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emit-rtl.c (set_mem_attributes_minus_bitpos): Don't kill previous MEM_VOLATILE in REF.

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* emit-rtl.c (set_mem_attributes_minus_bitpos): Don't kill
	previous MEM_VOLATILE in REF.
	* function.c (fixup_var_refs): Save volatile_ok and set to 1.
	* expr.c (emit_block_move_via_movstr): Save and restore volatile_ok.

From-SVN: r77718
This commit is contained in:
Richard Kenner 2004-02-12 18:25:09 +00:00 • committed by Richard Kenner
parent 2e9a1f6b05
commit a5e9c81033
4 changed files with 17 additions and 3 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2004-02-12 Richard Kenner <kenner@vlsi1.ultra.nyu.edu>
* emit-rtl.c (set_mem_attributes_minus_bitpos): Don't kill
previous MEM_VOLATILE in REF.
* function.c (fixup_var_refs): Save volatile_ok and set to 1.
* expr.c (emit_block_move_via_movstr): Save and restore volatile_ok.
2004-02-12 Gunther Nikl <gni@gecko.de>
* config.gcc: Restore support for m68k-openbsd.

2
gcc/emit-rtl.c
View file

@ -1479,7 +1479,7 @@ set_mem_attributes_minus_bitpos (rtx ref, tree t, int objectp,
front-end routine) and use it. */
alias = get_alias_set (t);
MEM_VOLATILE_P (ref) = TYPE_VOLATILE (type);
MEM_VOLATILE_P (ref) |= TYPE_VOLATILE (type);
MEM_IN_STRUCT_P (ref) = AGGREGATE_TYPE_P (type);
RTX_UNCHANGING_P (ref)
|= ((lang_hooks.honor_readonly

5
gcc/expr.c
View file

@ -1417,6 +1417,7 @@ static bool
emit_block_move_via_movstr (rtx x, rtx y, rtx size, unsigned int align)
{
rtx opalign = GEN_INT (align / BITS_PER_UNIT);
int save_volatile_ok = volatile_ok;
enum machine_mode mode;
/* Since this is a move insn, we don't care about volatility. */
@ -1466,7 +1467,7 @@ emit_block_move_via_movstr (rtx x, rtx y, rtx size, unsigned int align)
if (pat)
{
emit_insn (pat);
volatile_ok = 0;
volatile_ok = save_volatile_ok;
return true;
}
else
@ -1474,7 +1475,7 @@ emit_block_move_via_movstr (rtx x, rtx y, rtx size, unsigned int align)
}
}
volatile_ok = 0;
volatile_ok = save_volatile_ok;
return false;
}

6
gcc/function.c
View file

@ -1503,6 +1503,7 @@ fixup_var_refs (rtx var, enum machine_mode promoted_mode, int unsignedp,
rtx first_insn = get_insns ();
struct sequence_stack *stack = seq_stack;
tree rtl_exps = rtl_expr_chain;
int save_volatile_ok = volatile_ok;
/* If there's a hash table, it must record all uses of VAR. */
if (ht)
@ -1514,6 +1515,9 @@ fixup_var_refs (rtx var, enum machine_mode promoted_mode, int unsignedp,
return;
}
/* Volatile is valid in MEMs because all we're doing in changing the
address inside. */
volatile_ok = 1;
fixup_var_refs_insns (first_insn, var, promoted_mode, unsignedp,
stack == 0, may_share);
@ -1541,6 +1545,8 @@ fixup_var_refs (rtx var, enum machine_mode promoted_mode, int unsignedp,
end_sequence ();
}
}
volatile_ok = save_volatile_ok;
}
/* REPLACEMENTS is a pointer to a list of the struct fixup_replacement and X is