Remove VT_REF

The canonical way to describe a local variable that actually holds
the address of an lvalue is VT_LLOCAL.  Remove the last user of VT_REF,
and handling of it, thereby freeing a flag for SValue.r.

3 files changed, 3 insertions, 12 deletions

diff --git a/tcc.h b/tcc.h
index ae7bb30..02619ba 100644
--- a/tcc.h
+++ b/tcc.h
@@ -825,7 +825,6 @@ struct filespec {
 #define VT_CMP       0x0033  /* the value is stored in processor flags (in vc) */
 #define VT_JMP       0x0034  /* value is the consequence of jmp true (even) */
 #define VT_JMPI      0x0035  /* value is the consequence of jmp false (odd) */
-#define VT_REF       0x0040  /* value is pointer to structure rather than address */
 #define VT_LVAL      0x0100  /* var is an lvalue */
 #define VT_SYM       0x0200  /* a symbol value is added */
 #define VT_MUSTCAST  0x0400  /* value must be casted to be correct (used for
diff --git a/tccgen.c b/tccgen.c
index 8d54ade..d8aa71e 100644
--- a/tccgen.c
+++ b/tccgen.c
@@ -1026,8 +1026,6 @@ static void move_reg(int r, int s, int t)
 /* get address of vtop (vtop MUST BE an lvalue) */
 ST_FUNC void gaddrof(void)
 {
-    if (vtop->r & VT_REF)
-        gv(RC_INT);
     vtop->r &= ~VT_LVAL;
     /* tricky: if saved lvalue, then we can go back to lvalue */
     if ((vtop->r & VT_VALMASK) == VT_LLOCAL)
@@ -1237,13 +1235,7 @@ ST_FUNC int gv(int rc)
                 t = vtop->type.t;
                 t1 = t;
                 /* compute memory access type */
-                if (vtop->r & VT_REF)
-#if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
-                    t = VT_PTR;
-#else
-                    t = VT_INT;
-#endif
-                else if (vtop->r & VT_LVAL_BYTE)
+                if (vtop->r & VT_LVAL_BYTE)
                     t = VT_BYTE;
                 else if (vtop->r & VT_LVAL_SHORT)
                     t = VT_SHORT;
@@ -4616,7 +4608,7 @@ ST_FUNC void unary(void)
             skip(')');
             if ((vtop->r & VT_VALMASK) != VT_LOCAL)
                 tcc_error("__builtin_va_start expects a local variable");
-            vtop->r &= ~(VT_LVAL | VT_REF);
+            vtop->r &= ~VT_LVAL;
             vtop->type = char_pointer_type;
             vtop->c.i += 8;
             vstore();
diff --git a/x86_64-gen.c b/x86_64-gen.c
index 9f19e78..0c0968c 100644
--- a/x86_64-gen.c
+++ b/x86_64-gen.c
@@ -957,7 +957,7 @@ void gfunc_prolog(CType *func_type)
             if (reg_param_index < REGN) {
                 gen_modrm64(0x89, arg_regs[reg_param_index], VT_LOCAL, NULL, addr);
             }
-            sym_push(sym->v & ~SYM_FIELD, type, VT_LOCAL | VT_LVAL | VT_REF, addr);
+            sym_push(sym->v & ~SYM_FIELD, type, VT_LLOCAL | VT_LVAL, addr);
         } else {
             if (reg_param_index < REGN) {
                 /* save arguments passed by register */