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[Bug middle-end/30905] [4.3 Regression] Fails to cross-jump
- From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 5 Jul 2007 08:41:11 -0000
- Subject: [Bug middle-end/30905] [4.3 Regression] Fails to cross-jump
- References: <bug-30905-10053@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #6 from rguenth at gcc dot gnu dot org 2007-07-05 08:41 -------
For 4.1.x I get
kernel:
.LFB2:
subq $8, %rsp
.LCFI0:
movl $1, %edi
call gen_int
movl a(%rip), %eax
movl %eax, %edx
andl $3, %edx
addl %edx, %eax
movl %eax, a(%rip)
movl b(%rip), %eax
movl %eax, %edx
orl $3, %edx
addl %edx, %eax
movl %eax, b(%rip)
movl a+4(%rip), %eax
movl %eax, %edx
andl $3, %edx
addl %edx, %eax
movl %eax, a+4(%rip)
movl b+4(%rip), %eax
movl %eax, %edx
orl $3, %edx
addl %edx, %eax
movl %eax, b+4(%rip)
addq $8, %rsp
ret
while with trunk we have
kernel:
.LFB2:
subq $8, %rsp
.LCFI0:
movl $1, %edi
call gen_int
testl %eax, %eax
je .L2
movl a(%rip), %edx
movl %edx, %eax
andl $3, %eax
addl %edx, %eax
movl b(%rip), %edx
movl %eax, a(%rip)
movl %edx, %eax
orl $3, %eax
addl %edx, %eax
movl %eax, b(%rip)
.L7:
movl a+4(%rip), %edx
movl %edx, %eax
andl $3, %eax
addl %edx, %eax
movl b+4(%rip), %edx
movl %eax, a+4(%rip)
movl %edx, %eax
orl $3, %eax
addl %edx, %eax
movl %eax, b+4(%rip)
addq $8, %rsp
ret
.p2align 4,,10
.p2align 3
.L2:
movl a(%rip), %edx
movl %edx, %eax
andl $3, %eax
addl %edx, %eax
movl b(%rip), %edx
movl %eax, a(%rip)
movl %edx, %eax
orl $3, %eax
addl %edx, %eax
movl %eax, b(%rip)
jmp .L7
.LFE2:
so, no, this is not yet fixed.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30905