[Bug target/34067] [4.3 regression] gfortran.dg/char_cshift_2.f90 fails with -O3 -funroll-loops fails on Intel Darwin

[paolo dot bonzini at lu dot unisi dot ch]

------- Comment #15 from paolo dot bonzini at lu dot unisi dot ch  2007-11-13 11:43 -------
Subject: Re:  [4.3 regression] gfortran.dg/char_cshift_2.f90
 fails with -O3 -funroll-loops fails on Intel Darwin


> bzip2 tar archive with four directories r42_O1, r42_O2, r43_O1, and r43_O2
> containing the result of -fdump-tree-all and the assembly codes for the
> different revisions and options (see comment #2).

Please use -fdump-rtl-all since fwprop is not a tree pass. :-)

Also, please check if the bug appears disappears with

-O2 -fno-forward-propagate -funroll-loops

versus

-O2 -funroll-loops

in both 130042 and 130043.  If the -fno-forward-propagate would make a 
difference, this would be a great way to narrow the bug.

Paolo


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34067