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optimization/5075: sh-elf target optimize worse, save pr in leaf function
- From: bero at bekkoame dot ne dot jp
- To: gcc-gnats at gcc dot gnu dot org
- Cc: amylaar at redhat dot com;, aoliva at redhat dot com
- Date: 11 Dec 2001 15:54:56 -0000
- Subject: optimization/5075: sh-elf target optimize worse, save pr in leaf function
- Reply-to: bero at bekkoame dot ne dot jp
>Number: 5075
>Category: optimization
>Synopsis: sh-elf target optimize worse, save pr in leaf function
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: unassigned
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Tue Dec 11 08:06:00 PST 2001
>Closed-Date:
>Last-Modified:
>Originator: Takahiro Ishio
>Release: 3.0.2
>Organization:
>Environment:
gcc-3.0.2,cross target for sh-elf,host cygwin on windows2000
Configured with: ../gcc-3.0.2/configure --target=sh-elf --with-gnu-as --with-gnu
-ld --enable-language=c,c++ --with-newlib
>Description:
sh-elf target optimize worse,
save pr in leaf function
for example,-O2 -fomit-frame-pointer
int func(int a,int b)
{
return a+b;
}
3.0.1 or before
mov r4,r0
rts
add r5,r0
3.0.2
sts.l pr,@-r15
mov r4,r0
lds.l @r15+,pr
rts
add r5,r0
>How-To-Repeat:
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted: