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From: "ramana at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/40783] inefficient code to accumulate function return values
Date: Mon, 27 Jul 2009 15:05:00 -0000 [thread overview]
Message-ID: <20090727150521.723.qmail@sourceware.org> (raw)
In-Reply-To: <bug-40783-17659@http.gcc.gnu.org/bugzilla/>
------- Comment #2 from ramana at gcc dot gnu dot org 2009-07-27 15:05 -------
This seems to be related to the other reassoc + register pressure bugs reported
in the database. I am not sure if this is a dup of either PR28481 or PR27855
but they appear to be related.
With -fno-tree-reassoc I get the same code for both loops.
time_math:
push {r4, r5, r6, lr}
bl dumm
mov r4, #0
mov r6, #99
add r5, r0, #0
.L2:
add r0, r5, #0
bl __aeabi_f2iz
add r5, r5, #1
add r4, r4, r0
add r0, r5, #0
bl __aeabi_f2iz
add r5, r5, #1
add r4, r4, r0
add r0, r5, #0
bl __aeabi_f2iz
add r5, r5, #1
add r4, r4, r0
add r0, r5, #0
bl __aeabi_f2iz
add r5, r5, #1
add r4, r4, r0
sub r6, r6, #1
bcs .L2
bl dumm
mov r6, #99
add r5, r0, #0
.L3:
add r0, r5, #0
bl MyConvert
add r5, r5, #1
add r4, r4, r0
add r0, r5, #0
bl MyConvert
add r5, r5, #1
add r4, r4, r0
add r0, r5, #0
bl MyConvert
add r5, r5, #1
add r4, r4, r0
add r0, r5, #0
bl MyConvert
add r5, r5, #1
add r4, r4, r0
sub r6, r6, #1
bcs .L3
mov r0, r4
@ sp needed for prologue
pop {r4, r5, r6, pc}
.size time_math, .-time_math
.ident "GCC: (GNU) 4.5.0 20090727 (experimental)"
--
ramana at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dberlin at gcc dot gnu dot
| |org
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2009-07-27 15:05:21
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40783
next prev parent reply other threads:[~2009-07-27 15:05 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-17 6:56 [Bug target/40783] New: " carrot at google dot com
2009-07-17 6:56 ` [Bug target/40783] " carrot at google dot com
2009-07-27 15:05 ` ramana at gcc dot gnu dot org [this message]
2009-12-12 1:17 ` rearnsha at gcc dot gnu dot org
[not found] <bug-40783-4@http.gcc.gnu.org/bugzilla/>
2021-07-26 8:07 ` pinskia at gcc dot gnu.org
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