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(expand_inline_function): Use single_set when appropriate.

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Delete insn that sets static_chain_incoming_rtx before its use.
(subst_constants): Treat virtual reg as constant.

From-SVN: r7910
This commit is contained in:
Richard Kenner 1994-08-12 18:59:51 -04:00
parent 426749e8af
commit c9734bb90e
1 changed files with 31 additions and 13 deletions
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44
gcc/integrate.c
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@ -1645,7 +1645,7 @@ expand_inline_function (fndecl, parms, target, ignore, type, structure_value_add
for (insn = insns; insn; insn = NEXT_INSN (insn))
{
rtx copy, pattern;
rtx copy, pattern, set;
map->orig_asm_operands_vector = 0;
@ -1653,6 +1653,7 @@ expand_inline_function (fndecl, parms, target, ignore, type, structure_value_add
{
case INSN:
pattern = PATTERN (insn);
set = single_set (insn);
copy = 0;
if (GET_CODE (pattern) == USE
&& GET_CODE (XEXP (pattern, 0)) == REG
@ -1664,33 +1665,47 @@ expand_inline_function (fndecl, parms, target, ignore, type, structure_value_add
/* Ignore setting a function value that we don't want to use. */
if (map->inline_target == 0
&& GET_CODE (pattern) == SET
&& GET_CODE (SET_DEST (pattern)) == REG
&& REG_FUNCTION_VALUE_P (SET_DEST (pattern)))
&& set != 0
&& GET_CODE (SET_DEST (set)) == REG
&& REG_FUNCTION_VALUE_P (SET_DEST (set)))
{
if (volatile_refs_p (SET_SRC (pattern)))
if (volatile_refs_p (SET_SRC (set)))
{
rtx new_set;
/* If we must not delete the source,
load it into a new temporary. */
copy = emit_insn (copy_rtx_and_substitute (pattern, map));
SET_DEST (PATTERN (copy))
= gen_reg_rtx (GET_MODE (SET_DEST (PATTERN (copy))));
new_set = single_set (copy);
if (new_set == 0)
abort ();
SET_DEST (new_set)
= gen_reg_rtx (GET_MODE (SET_DEST (new_set)));
}
else
break;
}
/* If this is setting the static chain rtx, omit it. */
else if (static_chain_value != 0
&& set != 0
&& GET_CODE (SET_DEST (set)) == REG
&& rtx_equal_p (SET_DEST (set),
static_chain_incoming_rtx))
break;
/* If this is setting the static chain pseudo, set it from
the value we want to give it instead. */
else if (static_chain_value != 0
&& GET_CODE (pattern) == SET
&& rtx_equal_p (SET_SRC (pattern),
&& set != 0
&& rtx_equal_p (SET_SRC (set),
static_chain_incoming_rtx))
{
rtx newdest = copy_rtx_and_substitute (SET_DEST (pattern), map);
copy = emit_insn (gen_rtx (SET, VOIDmode, newdest,
static_chain_value));
rtx newdest = copy_rtx_and_substitute (SET_DEST (set), map);
copy = emit_move_insn (newdest, static_chain_value);
static_chain_value = 0;
}
else
@ -2590,6 +2605,9 @@ subst_constants (loc, insn, map)
/* If storing a recognizable value save it for later recording. */
if ((map->num_sets < MAX_RECOG_OPERANDS)
&& (CONSTANT_P (src)
|| (GET_CODE (src) == REG
&& REGNO (src) >= FIRST_VIRTUAL_REGISTER
&& REGNO (src) <= LAST_VIRTUAL_REGISTER)
|| (GET_CODE (src) == PLUS
&& GET_CODE (XEXP (src, 0)) == REG
&& REGNO (XEXP (src, 0)) >= FIRST_VIRTUAL_REGISTER