Handle arithmetic on (long, double) and (double, long) inline

Author: eregon

src/main/java/org/truffleruby/core/inlined/InlinedAddNode.java

@@ -45,6 +45,16 @@ protected double floatAdd(double a, double b) {
         return a + b;
     }
 
+    @Specialization(assumptions = "assumptions")
+    protected double longDouble(long a, double b) {
+        return a + b;
+    }
+
+    @Specialization(assumptions = "assumptions")
+    protected double doubleLong(double a, long b) {
+        return a + b;
+    }
+
     @Specialization
     protected Object fallback(VirtualFrame frame, Object a, Object b) {
         return rewriteAndCall(frame, a, b);

src/main/java/org/truffleruby/core/inlined/InlinedDivNode.java

@@ -43,6 +43,16 @@ protected double floatDiv(double a, double b) {
         return a / b;
     }
 
+    @Specialization(assumptions = "assumptions")
+    protected double longDouble(long a, double b) {
+        return a / b;
+    }
+
+    @Specialization(assumptions = "assumptions")
+    protected double doubleLong(double a, long b) {
+        return a / b;
+    }
+
     @Specialization
     protected Object fallback(VirtualFrame frame, Object a, Object b) {
         return rewriteAndCall(frame, a, b);

src/main/java/org/truffleruby/core/inlined/InlinedMulNode.java

@@ -45,6 +45,16 @@ protected double floatMul(double a, double b) {
         return a * b;
     }
 
+    @Specialization(assumptions = "assumptions")
+    protected double longDouble(long a, double b) {
+        return a * b;
+    }
+
+    @Specialization(assumptions = "assumptions")
+    protected double doubleLong(double a, long b) {
+        return a * b;
+    }
+
     @Specialization
     protected Object fallback(VirtualFrame frame, Object a, Object b) {
         return rewriteAndCall(frame, a, b);

src/main/java/org/truffleruby/core/inlined/InlinedSubNode.java

@@ -45,6 +45,16 @@ protected double floatSub(double a, double b) {
         return a - b;
     }
 
+    @Specialization(assumptions = "assumptions")
+    protected double longDouble(long a, double b) {
+        return a - b;
+    }
+
+    @Specialization(assumptions = "assumptions")
+    protected double doubleLong(double a, long b) {
+        return a - b;
+    }
+
     @Specialization
     protected Object fallback(VirtualFrame frame, Object a, Object b) {
         return rewriteAndCall(frame, a, b);