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Fix segfault of romcc when complex assignment operators 

were applied to non-trivial LHSs, eg.  c[4] |= 1;

Signed-off-by: Patrick Georgi <patrick.georgi@coresystems.de>
Acked-by: Stefan Reinauer <stepan@coresystems.de>


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5210 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Patrick Georgi 2010-03-14 22:20:57 +00:00
parent cc66926955
commit f761aef932
1 changed files with 13 additions and 9 deletions
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22
util/romcc/romcc.c
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@ -1896,12 +1896,16 @@ static void use_triple(struct triple *used, struct triple *user)
return;
if (!user)
return;
ptr = &used->use;
while(*ptr) {
if ((*ptr)->member == user) {
return;
if (used->use == (void*)-1)
used->use = 0;
if (used->use) {
ptr = &used->use;
while(*ptr) {
if ((*ptr)->member == user) {
return;
}
ptr = &(*ptr)->next;
}
ptr = &(*ptr)->next;
}
/* Append new to the head of the list,
* copy_func and rename_block_variables
@ -11599,19 +11603,19 @@ static struct triple *assignment_expr(struct compile_state *state)
}
def = write_expr(state, left,
triple(state, op, left->type,
read_expr(state, left), right));
read_expr(state, copy_triple(state, left)), right));
break;
case TOK_PLUSEQ:
lvalue(state, left);
eat(state, TOK_PLUSEQ);
def = write_expr(state, left,
mk_add_expr(state, left, assignment_expr(state)));
mk_add_expr(state, copy_triple(state, left), assignment_expr(state)));
break;
case TOK_MINUSEQ:
lvalue(state, left);
eat(state, TOK_MINUSEQ);
def = write_expr(state, left,
mk_sub_expr(state, left, assignment_expr(state)));
mk_sub_expr(state, copy_triple(state, left), assignment_expr(state)));
break;
case TOK_SLEQ:
case TOK_SREQ:
@ -11635,7 +11639,7 @@ static struct triple *assignment_expr(struct compile_state *state)
}
def = write_expr(state, left,
triple(state, op, left->type,
read_expr(state, left), right));
read_expr(state, copy_triple(state,left)), right));
break;
}
return def;