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[Bug tree-optimization/41031] [4.5 Regression]: build breakage for cris-elf building newlib, ICE in insert_value_copy_on_edge
- From: "hp at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 11 Aug 2009 01:02:32 -0000
- Subject: [Bug tree-optimization/41031] [4.5 Regression]: build breakage for cris-elf building newlib, ICE in insert_value_copy_on_edge
- References: <bug-41031-507@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #2 from hp at gcc dot gnu dot org 2009-08-11 01:02 -------
I had a brief look. Seems like the new code assumes that promote_mode always
promotes the input mode (ahem! :) when mismatching, which it only does if the
target defines PROMOTE_MODE (which CRIS does not; it just has a
TARGET_PROMOTE_FUNCTION_MODE hook). So, a QImode is still QImode and
mismatching SImode for the object in SA.partition_to_pseudo[dest])).
At the gcc_assert in question:
(gdb) p src_mode
$24 = QImode
(gdb) p unsignedp
$25 = 0
(gdb) p dest_mode
$26 = QImode
(gdb) p dest
$27 = 3
(gdb) p SA.partition_to_pseudo[dest]
$28 = (rtx) 0xb7e658f0
(gdb) pr
(reg/v:SI 220 [ type ])
hth
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41031