--- Additional Comments From pinskia at gcc dot gnu dot org 2005-03-03
03:07 ---
This has no been fixed on the mainline. I think PRE has changed to not to
produce these dead phis.
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What|Removed |Added
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--- Additional Comments From pinskia at gcc dot gnu dot org 2004-12-02
21:56 ---
(In reply to comment #3)
> Here's another example of the same thing, minus the cast/double issue. This
> one
> is strength reduced for 3.4 but not for 4.0.
I filed PR 18800 for that, it has to do with loca
--- Additional Comments From pthaugen at us dot ibm dot com 2004-12-02
21:30 ---
Here's another example of the same thing, minus the cast/double issue. This one
is strength reduced for 3.4 but not for 4.0.
typedef struct {
union {
unsigned int Init[9];
unsigned char Link[37];
--- Additional Comments From rakdver at gcc dot gnu dot org 2004-12-01
21:44 ---
There is no additional cost counted for "(double *) coefPtr". The reason why
the result with the cast is different is because PRE creates a (dead) phi node
when moving the cast out of the loop. This phi no
--- Additional Comments From pinskia at gcc dot gnu dot org 2004-12-01
21:22 ---
Confirmed, I think what is really is happening is not actually due with the
cost of [reg +reg] but really
with the additional code of "(double *) coefPtr" which we should really be zero.
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Wh
