target/8366: sparc-sun-solaris2.7 C testsuite failure w/-m64 -fpic -O in execute/loop-2d.c
ghazi@caip.rutgers.edu
ghazi@caip.rutgers.edu
Sat Oct 26 12:31:00 GMT 2002
>Number: 8366
>Category: target
>Synopsis: sparc-sun-solaris2.7 C testsuite failure w/-m64 -fpic -O in execute/loop-2d.c
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: unassigned
>State: open
>Class: wrong-code
>Submitter-Id: net
>Arrival-Date: Sat Oct 26 09:46:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator: Kaveh Ghazi
>Release: gcc version 3.2.1 20021025 (prerelease)
>Organization:
>Environment:
sparc-sun-solaris2.7 or sparcv9-sun-solaris2.7
>Description:
I'm getting an abort with the 3.2.x prerelease on sparc-solaris2.7 running the binary from execute/loop-2d.c when compiled with -m64 -fpic -O. I also get the failure on sparcv9-solaris2.7 with just -fpic -O. The abort goes away if I remove any of those flags or change the optimization level. I've pasted the .s file in case that helps catch it by eye, it's not too long. This abort also occurs in the 3.2 release as well as the 3.1.1 release so I can't say it's a regression, however on sparcv9 it merely requires -fpic -O so I think it's worth a quick look before the next 3.2.x release if time permits and the fix is safe.
.file "loop-2d.c"
.section ".text"
.align 4
.LLGETPC0:
retl
add %o7, %l7, %l7
.align 4
.global f
.type f,#function
.proc 04
f:
!#PROLOGUE# 0
save %sp, -192, %sp
sethi %hi(_GLOBAL_OFFSET_TABLE_-4), %l7
call .LLGETPC0
add %l7, %lo(_GLOBAL_OFFSET_TABLE_+4), %l7
sllx %i0, 2, %i2
ldx [%l7+a], %i1
add %i2, %i1, %i2
add %i0, -1, %i1
cmp %i1, -1
be,pn %icc, .LL8
ld [%l7+a+4], %g4
.LL6:
add %i2, -4, %i2
sll %i1, 1, %i0
add %i0, %i1, %i0
add %i0, %g4, %i0
add %i1, -1, %i1
cmp %i1, -1
bne,pt %icc, .LL6
st %i0, [%i2]
.LL8:
nop
return %i7+8
nop
.LLfe1:
.size f,.LLfe1-f
.align 4
.global main
.type main,#function
.proc 04
main:
!#PROLOGUE# 0
save %sp, -192, %sp
sethi %hi(_GLOBAL_OFFSET_TABLE_-4), %l7
call .LLGETPC0
add %l7, %lo(_GLOBAL_OFFSET_TABLE_+4), %l7
ldx [%l7+a], %l0
st %g0, [%l0+4]
st %g0, [%l0]
call f, 0
mov 2, %o0
ld [%l0], %o1
cmp %o1, %l0
bne,pt %icc, .LL11
add %o1, 3, %o1
ld [%l0+4], %o0
cmp %o0, %o1
be,pn %icc, .LL10
nop
.LL11:
call abort, 0
nop
.LL10:
call exit, 0
mov 0, %o0
nop
.LLfe2:
.size main,.LLfe2-main
.common a,8,4
.ident "GCC: (GNU) 3.2.1 20021025 (prerelease)"
>How-To-Repeat:
Compile with:
cc1 -fpreprocessed loop-2d.i -mptr64 -mstack-bias -mno-v8plus -mcpu=v9 -quiet -dumpbase loop-2d.c -m64 -O -version -fpic -o loop-2d.s
/usr/ccs/bin/as -V -Qy -s -K PIC -xarch=v9 -o loop-2d.o loop-2d.s
collect2 -V -Y P,/usr/lib/sparcv9 -Qy /tmp/kg/321/build/gcc/sparcv9/crt1.o /tmp/kg/321/build/gcc/sparcv9/crti.o /usr/ccs/lib/sparcv9/values-Xa.o /tmp/kg/321/build/gcc/sparcv9/crtbegin.o -L/tmp/kg/321/build/gcc/sparcv9 -L/tmp/kg/321/build/gcc -L/usr/ccs/bin/sparcv9 -L/usr/ccs/bin -L/usr/ccs/lib/sparcv9 -L/usr/ccs/lib -L/lib/sparcv9 -L/usr/lib/sparcv9 loop-2d.o -lgcc -lgcc_eh -lc -lgcc -lgcc_eh -lc /tmp/kg/321/build/gcc/sparcv9/crtend.o /tmp/kg/321/build/gcc/sparcv9/crtn.o
then run the binary file
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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