http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55073
Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |bernds at gcc dot gnu.org
--- Comment #16 from Richard Earnshaw <rearnsha at gcc dot gnu.org> 2012-11-30
18:50:11 UTC ---
I need to do some more digging, but it looks like it is the cprop_hardreg pass
that is really going wrong. My suspicion is that the pass is seeing
vswp D18, D19 // D19 is unused afterwards
use D18
and trying to remove the vswp operation entirely, by substituting D19 in for
D18, to give:
use D19
When doing this it really needs to delete the insn, but it fails to do so. The
result is that the code is now incorrect.
Bernd, I think you were the last to touch this, can you shed any further light
on the issue?
