unsorted adjustments

- configure
  * use aarch64 instead of arm64

- Makefile
  * rename the custom include file to "config-extra.mak"
  * Also avoid "rm -r /*" if $(tccdir) is empty

- pp/Makefile
  * fix .expect generation with gcc

- tcc.h
  * cleanup #defines for _MSC_VER

- tccgen.c:
  * fix const-propagation for &,|
  * fix anonymous named struct (ms-extension) and enable
    -fms-extension by default

- i386-gen.c
  * clear VT_DEFSIGN

- x86_64-gen.c/win64:
  * fix passing structs in registers
  * fix alloca (need to keep "func_scratch" below each alloca area on stack)
    (This allows to compile a working gnu-make on win64)

- tccpp.c
  * alternative approach to 37999a4fbf3487b363fd0c2f9b7ab622401b202a
    This is to avoid some slowdown with ## token pasting.
  * get_tok_str() : return <eof> for TOK_EOF
  * -funsigned-char: apply to "string" literals as well

- tccpe/tools.c: -impdef: support both 32 and 64 bit dlls anyway

1 files changed, 10 insertions, 4 deletions

diff --git a/tccgen.c b/tccgen.c
index af8d2a7..40bed59 100644
--- a/tccgen.c
+++ b/tccgen.c
@@ -1752,8 +1752,8 @@ static void gen_opic(int op)
             vtop--;
         } else if (!const_wanted &&
                    c2 && ((l2 == 0 && (op == '&' || op == '*')) ||
-                          (l2 == -1 && op == '|') ||
-                          (l2 == 0xffffffff && t2 != VT_LLONG && op == '|') ||
+                          (op == '|' &&
+                            (l2 == -1 || (l2 == 0xFFFFFFFF && t2 != VT_LLONG))) ||
                           (l2 == 1 && (op == '%' || op == TOK_UMOD)))) {
             /* treat (x & 0), (x * 0), (x | -1) and (x % 1) as constant */
             if (l2 == 1)
@@ -1767,7 +1767,7 @@ static void gen_opic(int op)
                             op == TOK_SHL || op == TOK_SHR || op == TOK_SAR) &&
                            l2 == 0) ||
                           (op == '&' &&
-                           l2 == -1))) {
+                            (l2 == -1 || (l2 == 0xFFFFFFFF && t2 != VT_LLONG))))) {
             /* filter out NOP operations like x*1, x-0, x&-1... */
             vtop--;
         } else if (c2 && (op == '*' || op == TOK_PDIV || op == TOK_UDIV)) {
@@ -1817,6 +1817,10 @@ static void gen_opif(int op)
 {
     int c1, c2;
     SValue *v1, *v2;
+#if defined _MSC_VER && defined _AMD64_
+    /* avoid bad optimization with f1 -= f2 for f1:-0.0, f2:0.0 */
+    volatile
+#endif
     long double f1, f2;
 
     v1 = vtop - 1;
@@ -3497,7 +3501,7 @@ static void struct_decl(CType *type, AttributeDef *ad, int u)
         if (v < TOK_IDENT)
             expect("struct/union/enum name");
         s = struct_find(v);
-        if (s && (s->scope == local_scope || (tok != '{' && tok != ';'))) {
+        if (s && (s->scope == local_scope || tok != '{')) {
             if (s->type.t != a)
                 tcc_error("redefinition of '%s'", get_tok_str(v, NULL));
             goto do_decl;
@@ -4381,6 +4385,8 @@ ST_FUNC void unary(void)
     case TOK_STR:
         /* string parsing */
         t = VT_BYTE;
+        if (tcc_state->char_is_unsigned)
+            t = VT_BYTE | VT_UNSIGNED;
     str_init:
         if (tcc_state->warn_write_strings)
             t |= VT_CONSTANT;