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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/56560] [4.6/4.7 regression] vzeroupper clobbers argument with AVX
Date: Fri, 08 Mar 2013 17:23:00 -0000 [thread overview]
Message-ID: <bug-56560-4-uo3svVVMHt@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-56560-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56560
--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> 2013-03-08 17:21:18 UTC ---
The caller info is lost by
(gdb) bt
#0 init_cumulative_args (cum=0x7fffffffc3f0, fntype=0x7ffff1472e70,
libname=0x0, fndecl=0x0, caller=1)
at /export/gnu/import/git/gcc-release/gcc/config/i386/i386.c:5562
#1 0x0000000000640011 in block_move_libcall_safe_for_call_parm ()
at /export/gnu/import/git/gcc-release/gcc/expr.c:1244
#2 0x000000000063fc07 in emit_block_move_hints (x=0x7ffff1470780,
y=0x7ffff1470750, size=0x7ffff133a530, method=BLOCK_OP_CALL_PARM,
expected_align=0, expected_size=-1)
at /export/gnu/import/git/gcc-release/gcc/expr.c:1139
#3 0x000000000063ff3c in emit_block_move (x=0x7ffff1470780, y=0x7ffff1470750,
size=0x7ffff133a530, method=BLOCK_OP_CALL_PARM)
at /export/gnu/import/git/gcc-release/gcc/expr.c:1206
#4 0x000000000064693a in emit_push_insn (x=0x7ffff1470750, mode=BLKmode,
type=0x7ffff1472690, size=0x7ffff133a530, align=64, partial=0, reg=0x0,
extra=4, args_addr=0x7ffff1334560, args_so_far=0x7ffff133a470,
reg_parm_stack_space=0, alignment_pad=0x7ffff133a470)
at /export/gnu/import/git/gcc-release/gcc/expr.c:4116
#5 0x000000000056d1ad in store_one_arg (arg=0x7fffffffc760,
argblock=0x7ffff1334560, flags=0, variable_size=0, reg_parm_stack_space=0)
at /export/gnu/import/git/gcc-release/gcc/calls.c:4646
#6 0x0000000000568b51 in expand_call (exp=0x7ffff1333cb0,
target=0x7ffff1461f00, ignore=0)
at /export/gnu/import/git/gcc-release/gcc/calls.c:3023
when storing struct S on stack. This patch:
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index c1f6c88..8005207 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -5562,7 +5562,7 @@ init_cumulative_args (CUMULATIVE_ARGS *cum, /* Argument
info to initialize */
memset (cum, 0, sizeof (*cum));
/* Initialize for the current callee. */
- if (caller)
+ if (caller && fndecl)
{
cfun->machine->callee_pass_avx256_p = false;
cfun->machine->callee_return_avx256_p = false;
fixes it.
next prev parent reply other threads:[~2013-03-08 17:23 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-07 9:48 [Bug target/56560] New: [4.7 " ebotcazou at gcc dot gnu.org
2013-03-07 10:10 ` [Bug target/56560] [4.6/4.7 " rguenth at gcc dot gnu.org
2013-03-07 10:18 ` ebotcazou at gcc dot gnu.org
2013-03-08 9:24 ` ubizjak at gmail dot com
2013-03-08 17:23 ` hjl.tools at gmail dot com [this message]
2013-03-10 15:51 ` ebotcazou at gcc dot gnu.org
2013-03-11 19:35 ` hjl.tools at gmail dot com
2013-03-12 11:37 ` ebotcazou at gcc dot gnu.org
2013-03-12 16:49 ` hjl.tools at gmail dot com
2013-03-12 17:08 ` ebotcazou at gcc dot gnu.org
2013-04-03 10:14 ` rguenth at gcc dot gnu.org
2013-04-12 15:18 ` [Bug target/56560] [4.7 " jakub at gcc dot gnu.org
2013-05-06 14:42 ` ebotcazou at gcc dot gnu.org
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