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[Bug target/38599] New: There should be a Pmode == DImode version of the MIPS lwxs pattern
- From: "rsandifo 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 Dec 2008 14:06:30 -0000
- Subject: [Bug target/38599] New: There should be a Pmode == DImode version of the MIPS lwxs pattern
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
mipsisa64-elf-gcc -S -O2 -msmartmips gcc.target/mips/smartmips-lwxs.c
-DNOMIPS16=
does not produce an LWXS instruction. This doesn't really matter much, since
SmartMIPS is only for 32-bit processors, but:
(a) it works for 64-bit ILP32 ABIs like n32 and o64.
(b) within gcc, there is an abstraction layer between "Do we have SmartMIPS?"
and "Can we use LWXS?".
So I think it's worth having a Pmode==DImode version anyway.
I'm filing this for 4.5 or later; it isn't something we'd fix in 4,4 or
earlier.
--
Summary: There should be a Pmode == DImode version of the MIPS
lwxs pattern
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: target
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: rsandifo at gcc dot gnu dot org
GCC target triplet: mipsisa64-elf
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38599