[Bug tree-optimization/35518] [4.4 Regression] FAIL: gcc.c-torture/execute/20040709-1.c execution at -O2 and above

[rguenther at suse dot de]

------- Comment #30 from rguenther at suse dot de  2008-09-02 09:16 -------
Subject: Re:  [4.4 Regression] FAIL:
 gcc.c-torture/execute/20040709-1.c execution at -O2 and above

On Mon, 1 Sep 2008, dave at hiauly1 dot hia dot nrc dot ca wrote:

> ------- Comment #29 from dave at hiauly1 dot hia dot nrc dot ca  2008-09-01 18:17 -------
> Subject: Re:  [4.4 Regression] FAIL: gcc.c-torture/execute/20040709-1.c
> execution at -O2 and above
> 
> > On hppa64-hp-hpux11.11, the test still fails at certain optimizations:
> > 
> > FAIL: gcc.c-torture/execute/20040709-1.c execution,  -O0 
> > FAIL: gcc.c-torture/execute/20040709-1.c execution,  -O1 
> 
> I'm also seeing the following two fails which appear at first sight to
> be related:
> 
> FAIL: gcc.c-torture/execute/920908-2.c execution,  -O0 
> FAIL: gcc.c-torture/execute/920908-2.c execution,  -O1 

Interesting.  The -O0 failure hints at either wrong IL from the start,
problems with expansion or with the backend itself (expansion of
bitfield operations nowadays expects to be able to truncate intermediate
results to the respective bitfield precision, in former times this
was not done).

Please try to reduce these large testcases and analyze the -O0 failure.

Thanks,
Richard.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35518