[LLVMbugs] [Bug 3354] apparent bad interaction between math and short-circuit
bugzilla-daemon at cs.uiuc.edu
bugzilla-daemon at cs.uiuc.edu
Mon Jan 19 14:05:51 PST 2009
http://llvm.org/bugs/show_bug.cgi?id=3354
Eli Friedman <sharparrow1 at yahoo.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |sharparrow1 at yahoo.com
Status|RESOLVED |REOPENED
Resolution|FIXED |
--- Comment #4 from Eli Friedman <sharparrow1 at yahoo.com> 2009-01-19 16:05:51 ---
(In reply to comment #3)
> Reassociate was moving a constant expression to a different block under the
> assumption that constants can't have side effects. I think that this is a
> reasonable expectation, so I changed x/0 to constant fold into undef as is
> allowed by langref.
That's only a workaround... what if the denominator is an unfoldable constant?
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