* [PATCH, IPA] Check pointer for 0 before use in `get_odr_type`
@ 2016-09-02 20:54 Kirill Yukhin
2016-09-02 21:04 ` Jakub Jelinek
0 siblings, 1 reply; 3+ messages in thread
From: Kirill Yukhin @ 2016-09-02 20:54 UTC (permalink / raw)
To: gcc-patches, hubicka
Hello,
Looks like `get_odr_type ()` contains code which dereferences
pointer before check it for zero. I moved the line under the check.
Bootstrap/regtest on x?86|x86_64 in progress.
Is it ok for trunk if pass?
gcc/
* gcc/ipa-devirt.c (get_odr_type): Check odr_types_ptr for
zero before dereferencing it.
--
Thanks, K
commit 9b822dfb4db14ce762a8d55cf76c677f3fae04bc
Author: Kirill Yukhin <kirill.yukhin@gmail.com>
Date: Fri Sep 2 23:40:55 2016 +0300
Access odr_type only if odr_type_ptr is not 0.
diff --git a/gcc/ipa-devirt.c b/gcc/ipa-devirt.c
index 2cf018b..cca912c 100644
--- a/gcc/ipa-devirt.c
+++ b/gcc/ipa-devirt.c
@@ -2132,12 +2132,14 @@ get_odr_type (tree type, bool insert)
}
else if (base_id > val->id)
{
- odr_types[val->id] = 0;
/* Be sure we did not recorded any derived types; these may need
renumbering too. */
gcc_assert (val->derived_types.length() == 0);
if (odr_types_ptr)
- val->id = odr_types.length ();
+ {
+ odr_types[val->id] = 0;
+ val->id = odr_types.length ();
+ }
vec_safe_push (odr_types_ptr, val);
}
return val;
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2016-09-02 20:54 [PATCH, IPA] Check pointer for 0 before use in `get_odr_type` Kirill Yukhin
2016-09-02 21:04 ` Jakub Jelinek
2016-09-02 21:06 ` Kirill Yukhin
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