macro1.c: Add more macro expansion tests.

	* gcc.dg/cpp/macro1.c: Add more macro expansion tests.
	* gcc.dg/cpp/strify2.c: Same.

From-SVN: r34867

gcc/testsuite/ChangeLog

+2000-07-04  Neil Booth  <NeilB@earthling.net>
+
+	* gcc.dg/cpp/macro1.c: Add more macro expansion tests.
+	* gcc.dg/cpp/strify2.c: Same.
+
 2000-07-03  Zack Weinberg  <zack@wolery.cumb.org>
 
 	* testsuite/gcc.dg/cpp/19951025-1.c: Adjust regexps.

gcc/testsuite/gcc.dg/cpp/macro1.c

@@ -2,21 +2,26 @@
 
 /* { dg-do run } */
 
-/* Tests various macros are correctly expanded.  */
+/* Tests various macro abuse is correctly expanded.  */
 
 extern int puts (const char *);
 extern void abort (void);
-#define err(str) do { puts(str); abort(); } while (0)
+extern int strcmp(const char *s1, const char *s2);
 
+#define err(str) do { puts(str); abort(); } while (0)
 #define j(x, y) x + y
 #define k(x, y) j(x + 2, y +
+#define glue(x, y) x ## y
+#define xglue(x, y) glue(x, y)
 
+/* Functions called when macros are left unexpanded.  */
 int q(int x)		{return x + 40;}
 int B(int x)		{return x + 20;}
 int foo(int x)		{return x + 10;}
 int bar(int x, int y)	{return x + y;}
 int baz(int x, int y)	{return x + y;}
 int toupper(int x)	{return x + 32;}
+int M(int x)		{return x * 2;}
 
 int main (int argc, char *argv[])
 {
@@ -48,25 +53,76 @@ int main (int argc, char *argv[])
   if (apply(bar, baz) != 42)	/* foo(foo(baz(22, 0))).  */
     err ("apply bar baz");
 
+  /* Taken from glibc.  */
 #define __tobody(c, f) f (c)
 #define toupper(c) __tobody (c, toupper)
   if (toupper (10) != 42)	/* toupper (10). */
     err ("toupper");
 
+  /* This tests that M gets expanded the right no. of times.  Too many
+     times, and we get excess "2 +"s and the wrong sum.  Derived from
+     nested stpcpy in dggettext.c.  */
+#define M(x) 2 + M(x)
+#define stpcpy(a) M(a)
+  if (stpcpy (stpcpy (9)) != 42) /*  2 + M (2 + M (9)) */
+    err ("stpcpy");
+
+  /* Another test derived from nested stpcpy's of dggettext.c.  Uses
+     macro A(x) and function B(x) as defined above.  The problem was
+     the same - excess "1 +"s and the wrong sum.  */
+#define B(x) 1 + B(x)
+#define C(x) A(x)
+  if (C(B(0)) != 42)		/* 1 + B (1 + B (0)) */
+    err ("C");
+
+  /* More tests derived from gcc itself - the use of XEXP and COST.
+     These first two should both expand to the same thing.  */
+  {
+    int insn = 6, i = 2, b = 2;
+#define XEXP(RTX, N)  (RTX * N + 2)
+#define PATTERN(INSN) XEXP(INSN, 3)
+    if (XEXP (PATTERN (insn), i) != 42)	/* ((insn * 3 + 2) * i + 2) */
+      err ("XEXP (PATTERN)");
+    if (XEXP (XEXP (insn, 3), i) != 42)	/* ((insn * 3 + 2) * i + 2) */
+      err ("XEXP (XEXP)");
+
+#define COST(X) XEXP (XEXP (X, 4), 4)
+    if (COST (b) != 42)		/* ((b * 4 + 2) * 4 + 2) */
+      err ("COST");
+  }
+
+  /* This tests macro recursion and expand-after-paste.  */
+#define FORTYTWO "forty"
+#define TWO TWO "-two"
+  if (strcmp (glue(FORTY, TWO), "forty"))
+    err ("glue");
+  if (strcmp (xglue(FORTY, TWO), "forty-two"))
+    err ("xglue");
+
+  /* Test ability to call macro over multiple logical lines.  */
+  if (q
+      (42) != 42
+      || q (
+	 42) != 42
+      || q (42
+	    ) != 42
+      || q
+      (
+       42
+       )
+      != 42)
+    err ("q over multiple lines");
+
+  /* Corner case.  Test that macro expansion is turned off for later
+     q, when not at start but at end of argument context, and supplied
+     with the '(' necessary for expansion.  */
+  if (q(1 + q)(1) != 42)	/* 1 + q(1) */
+    err ("Nested q");
+
   /* This looks like it has too many ')', but it hasn't.  */
   if (k(1, 4) 35) != 42)
     err ("k");
 
-    /*#define B(x) Z B(x)
-#define XEXP(RTX, N)  RTX->fld[N].rtx
-#define PATTERN(INSN) XEXP(INSN, 3)
-#define COST(X) XEXP (XEXP (x, 0), 0)
-#define M(a) OK M (a)
-#define stpcpy(a) M(a)
-#define C(x) A(x)
-XEXP (PATTERN (insn), i);
-XEXP (XEXP (insn, 3), i);
-COST (b)*/
-
+  /* Phew! */
   return 0;
 }

gcc/testsuite/gcc.dg/cpp/strify2.c

@@ -16,8 +16,9 @@ extern void abort (void);
 
 int main (int argc, char *argv[])
 {
-  str (\);			/* { dg-warning "valid string" "str(\)" } */
-  str (\\\);			/* { dg-warning "valid string" "str(\\\)" } */
+  str (\);		/* { dg-warning "valid string" "str(\\)" } */
+  str (\\);		/* OK.  */
+  str (\\\);		/* { dg-warning "valid string" "str(\\\\\\)" } */
 
   /* This also serves as a useful test of the value of __INCLUDE_LEVEL.  */
   if (strcmp (xstr (__INCLUDE_LEVEL__), "0"))
@@ -26,6 +27,9 @@ int main (int argc, char *argv[])
   if (strcmp(str (__INCLUDE_LEVEL__), "__INCLUDE_LEVEL__"))
     err ("macro name");
 
+  if (strcmp(str(), "") || strcmp(str( ), ""))
+    err ("empty string");
+
   if (strcmp(str ("s\n"), "\"s\\n\""))
     err ("quoted string");