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sh.c (find_barrier): Don't emit a CP inside the GP setting.

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* config/sh/sh.c (find_barrier): Don't emit a CP inside the GP setting.

From-SVN: r156648
This commit is contained in:
Christian Bruel 2010-02-10 11:08:01 +01:00 committed by Christian Bruel
parent cbb1ab1040
commit e938feb428
2 changed files with 24 additions and 1 deletions
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4
gcc/ChangeLog
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@ -1,3 +1,7 @@
2010-02-10 Christian Bruel <christian.bruel@st.com>
* config/sh/sh.c (find_barrier): Don't emit a CP inside the GP setting.
2010-02-10 Jakub Jelinek <jakub@redhat.com>
* builtins.c (set_builtin_user_assembler_name): Also handle

21
gcc/config/sh/sh.c
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@ -1,6 +1,7 @@
/* Output routines for GCC for Renesas / SuperH SH.
Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
Free Software Foundation, Inc.
Contributed by Steve Chamberlain (sac@cygnus.com).
Improved by Jim Wilson (wilson@cygnus.com).
@ -4392,6 +4393,7 @@ find_barrier (int num_mova, rtx mova, rtx from)
int si_limit;
int hi_limit;
rtx orig = from;
rtx last_got = NULL_RTX;
/* For HImode: range is 510, add 4 because pc counts from address of
second instruction after this one, subtract 2 for the jump instruction
@ -4482,6 +4484,16 @@ find_barrier (int num_mova, rtx mova, rtx from)
dst = SET_DEST (pat);
mode = GET_MODE (dst);
/* GOT pcrelat setting comes in pair of
mova .L8,r0
mov.l .L8,r12
instructions. (plus add r0,r12).
Remember if we see one without the other. */
if (GET_CODE (src) == UNSPEC && PIC_ADDR_P (XVECEXP (src, 0, 0)))
last_got = last_got ? NULL_RTX : from;
else if (PIC_ADDR_P (src))
last_got = last_got ? NULL_RTX : from;
/* We must explicitly check the mode, because sometimes the
front end will generate code to load unsigned constants into
HImode targets without properly sign extending them. */
@ -4628,6 +4640,13 @@ find_barrier (int num_mova, rtx mova, rtx from)
else
from = PREV_INSN (from);
/* Don't emit a constant table int the middle of global pointer setting,
since that that would move the addressing base GOT into another table.
We need the first mov instruction before the _GLOBAL_OFFSET_TABLE_
in the pool anyway, so just move up the whole constant pool. */
if (last_got)
from = PREV_INSN (last_got);
/* Walk back to be just before any jump or label.
Putting it before a label reduces the number of times the branch
around the constant pool table will be hit. Putting it before