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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/43653] [4.3/4.4/4.5/4.6 Regression] ICE at reload1.c:1188 with -O1 -ftree-vectorize and empty struct
Date: Thu, 17 Feb 2011 21:34:00 -0000 [thread overview]
Message-ID: <bug-43653-4-dND3CUdqQk@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-43653-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43653
--- Comment #16 from Uros Bizjak <ubizjak at gmail dot com> 2011-02-17 21:05:11 UTC ---
The assembly from -O1 -ftree-vectorize -msse3 shows another opportunity for
enhancement PR19398 (secondary reloads don't consider "m" alternatives):
.LFB0:
.cfi_startproc
subq $416, %rsp
.cfi_def_cfa_offset 424
movq .LC1(%rip), %rax
leaq (%rsp,%rax), %rax
movq %rax, -112(%rsp)
(*) movq -112(%rsp), %xmm1
(*) punpcklqdq %xmm1, %xmm1
movdqa %xmm1, %xmm0
leaq -104(%rsp), %rax
leaq 408(%rsp), %rdx
.L2:
Looking at the definition of
(define_insn "*vec_dupv2di_sse3"
[(set (match_operand:V2DI 0 "register_operand" "=x,x")
(vec_duplicate:V2DI
(match_operand:DI 1 "nonimmediate_operand" " 0,m")))]
"TARGET_SSE3"
"@
punpcklqdq\t%0, %0
movddup\t{%1, %0|%0, %1}"
[(set_attr "type" "sselog1")
(set_attr "mode" "TI,DF")])
the two insns marked with (*) can be substituted with the second alternative:
movddup -112(%rsp), %xmm1.
next prev parent reply other threads:[~2011-02-17 21:05 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-43653-4@http.gcc.gnu.org/bugzilla/>
2010-12-25 23:43 ` [Bug rtl-optimization/43653] ICE: in reload, " devurandom at gmx dot net
2011-01-03 18:24 ` devurandom at gmx dot net
2011-01-03 19:59 ` [Bug rtl-optimization/43653] [4.3/4.4/4.5/4.6 Regression] " rguenth at gcc dot gnu.org
2011-01-03 20:00 ` rguenth at gcc dot gnu.org
2011-01-03 20:42 ` hjl.tools at gmail dot com
2011-02-15 17:51 ` [Bug rtl-optimization/43653] [4.3/4.4/4.5/4.6 Regression] ICE " law at redhat dot com
2011-02-15 18:36 ` ubizjak at gmail dot com
2011-02-15 19:21 ` law at redhat dot com
2011-02-15 21:07 ` law at redhat dot com
2011-02-15 22:43 ` ubizjak at gmail dot com
2011-02-16 5:08 ` law at redhat dot com
2011-02-16 8:32 ` [Bug target/43653] " ubizjak at gmail dot com
2011-02-16 11:29 ` ubizjak at gmail dot com
2011-02-17 8:34 ` uros at gcc dot gnu.org
2011-02-17 20:26 ` law at redhat dot com
2011-02-17 21:34 ` ubizjak at gmail dot com [this message]
2011-02-17 22:11 ` uros at gcc dot gnu.org
2011-02-17 23:23 ` uros at gcc dot gnu.org
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