -191,6 +191,7 @@ clangFlags.ios_arm32 = -cc1 -emit-obj -disable-llvm-optzns -x ir
 clangNooptFlags.ios_arm32 = -O1
 clangOptFlags.ios_arm32 = -O3
 clangDebugFlags.ios_arm32 = -O0
+llvmInlineThreshold.ios_arm32 = 50
 linkerNoDebugFlags.ios_arm32 = -S
 stripFlags.ios_arm32 = -S
 linkerDynamicFlags.ios_arm32 = -dylib
@@ -372,6 +373,7 @@ clangFlags.watchos_arm32 = -cc1 -emit-obj -disable-llvm-passes -x ir
 clangNooptFlags.watchos_arm32 = -O1
 clangOptFlags.watchos_arm32 = -O3
 clangDebugFlags.watchos_arm32 = -O0
+llvmInlineThreshold.watchos_arm32 = 50
 
 linkerKonanFlags.watchos_arm32 = -lSystem -lc++ -lobjc -framework Foundation -sdk_version 8.0
 linkerOptimizationFlags.watchos_arm32 = -dead_strip

kotlin-native/runtime/src/legacymm/cpp/Memory.cpp

@@ -3767,19 +3767,19 @@ void CheckGlobalsAccessible() {
         ThrowIncorrectDereferenceException();
 }
 
-ALWAYS_INLINE RUNTIME_NOTHROW void Kotlin_mm_switchThreadStateNative() {
+CODEGEN_INLINE_POLICY RUNTIME_NOTHROW void Kotlin_mm_switchThreadStateNative() {
     // no-op, used by the new MM only.
 }
 
-ALWAYS_INLINE RUNTIME_NOTHROW void Kotlin_mm_switchThreadStateRunnable() {
+CODEGEN_INLINE_POLICY RUNTIME_NOTHROW void Kotlin_mm_switchThreadStateRunnable() {
     // no-op, used by the new MM only.
 }
 
-ALWAYS_INLINE RUNTIME_NOTHROW void Kotlin_mm_safePointFunctionPrologue() {
+CODEGEN_INLINE_POLICY RUNTIME_NOTHROW void Kotlin_mm_safePointFunctionPrologue() {
     // no-op, used by the new MM only.
 }
 
-ALWAYS_INLINE RUNTIME_NOTHROW void Kotlin_mm_safePointWhileLoopBody() {
+CODEGEN_INLINE_POLICY RUNTIME_NOTHROW void Kotlin_mm_safePointWhileLoopBody() {
     // no-op, used by the new MM only.
 }
 

kotlin-native/runtime/src/main/cpp/Common.h

@@ -25,7 +25,15 @@
 #define RUNTIME_WEAK __attribute__((weak))
 #define RUNTIME_NODEBUG __attribute__((nodebug))
 
-#define ALWAYS_INLINE __attribute__((always_inline))
+#if KONAN_ARM32 && (KONAN_IOS || KONAN_WATCHOS)
+  // On the one hand, ALWAYS_INLINE forces many performance-critical function to be, well,
+  // inlined. Which is good for performance, of course.
+  // On the other hand, 32-bit Mach-O object files can't be really big.
+  // As a compromise, we let the compiler decide what should be inlined or not.
+  #define ALWAYS_INLINE
+#else
+  #define ALWAYS_INLINE __attribute__((always_inline))
+#endif
 #define NO_INLINE __attribute__((noinline))
 
 #define NO_EXTERNAL_CALLS_CHECK __attribute__((annotate("no_external_calls_check")))

kotlin-native/runtime/src/main/cpp/Memory.h

@@ -26,6 +26,14 @@
 #include "PointerBits.h"
 #include "Utils.hpp"
 
+#if KONAN_ARM32 && (KONAN_IOS || KONAN_WATCHOS)
+  // Currently, codegen places a lot of unnecessary calls to MM functions.
+  // By forcing NO_INLINE on these functions we keep binaries from growing too big.
+  #define CODEGEN_INLINE_POLICY NO_INLINE
+#else
+  #define CODEGEN_INLINE_POLICY ALWAYS_INLINE
+#endif
+
 typedef enum {
   // Must match to permTag() in Kotlin.
   OBJECT_TAG_PERMANENT_CONTAINER = 1 << 0,
@@ -327,13 +335,13 @@ void AdoptReferenceFromSharedVariable(ObjHeader* object);
 void CheckGlobalsAccessible();
 
 // Sets state of the current thread to NATIVE (used by the new MM).
-ALWAYS_INLINE RUNTIME_NOTHROW void Kotlin_mm_switchThreadStateNative();
+CODEGEN_INLINE_POLICY RUNTIME_NOTHROW void Kotlin_mm_switchThreadStateNative();
 // Sets state of the current thread to RUNNABLE (used by the new MM).
-ALWAYS_INLINE RUNTIME_NOTHROW void Kotlin_mm_switchThreadStateRunnable();
+CODEGEN_INLINE_POLICY RUNTIME_NOTHROW void Kotlin_mm_switchThreadStateRunnable();
 
 // Safe point callbacks from Kotlin code generator.
-void Kotlin_mm_safePointFunctionPrologue() RUNTIME_NOTHROW;
+CODEGEN_INLINE_POLICY void Kotlin_mm_safePointFunctionPrologue() RUNTIME_NOTHROW;
-void Kotlin_mm_safePointWhileLoopBody() RUNTIME_NOTHROW;
+CODEGEN_INLINE_POLICY void Kotlin_mm_safePointWhileLoopBody() RUNTIME_NOTHROW;
 
 #ifdef __cplusplus
 }

kotlin-native/runtime/src/mm/cpp/Memory.cpp

@@ -568,23 +568,23 @@ extern "C" void CheckGlobalsAccessible() {
     // Always accessible
 }
 
-extern "C" RUNTIME_NOTHROW ALWAYS_INLINE void Kotlin_mm_safePointFunctionPrologue() {
+extern "C" RUNTIME_NOTHROW CODEGEN_INLINE_POLICY void Kotlin_mm_safePointFunctionPrologue() {
     auto* threadData = mm::ThreadRegistry::Instance().CurrentThreadData();
     AssertThreadState(threadData, ThreadState::kRunnable);
     threadData->gc().SafePointFunctionPrologue();
 }
 
-extern "C" RUNTIME_NOTHROW ALWAYS_INLINE void Kotlin_mm_safePointWhileLoopBody() {
+extern "C" RUNTIME_NOTHROW CODEGEN_INLINE_POLICY void Kotlin_mm_safePointWhileLoopBody() {
     auto* threadData = mm::ThreadRegistry::Instance().CurrentThreadData();
     AssertThreadState(threadData, ThreadState::kRunnable);
     threadData->gc().SafePointLoopBody();
 }
 
-extern "C" ALWAYS_INLINE RUNTIME_NOTHROW void Kotlin_mm_switchThreadStateNative() {
+extern "C" CODEGEN_INLINE_POLICY RUNTIME_NOTHROW void Kotlin_mm_switchThreadStateNative() {
     SwitchThreadState(mm::ThreadRegistry::Instance().CurrentThreadData(), ThreadState::kNative);
 }
 
-extern "C" ALWAYS_INLINE RUNTIME_NOTHROW void Kotlin_mm_switchThreadStateRunnable() {
+extern "C" CODEGEN_INLINE_POLICY RUNTIME_NOTHROW void Kotlin_mm_switchThreadStateRunnable() {
     SwitchThreadState(mm::ThreadRegistry::Instance().CurrentThreadData(), ThreadState::kRunnable);
 }