[Bug tree-optimization/37526] [4.4 Regression] ICE using --combine -O2

[rguenth at gcc dot gnu dot org]

------- Comment #7 from rguenth at gcc dot gnu dot org  2008-09-16 13:20 -------
./cc1 -quiet -O2 t1.i t2.i     
t2.i: In function 'Node_print':
t2.i:2: error: non-trivial conversion at assignment
struct _IO_FILE *
struct _IO_FILE *
# LOADS:  { stderr }
stderr.0_3 = stderr;

t2.i:2: error: non-trivial conversion at assignment
struct _IO_FILE *
struct _IO_FILE *
# LOADS:  { stderr }
stderr.0_4 = stderr;

t2.i:2: internal compiler error: verify_stmts failed
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.


So we have wrong GIMPLE here.  GIGO.

Value numbering stderr.0_3 stmt = stderr.0_3 = stderr;
Setting value number of stderr.0_3 to stderr.0_3
...
Value numbering stderr.0_4 stmt = stderr.0_4 = stderr;
Inserting name stderr.0_17 for expression (struct _IO_FILE *) stderr.0_3
Setting value number of stderr.0_4 to stderr.0_17


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |rguenth at gcc dot gnu dot
                   |                            |org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37526