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fix vstack leak

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I think this code only affects the ARM EABI target, and only when
returning small structures that might be unaligned. However, it was both
leaking vstack entries and failing to achieve what I think is its
purpose, to ensure the sret argument would be aligned properly. Both
issues fixed.
This commit is contained in:
Philip
2015-04-29 21:32:14 +00:00
parent 44c330d647
commit 4126056fbe
1 changed files with 2 additions and 1 deletions
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3
tccgen.c
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@ -4916,12 +4916,13 @@ static void block(int *bsym, int *csym, int *case_sym, int *def_sym,
size = type_size(&func_vt,&align); size = type_size(&func_vt,&align);
if ((vtop->r != (VT_LOCAL | VT_LVAL) || (vtop->c.i & (ret_align-1))) if ((vtop->r != (VT_LOCAL | VT_LVAL) || (vtop->c.i & (ret_align-1)))
&& (align & (ret_align-1))) { && (align & (ret_align-1))) {
loc = (loc - size) & -align; loc = (loc - size) & -ret_align;
addr = loc; addr = loc;
type = func_vt; type = func_vt;
vset(&type, VT_LOCAL | VT_LVAL, addr); vset(&type, VT_LOCAL | VT_LVAL, addr);
vswap(); vswap();
vstore(); vstore();
vpop();
vset(&ret_type, VT_LOCAL | VT_LVAL, addr); vset(&ret_type, VT_LOCAL | VT_LVAL, addr);
} }
vtop->type = ret_type; vtop->type = ret_type;