[Bug optimization/13653] [3.3 regression] -O2 -funroll-loop miscompiles POOMA testcase

[rguenth at tat dot physik dot uni-tuebingen dot de]

------- Additional Comments From rguenth at tat dot physik dot uni-tuebingen dot de  2004-01-18 13:23 -------
Subject: Re:  [3.3 regression] -O2 -funroll-loop
 miscompiles POOMA testcase

On Sun, 18 Jan 2004, dberlin at gcc dot gnu dot org wrote:

> Just a progress update
> This is taking a while to minimize because it takes 40 seconds per compile at the current length
> and i do two compiles per minimize, to make sure it works at -O2 but breaks with -O2 -funroll-
> loops.
> It'll probably be another few days before it's minimal.
> But it's already gotten 25% smaller

Many thanks for doing this work!  Couldn't tree-ssa be used to re-produce
sourcecode after DCE?  Or even just using cgraph for detecting completely
unused classes/methods?  (I thought of using the symbol table of a -O0
compile to extract used stuff, but that requires a C++ parser again...)

Richard.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13653