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[Bug target/44597] [4.6 Regression] FAIL: gcc.c-torture/execute/builtin-prefetch-2.c compilation, ICE
- From: "bernds at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 21 Jun 2010 23:59:07 -0000
- Subject: [Bug target/44597] [4.6 Regression] FAIL: gcc.c-torture/execute/builtin-prefetch-2.c compilation, ICE
- References: <bug-44597-276@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #3 from bernds at gcc dot gnu dot org 2010-06-21 23:59 -------
At first glance, it looks like the tricks in the prefetch_cc simply aren't
valid. It seems to be trying to prevent certain types of addressing modes, but
reload is allowed to change them as it sees fit.
If I read the code right, hppa64 always uses flag_pic and thus the
reg_equiv_invariant machinery has always been disabled previously?
The best solution would be to find a way to write that pattern (and others, if
there are any) in a valid way; otherwise a new target macro might be able to
prevent this optimization on PA (however I don't think there's a guarantee that
this will work reliably).
The frame-address thing appears to be PR44505.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44597