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Re: target/6922: -mcpu=ultrasparc causes i.c.e. on lame mp3 encoder
- From: rth at gcc dot gnu dot org
- To: davem at redhat dot com, dontspamonme at excite dot com, gcc-bugs at gcc dot gnu dot org, gcc-prs at gcc dot gnu dot org, rth at gcc dot gnu dot org
- Date: 17 Jun 2002 06:07:24 -0000
- Subject: Re: target/6922: -mcpu=ultrasparc causes i.c.e. on lame mp3 encoder
- Reply-to: rth at gcc dot gnu dot org, davem at redhat dot com, dontspamonme at excite dot com, gcc-bugs at gcc dot gnu dot org, gcc-prs at gcc dot gnu dot org, rth at gcc dot gnu dot org, gcc-gnats at gcc dot gnu dot org
Synopsis: -mcpu=ultrasparc causes i.c.e. on lame mp3 encoder
State-Changed-From-To: open->analyzed
State-Changed-By: rth
State-Changed-When: Sun Jun 16 23:07:23 2002
State-Changed-Why:
Reproduced just fine with native and cross-compiler.
Bet you only tried 64-bit, Dave.
RTL incoming to loop has
(mult:DI (sign_extend:DI (reg:SI))
(sign_extend:DI (reg:SI)))
which is not handled by expand_mult_add. We wind up trying
to copy (sign_extend:DI (reg:SI)) directly into a register,
which we can't do in 32-bit mode.
Patch in progress.
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=6922