VT_REF is not mentioned in the documentation and seems to be used only
for x86_64. Also, it seems to be the same thing as VT_LLOCAL, really.
This could be a first step towards removing it altogether.
Commit message:
Make it explicit that VT_REF is used only for TCC_TARGET_X86_64.
tcc.h: Make the definition conditional on TCC_TARGET_X86_64.
tccgen.c: Since the VT_REF bit is set only in x86_64-gen.c we
can make clearing it and testing for it conditional.
diff --git a/tcc.h b/tcc.h
index 3f7d43b..33fbef9 100644
--- a/tcc.h
+++ b/tcc.h
@@ -738,7 +738,9 @@ struct TCCState {
#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) */
+#ifdef TCC_TARGET_X86_64
#define VT_REF 0x0040 /* value is pointer to structure rather than address */
+#endif
#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 510051a..6151e4c 100644
--- a/tccgen.c
+++ b/tccgen.c
@@ -683,8 +683,10 @@ static void move_reg(int r, int s, int t)
/* get address of vtop (vtop MUST BE an lvalue) */
static void gaddrof(void)
{
+#ifdef TCC_TARGET_X86_64
if (vtop->r & VT_REF)
gv(RC_INT);
+#endif
vtop->r &= ~VT_LVAL;
/* tricky: if saved lvalue, then we can go back to lvalue */
if ((vtop->r & VT_VALMASK) == VT_LLOCAL)
@@ -889,13 +891,12 @@ ST_FUNC int gv(int rc)
t = vtop->type.t;
t1 = t;
/* compute memory access type */
- if (vtop->r & VT_REF)
#ifdef TCC_TARGET_X86_64
+ if (vtop->r & VT_REF)
t = VT_PTR;
-#else
- t = VT_INT;
+ else
#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;
@@ -3863,7 +3864,11 @@ ST_FUNC void unary(void)
skip(')');
if ((vtop->r & VT_VALMASK) != VT_LOCAL)
tcc_error("__builtin_va_start expects a local variable");
+#ifdef TCC_TARGET_X86_64
vtop->r &= ~(VT_LVAL | VT_REF);
+#else
+ vtop->r &= ~VT_LVAL;
+#endif
vtop->type = char_pointer_type;
vstore();
}
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