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[Bug tree-optimization/54345] jump threading leaks e->aux heap memory
- From: "polacek at redhat dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 21 Sep 2012 15:11:08 +0000
- Subject: [Bug tree-optimization/54345] jump threading leaks e->aux heap memory
- Auto-submitted: auto-generated
- References: <bug-54345-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54345
--- Comment #3 from Marek Polacek <polacek at redhat dot com> 2012-09-21 15:11:08 UTC ---
Hmm. I hoped that something like this will show the leak, but no (it does a
lot of threading with -O2--through conditionals, through loop headers and also
through latches). But obviously it's not enough. Any ideas, please?
extern void bla (void);
extern void bar (void);
extern void foo (void);
void
thread_through_condition (int a, int b)
{
#define E if (a > b) \
bla (); \
else \
bar (); \
if (a <= b) \
foo ();
#define E10 E E E E E E E E E E
#define E100 E10 E10 E10 E10 E10 E10 E10 E10 E10 E10
#define E1000 E100 E100 E100 E100 E100 E100 E100 E100 E100 E100
#define EE E1000 E1000
EE
}
void
thread_entry_through_header (void)
{
int i;
#define A for (i = 0; i < 42; ++i) \
bla ();
#define A10 A A A A A A A A A A
#define A100 A10 A10 A10 A10 A10 A10 A10 A10 A10 A10
#define A1000 A100 A100 A100 A100 A100 A100 A100 A100 A100 A100
#define AA A1000 A1000 A1000 A1000 A1000
AA
}
void
thread_latch_through_header (void)
{
int i = 0;
int first;
#define L first = 1; i = 0; \
do { \
if (first) \
foo (); \
first = 0; \
bla (); \
} while (i++ < 100);
#define L10 L L L L L L L L L L
#define L100 L10 L10 L10 L10 L10 L10 L10 L10 L10 L10
#define L1000 L100 L100 L100 L100 L100 L100 L100 L100 L100 L100
L1000
}