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[Bug target/55426] gcc.target/arm/neon-vld1_dupQ.c ICEs on armeb
- From: "mmatti.gcc at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 30 Nov 2012 09:28:04 +0000
- Subject: [Bug target/55426] gcc.target/arm/neon-vld1_dupQ.c ICEs on armeb
- Auto-submitted: auto-generated
- References: <bug-55426-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55426
--- Comment #5 from Manjunath S Matti <mmatti.gcc at gmail dot com> 2012-11-30 09:28:04 UTC ---
The "define_insn_and_split "neon_vld1_dupv2di" contains the DI move pattern
as second instruction in split. The pattern generated for the move are
subreg:DI (Reg:VDI) to subreg:DI (Reg:VDI).
Ideally, this pattern should use "*movdi_vfp" in vfp.md file as suggested by
Ramana.
However, the "*movdi_vfp" specifies that at least one of the operands should be
placed in register. So, subreg in our move pattern should satisfy the
condition.
However, the condition is not satisfied and hence the move pattern is not
being
recognized for DImode.
Hence, to allow the register in one of the operands, "neon_vld1_dupv2di"
pattern
was modified to use register in one of the operand.
Reload condition was removed as a pseudo register is used in one of the
operands. This modification fixed the ICE.
Tested with no extra regressions.