[Bug fortran/37903] [4.3/4.4 Regression] wrong-code for complicated vector subscripts

["mikael dot morin at tele2 dot fr" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #8 from mikael dot morin at tele2 dot fr  2008-10-28 14:42 -------
Created an attachment (id=16573)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16573&action=view)
second fix

This patch solves the problem by releasing the (4) condition, making the loop
bounds reset unconditional at the beginning of gfc_trans_create_temp_array. 
This is harmless because most of the time the loop->from is already zero (there
was an assertion for that before PR31610) and the code adds nothing, while in
other cases the bounds reset is executed. 


I had initially a problem though, because then the array indexes for accessing
elements of (/1,1,1/) were wrong as the offset for that array was set too
early, taking the initial loop bounds into account instead of the later
zero-based ones. 

I looked at what happened in the case of i as its indexes were not
miscalculated and found that there was a code for that at the end of
gfc_conv_loop_setup.

What this patch does is remove the code setting the offset according to the
loop in gfc_trans_array_constructor, and allow GFC_SS_CONSTRUCTOR in
gfc_conv_loop_setup's code.


This patch passes the regression tests without any new failure.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37903