tccpp : "tcc -E -P" : suppress empty lines

Also:
- regenerate all tests/pp/*.expect with gcc
- test "insert one space" feature
- test "0x1E-1" in asm mode case
- PARSE_FLAG_SPACES: ignore \f\v\r better
- tcc.h: move some things

tests/pp/02.expect

@@ -1,6 +1,5 @@
 f(2 * (y+1)) + f(2 * (f(2 * (z[0])))) % f(2 * (0)) + t(1);
-f(2 * (2+(3,4)-0,1)) | f(2 * (~ 5)) & f(2 * (0,1))^m(0,1);
-
+f(2 * (2 +(3,4)-0,1)) | f(2 * (~ 5)) & f(2 * (0,1))^m(0,1);
 char c[2][6] = { "hello", "" };
 f(2 * (y+1)) + f(2 * (f(2 * (z[0])))) % f(2 * (0)) + t(1);
-f(2 * (2+(3,4)-0,1)) | f(2 * (~ 5)) & f(2 * (0,1))^m(0,1);
+f(2 * (2 +(3,4)-0,1)) | f(2 * (~ 5)) & f(2 * (0,1))^m(0,1);

tests/pp/13.expect

@@ -1,6 +1,3 @@
 # `modelist' label. Each video mode record looks like:
-
-
-
 .text
 endtext:

tests/pp/15.c

@@ -0,0 +1,18 @@
+// insert a space between two tokens if otherwise they
+// would form a single token when read back
+
+#define n(x) x
+
+return (n(long)n(double))d;
+return n(A)n(++)n(+)n(B);
+return n(A)n(+)n(++)n(B);
+return n(A)n(++)n(+)n(+)n(B);
+
+// not a hex float
+return n(0x1E)n(-1);
+
+// unlike gcc but correct
+XXX: return n(x)+n(x)-n(1)+n(1)-2;
+
+// unlile gcc, but cannot appear in valid C
+XXX: return n(x)n(x)n(1)n(2)n(x);

tests/pp/15.expect

@@ -0,0 +1,7 @@
+return (long double)d;
+return A+++B;
+return A+ ++B;
+return A+++ +B;
+return 0x1E -1;
+XXX: return x+x-1 +1 -2;
+XXX: return x x 1 2 x;

tests/pp/Makefile

@@ -40,8 +40,8 @@ DIFF_OPTS = -Nu -b -B -I "^\#"
 clean:
 	rm -vf *.output
 
-# 02.test : DIFF_OPTS += -w
-# 15.test : DIFF_OPTS += -w
+02.test : DIFF_OPTS += -w
+15.test : DIFF_OPTS += -I"^XXX:"
 
 # diff options:
 # -b ighore space changes

tests/tcctest.c

@@ -2573,6 +2573,10 @@ void asm_test(void)
 {
     char buf[128];
     unsigned int val;
+
+    printf("inline asm:\n");
+
+    // parse 0x1E-1 as 3 tokens in asm mode
     asm volatile ("mov $0x1E-1,%eax");
 
     /* test the no operand case */