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Fix ICE in use-after-scope w/ -fno-tree-dce (PR sanitize/79783). 

2017-03-06  Martin Liska  <mliska@suse.cz>

	PR sanitize/79783
	* asan.c (asan_expand_poison_ifn): Do not expand ASAN_POISON
	when having a SSA NAME w/o VAR_DECL assigned to it.
2017-03-06  Martin Liska  <mliska@suse.cz>

	PR sanitize/79783
	* g++.dg/asan/pr79783.C: New test.

From-SVN: r245912
This commit is contained in:
Martin Liska 2017-03-06 11:20:33 +01:00 committed by Martin Liska
parent 5ada812ced
commit a50a32aa3c
4 changed files with 35 additions and 1 deletions
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6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2017-03-06 Martin Liska <mliska@suse.cz>
PR sanitize/79783
* asan.c (asan_expand_poison_ifn): Do not expand ASAN_POISON
when having a SSA NAME w/o VAR_DECL assigned to it.
2017-03-06 Prachi Godbole <prachi.godbole@imgtec.com>
* config/mips/mips-msa.md (msa_dotp_<su>_d, msa_dpadd_<su>_d,

6
gcc/asan.c
View File

@ -3107,12 +3107,16 @@ asan_expand_poison_ifn (gimple_stmt_iterator *iter,
{
gimple *g = gsi_stmt (*iter);
tree poisoned_var = gimple_call_lhs (g);
if (!poisoned_var)
if (!poisoned_var || has_zero_uses (poisoned_var))
{
gsi_remove (iter, true);
return true;
}
if (SSA_NAME_VAR (poisoned_var) == NULL_TREE)
SET_SSA_NAME_VAR_OR_IDENTIFIER (poisoned_var,
create_tmp_var (TREE_TYPE (poisoned_var)));
tree shadow_var = create_asan_shadow_var (SSA_NAME_VAR (poisoned_var),
shadow_vars_mapping);

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2017-03-06 Martin Liska <mliska@suse.cz>
PR sanitize/79783
* g++.dg/asan/pr79783.C: New test.
2017-03-06 Prachi Godbole <prachi.godbole@imgtec.com>
* gcc.target/mips/msa-dotp.c: New tests.

19
gcc/testsuite/g++.dg/asan/pr79783.C Normal file
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@ -0,0 +1,19 @@
// PR sanitizer/79783
// { dg-options "-fno-tree-dce" }
struct A
{
static void foo(const char&) {}
};
struct B
{
B() { A::foo(char()); }
};
struct C
{
virtual void bar() const { B b; }
};
C c;