implement test for tail call optimization

src/test/functionCall/functionCall.c

@@ -92,4 +92,28 @@ int runFunctionCallTests () {
   argumentTest("fgetMix8(...args)", 8, fgetMix8());
   argumentTest_f("fgetMix9(...args)", 9.0, fgetMix9());
   argumentTest("fgetMix10(...args)", 10, fgetMix10());
+
+  printf("\nTail Call Tests \n");
+  // Checks that tails calls are properly invoked
+  argumentTest("arg1Tail(...args)", 1, arg1Tail(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10));
+  argumentTest("arg2Tail(...args)", 2, arg2Tail(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10));
+  argumentTest("arg3Tail(...args)", 3, arg3Tail(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10));
+  argumentTest("arg4Tail(...args)", 4, arg4Tail(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10));
+  argumentTest("arg5Tail(...args)", 5, arg5Tail(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10));
+  argumentTest("arg6Tail(...args)", 6, arg6Tail(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10));
+  argumentTest("arg7Tail(...args)", 7, arg7Tail(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10));
+  argumentTest("arg8Tail(...args)", 8, arg8Tail(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10));
+  argumentTest("arg9Tail(...args)", 9, arg9Tail(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10));
+  argumentTest("arg10Tail(...args)", 10, arg10Tail(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10));
+  // Checks that parameters are correctly passed from klang to functions
+  argumentTest("get1Tail(...args)", 1, get1Tail(10));
+  argumentTest("get2Tail(...args)", 2, get2Tail(10));
+  argumentTest("get3Tail(...args)", 3, get3Tail(10));
+  argumentTest("get4Tail(...args)", 4, get4Tail(10));
+  argumentTest("get5Tail(...args)", 5, get5Tail(10));
+  argumentTest("get6Tail(...args)", 6, get6Tail(10));
+  argumentTest("get7Tail(...args)", 7, get7Tail(10));
+  argumentTest("get8Tail(...args)", 8, get8Tail(10));
+  argumentTest("get9Tail(...args)", 9, get9Tail(10));
+  argumentTest("get10Tail(...args)", 10, get10Tail(10));
 }

src/test/functionCall/functionCall.h

@@ -20,6 +20,28 @@ long get8();
 long get9();
 long get10();
 
+long arg1Tail(long a, long b, long c, long d, long e, long f, long g, long h, long i, long j, long count);
+long arg2Tail(long a, long b, long c, long d, long e, long f, long g, long h, long i, long j, long count);
+long arg3Tail(long a, long b, long c, long d, long e, long f, long g, long h, long i, long j, long count);
+long arg4Tail(long a, long b, long c, long d, long e, long f, long g, long h, long i, long j, long count);
+long arg5Tail(long a, long b, long c, long d, long e, long f, long g, long h, long i, long j, long count);
+long arg6Tail(long a, long b, long c, long d, long e, long f, long g, long h, long i, long j, long count);
+long arg7Tail(long a, long b, long c, long d, long e, long f, long g, long h, long i, long j, long count);
+long arg8Tail(long a, long b, long c, long d, long e, long f, long g, long h, long i, long j, long count);
+long arg9Tail(long a, long b, long c, long d, long e, long f, long g, long h, long i, long j, long count);
+long arg10Tail(long a, long b, long c, long d, long e, long f, long g, long h, long i, long j, long count);
+
+long get1Tail(long count);
+long get2Tail(long count);
+long get3Tail(long count);
+long get4Tail(long count);
+long get5Tail(long count);
+long get6Tail(long count);
+long get7Tail(long count);
+long get8Tail(long count);
+long get9Tail(long count);
+long get10Tail(long count);
+
 double farg1(double a, double b, double c, double d, double e, double f, double g, double h, double i, double j);
 double farg2(double a, double b, double c, double d, double e, double f, double g, double h, double i, double j);
 double farg3(double a, double b, double c, double d, double e, double f, double g, double h, double i, double j);

src/test/test.k

@@ -106,6 +106,127 @@ function get10(): int {
   return arg10(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
 }
 
+// TAIL CALL
+function arg1Tail(a: int, b: int, c: int,d: int,e: int,f: int,g: int, h: int,i: int,j: int, count: int): int {
+  if (count <= 0) {
+    return a;
+  }
+
+  return arg1Tail(a, b, c, d, e, f, g, h, i, j, count - 1);
+}
+
+function get1Tail(count: int): int {
+  return arg1Tail(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10);
+}
+
+function arg2Tail(a: int, b: int, c: int,d: int,e: int,f: int,g: int, h: int,i: int,j: int, count: int): int {
+  if (count <= 0) {
+    return b;
+  }
+
+  return arg2Tail(a, b, c, d, e, f, g, h, i, j, count - 1);
+}
+
+function get2Tail(count: int): int {
+  return arg2Tail(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10);
+}
+
+function arg3Tail(a: int, b: int, c: int,d: int,e: int,f: int,g: int, h: int,i: int,j: int, count: int): int {
+  if (count <= 0) {
+    return c;
+  }
+
+  return arg3Tail(a, b, c, d, e, f, g, h, i, j, count - 1);
+}
+
+function get3Tail(count: int): int {
+  return arg3Tail(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10);
+}
+
+function arg4Tail(a: int, b: int, c: int,d: int,e: int,f: int,g: int, h: int,i: int,j: int, count: int): int {
+  if (count <= 0) {
+    return d;
+  }
+
+  return arg4Tail(a, b, c, d, e, f, g, h, i, j, count - 1);
+}
+
+function get4Tail(count: int): int {
+  return arg4Tail(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10);
+}
+
+function arg5Tail(a: int, b: int, c: int,d: int,e: int,f: int,g: int, h: int,i: int,j: int, count: int): int {
+  if (count <= 0) {
+    return e;
+  }
+
+  return arg5Tail(a, b, c, d, e, f, g, h, i, j, count - 1);
+}
+
+function get5Tail(count: int): int {
+  return arg5Tail(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10);
+}
+
+function arg6Tail(a: int, b: int, c: int,d: int,e: int,f: int,g: int, h: int,i: int,j: int, count: int): int {
+  if (count <= 0) {
+    return f;
+  }
+
+  return arg6Tail(a, b, c, d, e, f, g, h, i, j, count - 1);
+}
+
+function get6Tail(count: int): int {
+  return arg6Tail(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10);
+}
+
+function arg7Tail(a: int, b: int, c: int,d: int,e: int,f: int,g: int, h: int,i: int,j: int, count: int): int {
+  if (count <= 0) {
+    return g;
+  }
+
+  return arg7Tail(a, b, c, d, e, f, g, h, i, j, count - 1);
+}
+
+function get7Tail(count: int): int {
+  return arg7Tail(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10);
+}
+
+function arg8Tail(a: int, b: int, c: int,d: int,e: int,f: int,g: int, h: int,i: int,j: int, count: int): int {
+  if (count <= 0) {
+    return h;
+  }
+
+  return arg8Tail(a, b, c, d, e, f, g, h, i, j, count - 1);
+}
+
+function get8Tail(count: int): int {
+  return arg8Tail(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10);
+}
+
+function arg9Tail(a: int, b: int, c: int,d: int,e: int,f: int,g: int, h: int,i: int,j: int, count: int): int {
+  if (count <= 0) {
+    return i;
+  }
+
+  return arg9Tail(a, b, c, d, e, f, g, h, i, j, count - 1);
+}
+
+function get9Tail(count: int): int {
+  return arg9Tail(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10);
+}
+
+function arg10Tail(a: int, b: int, c: int, d: int, e: int, f: int, g: int, h: int, i: int, j: int, count: int): int {
+  if (count <= 0) {
+    return j;
+  }
+
+  return arg10Tail(a, b, c, d, e, f, g, h, i, j, count - 1);
+}
+
+function get10Tail(count: int): int {
+  return arg10Tail(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10);
+}
+
 // FLOATS
 
 function farg1(a: float, b: float, c: float, d: float, e: float, f: float, g: float, h: float, i: float ,j: float): float {