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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/59644] [4.9 Regression] r206243 miscompiles Linux kernel
Date: Tue, 31 Dec 2013 08:26:00 -0000 [thread overview]
Message-ID: <bug-59644-4-rvcJIQpy1O@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-59644-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59644
--- Comment #6 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
linux % diff -u kernel/printk/printk.o /var/tmp/linux/kernel/printk/printk.o
--- kernel/printk/printk.o 2013-12-31 09:23:45.569490147 +0100
+++ /var/tmp/linux/kernel/printk/printk.o 2013-12-31 09:23:22.066697479
+0100
@@ -2517,19 +2517,16 @@
printk_emit:
pushq %rbp
movq %rsp, %rbp
- pushq %r10
- leaq -56(%rbp), %rax
- leaq 16(%rbp), %r10
subq $72, %rsp
+ leaq 16(%rbp), %r10
movq %r9, -16(%rbp)
+ leaq -56(%rbp), %rax
leaq -80(%rbp), %r9
- movq %r10, -72(%rbp)
movl $40, -80(%rbp)
+ movq %r10, -72(%rbp)
movq %rax, -64(%rbp)
call vprintk_emit
- addq $72, %rsp
- popq %r10
- popq %rbp
+ leave
ret
.size printk_emit, .-printk_emit
.LCOLDE44:
@@ -2680,28 +2677,25 @@
printk:
pushq %rbp
movq %rsp, %rbp
- pushq %r10
- leaq -56(%rbp), %rax
- leaq 16(%rbp), %r10
subq $72, %rsp
+ leaq 16(%rbp), %r10
movq %rsi, -48(%rbp)
movq %rdx, -40(%rbp)
movq %rcx, -32(%rbp)
movq %r8, -24(%rbp)
- xorl %ecx, %ecx
+ leaq -56(%rbp), %rax
movq %r9, -16(%rbp)
movq %rdi, %r8
leaq -80(%rbp), %r9
+ xorl %ecx, %ecx
xorl %edx, %edx
orl $-1, %esi
xorl %edi, %edi
- movq %r10, -72(%rbp)
movl $8, -80(%rbp)
+ movq %r10, -72(%rbp)
movq %rax, -64(%rbp)
call vprintk_emit
- addq $72, %rsp
- popq %r10
- popq %rbp
+ leave
ret
.size printk, .-printk
.LCOLDE47:
@@ -4052,7 +4046,6 @@
printk_sched:
pushq %rbp
movq %rsp, %rbp
- pushq %r10
pushq %rbx
leaq 16(%rbp), %r10
subq $80, %rsp
@@ -4105,7 +4098,6 @@
#NO_APP
addq $80, %rsp
popq %rbx
- popq %r10
popq %rbp
ret
.size printk_sched, .-printk_sched
@@ -4691,26 +4683,23 @@
dump_stack_set_arch_desc:
pushq %rbp
movq %rsp, %rbp
- pushq %r10
- leaq -56(%rbp), %rax
- leaq 16(%rbp), %r10
subq $72, %rsp
+ leaq 16(%rbp), %r10
movq %rsi, -48(%rbp)
movq %rdx, -40(%rbp)
movq %rcx, -32(%rbp)
+ leaq -56(%rbp), %rax
movq %rdi, %rdx
leaq -80(%rbp), %rcx
movl $128, %esi
movq $dump_stack_arch_desc_str, %rdi
- movq %r10, -72(%rbp)
movq %r8, -24(%rbp)
movq %r9, -16(%rbp)
movl $8, -80(%rbp)
+ movq %r10, -72(%rbp)
movq %rax, -64(%rbp)
call vsnprintf
- addq $72, %rsp
- popq %r10
- popq %rbp
+ leave
ret
.size dump_stack_set_arch_desc, .-dump_stack_set_arch_desc
.LCOLDE92:
next prev parent reply other threads:[~2013-12-31 8:26 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-30 23:03 [Bug tree-optimization/59644] New: " trippels at gcc dot gnu.org
2013-12-30 23:43 ` [Bug tree-optimization/59644] " jakub at gcc dot gnu.org
2013-12-31 8:17 ` trippels at gcc dot gnu.org
2013-12-31 8:18 ` trippels at gcc dot gnu.org
2013-12-31 8:19 ` trippels at gcc dot gnu.org
2013-12-31 8:20 ` trippels at gcc dot gnu.org
2013-12-31 8:26 ` trippels at gcc dot gnu.org [this message]
2013-12-31 11:47 ` jakub at gcc dot gnu.org
2013-12-31 13:03 ` trippels at gcc dot gnu.org
2014-01-06 8:21 ` trippels at gcc dot gnu.org
2014-01-06 8:48 ` trippels at gcc dot gnu.org
2014-01-06 9:08 ` jakub at gcc dot gnu.org
2014-01-06 9:17 ` trippels at gcc dot gnu.org
2014-01-06 9:26 ` jakub at gcc dot gnu.org
2014-01-06 9:36 ` trippels at gcc dot gnu.org
2014-01-06 10:00 ` trippels at gcc dot gnu.org
2014-01-06 10:04 ` trippels at gcc dot gnu.org
2014-01-06 10:09 ` hjl.tools at gmail dot com
2014-01-06 10:12 ` jakub at gcc dot gnu.org
2014-01-06 10:21 ` trippels at gcc dot gnu.org
2014-01-06 11:28 ` jakub at gcc dot gnu.org
2014-01-06 11:55 ` jakub at gcc dot gnu.org
2014-01-06 13:39 ` [Bug target/59644] " jakub at gcc dot gnu.org
2014-01-06 21:38 ` jakub at gcc dot gnu.org
2014-01-06 21:39 ` jakub at gcc dot gnu.org
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