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x86-64: Fix long long bug

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With the last improvements to lexpand it's now harmful
to use on native 64bit platforms when not necessary.  For gv_dup
it's not necessary there.  It can still be used with really
transforming a 64bit value into two 32bit ones.
This commit is contained in:
Michael Matz 2016-10-17 00:57:16 +02:00
parent d9b7f018ce
commit 68a7af632c
1 changed files with 7 additions and 2 deletions
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9
tccgen.c
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@ -1209,7 +1209,7 @@ static int reg_fret(int t)
return REG_FRET;
}
/* expand long long on stack in two ints */
/* expand 64bit on stack in two ints */
static void lexpand(void)
{
int u, v;
@ -1258,6 +1258,7 @@ ST_FUNC void lexpand_nr(void)
}
#endif
#if !defined(TCC_TARGET_X86_64) && !defined(TCC_TARGET_ARM64)
/* build a long long from two ints */
static void lbuild(int t)
{
@ -1266,6 +1267,7 @@ static void lbuild(int t)
vtop[-1].type.t = t;
vpop();
}
#endif
/* rotate n first stack elements to the bottom
I1 ... In -> I2 ... In I1 [top is right]
@ -1329,6 +1331,7 @@ static void gv_dup(void)
SValue sv;
t = vtop->type.t;
#if !defined(TCC_TARGET_X86_64) && !defined(TCC_TARGET_ARM64)
if ((t & VT_BTYPE) == VT_LLONG) {
lexpand();
gv_dup();
@ -1343,7 +1346,9 @@ static void gv_dup(void)
vswap();
lbuild(t);
vswap();
} else {
} else
#endif
{
/* duplicate value */
rc = RC_INT;
sv.type.t = VT_INT;