[Bug middle-end/27733] [4.1/4.2 Regression] Large compile time regression

[sje at cup dot hp dot com]

------- Comment #13 from sje at cup dot hp dot com  2006-06-08 15:11 -------
The proposed patch does fix the compilation time problem on hppa64-hp-hpux11.11
but I am confused about how the cache works.  Without the patch, the compile
takes 15 to 20 minutes but I do wind up generating a sequence of instructions
instead of a call to __divdi3.  With the patch, I get a very fast compilation,
but I also get a call to __divdi3 instead of the code sequence.  Why does
caching results change the behaviour?  Caches (in general) should speed things
up by saving previous/intermediate results, but shouldn't change the ultimate
answer.  This seems to be doing something different.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27733