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[Bug target/68620] ICE on gcc.target/arm/attr-neon-fp16.c
- From: "clyon at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 02 Dec 2015 16:16:12 +0000
- Subject: [Bug target/68620] ICE on gcc.target/arm/attr-neon-fp16.c
- Auto-submitted: auto-generated
- References: <bug-68620-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68620
--- Comment #1 from Christophe Lyon <clyon at gcc dot gnu.org> ---
The problem happens when trying to extract subregs from V4HF.
On big-endian, CANNOT_CHANGE_MODE_CLASS returns 1, which at some point makes
xpart = operand_subword (x, i, 1, mode); (in emit_move_multi_word)
return NULL in xpart, later trigging the assert.