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reload1.c (eliminate_regs_1): If insn is DEBUG_INSN, avoid any modifications outside of the DEBUG_INSN.

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* reload1.c (eliminate_regs_1): If insn is DEBUG_INSN, avoid any
	modifications outside of the DEBUG_INSN.  Accept CLOBBERs inside
	of DEBUG_INSNs.
	(eliminate_regs_in_insn): Eliminate regs even in DEBUG_INSNs.

From-SVN: r156693
This commit is contained in:
Jakub Jelinek 2010-02-11 10:17:54 +01:00 committed by Jakub Jelinek
parent d2d36740c2
commit 8f6aedbafe
2 changed files with 17 additions and 4 deletions
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5
gcc/ChangeLog
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@ -1,5 +1,10 @@
2010-02-11 Jakub Jelinek <jakub@redhat.com>
* reload1.c (eliminate_regs_1): If insn is DEBUG_INSN, avoid any
modifications outside of the DEBUG_INSN. Accept CLOBBERs inside
of DEBUG_INSNs.
(eliminate_regs_in_insn): Eliminate regs even in DEBUG_INSNs.
* dwarf2out.c (mem_loc_descriptor) <case MEM>: Use DW_OP_deref_size
if MEM's mode size isn't DWARF2_ADDR_SIZE.
(mem_loc_descriptor) <do_scompare>: Allow also VOIDmode arguments.

16
gcc/reload1.c
View File

@ -1,6 +1,6 @@
/* Reload pseudo regs into hard regs for insns that require hard regs.
Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
Free Software Foundation, Inc.
This file is part of GCC.
@ -2570,7 +2570,7 @@ eliminate_regs_1 (rtx x, enum machine_mode mem_mode, rtx insn,
else if (reg_renumber && reg_renumber[regno] < 0
&& reg_equiv_invariant && reg_equiv_invariant[regno])
{
if (may_use_invariant)
if (may_use_invariant || (insn && DEBUG_INSN_P (insn)))
return eliminate_regs_1 (copy_rtx (reg_equiv_invariant[regno]),
mem_mode, insn, true);
/* There exists at least one use of REGNO that cannot be
@ -2685,9 +2685,11 @@ eliminate_regs_1 (rtx x, enum machine_mode mem_mode, rtx insn,
if (ep->from_rtx == XEXP (x, 0) && ep->can_eliminate)
{
if (! mem_mode
/* Refs inside notes don't count for this purpose. */
/* Refs inside notes or in DEBUG_INSNs don't count for
this purpose. */
&& ! (insn != 0 && (GET_CODE (insn) == EXPR_LIST
|| GET_CODE (insn) == INSN_LIST)))
|| GET_CODE (insn) == INSN_LIST
|| DEBUG_INSN_P (insn))))
ep->ref_outside_mem = 1;
return
@ -2863,6 +2865,9 @@ eliminate_regs_1 (rtx x, enum machine_mode mem_mode, rtx insn,
return x;
case CLOBBER:
gcc_assert (insn && DEBUG_INSN_P (insn));
break;
case ASM_OPERANDS:
case SET:
gcc_unreachable ();
@ -3199,6 +3204,9 @@ eliminate_regs_in_insn (rtx insn, int replace)
|| GET_CODE (PATTERN (insn)) == ADDR_DIFF_VEC
|| GET_CODE (PATTERN (insn)) == ASM_INPUT
|| DEBUG_INSN_P (insn));
if (DEBUG_INSN_P (insn))
INSN_VAR_LOCATION_LOC (insn)
= eliminate_regs (INSN_VAR_LOCATION_LOC (insn), VOIDmode, insn);
return 0;
}