Bug 1150654 - Add CantInlineNoSpecialization to distinguish natives for which there is no Ion specialization. (r=jandem)

js/public/TrackedOptimizationInfo.h

@@ -125,6 +125,7 @@ namespace JS {
     _(CantInlineNativeBadType)                                          \
     _(CantInlineNativeNoTemplateObj)                                    \
     _(CantInlineBound)                                                  \
+    _(CantInlineNativeNoSpecialization)                                 \
                                                                         \
     _(GenericSuccess)                                                   \
     _(Inlined)                                                          \

js/src/jit/MCallOptimize.cpp

@@ -398,6 +398,10 @@ IonBuilder::inlineNativeCall(CallInfo& callInfo, JSFunction* target)
     if (native == js::simd_float32x4_storeXYZ)
         return inlineSimdStore(callInfo, native, SimdTypeDescr::Float32x4, 3);
 
+    // Reaching here means we tried to inline a native for which there is no
+    // Ion specialization.
+    trackOptimizationOutcome(TrackedOutcome::CantInlineNativeNoSpecialization);
+
     return InliningStatus_NotInlined;
 }