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rtlanal.c (dead_or_set_regno_p): Ignore REG_DEAD notes after reload completes.

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* rtlanal.c (dead_or_set_regno_p): Ignore REG_DEAD notes after
        reload completes.
        * genattrtab.c (reload_completed): Define.
        * m32r.md, mips.md, mn10200.md, mn10300.md, pyr.md: Remove obsolete
        comments.

From-SVN: r17542
This commit is contained in:
Mike Stump 1998-01-28 19:21:54 +00:00 committed by Jeff Law
parent d2c92f5a43
commit 21ca87b81b
8 changed files with 35 additions and 54 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
gcc/ChangeLog
View File

@ -1,3 +1,12 @@
1998-01-28 Mike Stump <mrs@wrs.com>
* rtlanal.c (dead_or_set_regno_p): Ignore REG_DEAD notes after
reload completes.
* genattrtab.c (reload_completed): Define.
* m32r.md, mips.md, mn10200.md, mn10300.md, pyr.md: Remove obsolete
comments.
Wed Jan 28 20:11:06 1998 J"orn Rennecke <amylaar@cygnus.co.uk>
* reload.c (push_reload): If WORD_REGISTER_OPERATIONS, reload the

10
gcc/config/m32r/m32r.md
View File

@ -379,8 +379,6 @@
{
/* Try to use auto-inc addressing if we can. */
if (GET_CODE (XEXP (operands[1], 0)) == REG
/* ??? This is WRONG, dead_or_set_p cannot be used after reload
because the REG_DEAD notes are not maintained after reload. */
&& dead_or_set_p (insn, XEXP (operands[1], 0)))
{
operands[1] = XEXP (operands[1], 0);
@ -391,8 +389,6 @@
case 3 :
/* Try to use auto-inc addressing if we can. */
if (GET_CODE (XEXP (operands[0], 0)) == REG
/* ??? This is WRONG, dead_or_set_p cannot be used after reload
because the REG_DEAD notes are not maintained after reload. */
&& dead_or_set_p (insn, XEXP (operands[0], 0)))
{
operands[0] = XEXP (operands[0], 0);
@ -534,8 +530,6 @@
{
/* Try to use auto-inc addressing if we can. */
if (GET_CODE (XEXP (operands[1], 0)) == REG
/* ??? This is WRONG, dead_or_set_p cannot be used after reload
because the REG_DEAD notes are not maintained after reload. */
&& dead_or_set_p (insn, XEXP (operands[1], 0)))
{
operands[1] = XEXP (operands[1], 0);
@ -546,8 +540,6 @@
case 3 :
/* Try to use auto-inc addressing if we can. */
if (GET_CODE (XEXP (operands[0], 0)) == REG
/* ??? This is WRONG, dead_or_set_p cannot be used after reload
because the REG_DEAD notes are not maintained after reload. */
&& dead_or_set_p (insn, XEXP (operands[0], 0)))
{
operands[0] = XEXP (operands[0], 0);
@ -1471,8 +1463,6 @@
[(set (mem:SI (plus:SI (match_operand:SI 0 "register_operand" "r")
(const_int 4)))
(match_operand:SI 1 "register_operand" "r"))]
;; ??? This is WRONG, dead_or_set_p cannot be used after reload
;; because the REG_DEAD notes are not maintained after reload.
"dead_or_set_p (insn, operands[0])"
"st %1,@+%0"
[(set_attr "type" "store")

8
gcc/config/mips/mips.md
View File

@ -9771,8 +9771,6 @@ move\\t%0,%z4\\n\\
"TARGET_MIPS16
&& GET_CODE (operands[0]) == REG
&& REGNO (operands[0]) == 24
;; ??? This is WRONG, dead_or_set_p cannot be used after reload
;; because the REG_DEAD notes are not maintained after reload.
&& dead_or_set_p (insn, operands[0])
&& GET_CODE (operands[1]) == REG
&& M16_REG_P (REGNO (operands[1]))"
@ -9798,8 +9796,6 @@ move\\t%0,%z4\\n\\
"TARGET_MIPS16 && TARGET_64BIT
&& GET_CODE (operands[0]) == REG
&& REGNO (operands[0]) == 24
;; ??? This is WRONG, dead_or_set_p cannot be used after reload
;; because the REG_DEAD notes are not maintained after reload.
&& dead_or_set_p (insn, operands[0])
&& GET_CODE (operands[1]) == REG
&& M16_REG_P (REGNO (operands[1]))"
@ -9831,8 +9827,6 @@ move\\t%0,%z4\\n\\
&& REGNO (operands[1]) == 24
&& GET_CODE (operands[0]) == REG
&& M16_REG_P (REGNO (operands[0]))
;; ??? This is WRONG, dead_or_set_p cannot be used after reload
;; because the REG_DEAD notes are not maintained after reload.
&& dead_or_set_p (insn, operands[0])"
"*
{
@ -9858,8 +9852,6 @@ move\\t%0,%z4\\n\\
&& REGNO (operands[1]) == 24
&& GET_CODE (operands[0]) == REG
&& M16_REG_P (REGNO (operands[0]))
;; ??? This is WRONG, dead_or_set_p cannot be used after reload
;; because the REG_DEAD notes are not maintained after reload.
&& dead_or_set_p (insn, operands[0])"
"*
{

16
gcc/config/mn10200/mn10200.md
View File

@ -1888,8 +1888,6 @@
(set (pc) (if_then_else (ge (cc0) (const_int 0))
(match_operand 1 "" "")
(pc)))]
;; ??? This is WRONG, dead_or_set_p cannot be used after reload
;; because the REG_DEAD notes are not maintained after reload.
"dead_or_set_p (ins1, operands[0]) && REG_OK_FOR_INDEX_P (operands[0])"
"add %0,%0\;bcc %1"
[(set_attr "cc" "clobber")])
@ -1899,8 +1897,6 @@
(set (pc) (if_then_else (lt (cc0) (const_int 0))
(match_operand 1 "" "")
(pc)))]
;; ??? This is WRONG, dead_or_set_p cannot be used after reload
;; because the REG_DEAD notes are not maintained after reload.
"dead_or_set_p (ins1, operands[0]) && REG_OK_FOR_INDEX_P (operands[0])"
"add %0,%0\;bcs %1"
[(set_attr "cc" "clobber")])
@ -1910,8 +1906,6 @@
(set (pc) (if_then_else (ge (cc0) (const_int 0))
(pc)
(match_operand 1 "" "")))]
;; ??? This is WRONG, dead_or_set_p cannot be used after reload
;; because the REG_DEAD notes are not maintained after reload.
"dead_or_set_p (ins1, operands[0]) && REG_OK_FOR_INDEX_P (operands[0])"
"add %0,%0\;bcs %1"
[(set_attr "cc" "clobber")])
@ -1921,8 +1915,6 @@
(set (pc) (if_then_else (lt (cc0) (const_int 0))
(pc)
(match_operand 1 "" "")))]
;; ??? This is WRONG, dead_or_set_p cannot be used after reload
;; because the REG_DEAD notes are not maintained after reload.
"dead_or_set_p (ins1, operands[0]) && REG_OK_FOR_INDEX_P (operands[0])"
"add %0,%0\;bcc %1"
[(set_attr "cc" "clobber")])
@ -1932,8 +1924,6 @@
(set (pc) (if_then_else (ge (cc0) (const_int 0))
(match_operand 1 "" "")
(pc)))]
;; ??? This is WRONG, dead_or_set_p cannot be used after reload
;; because the REG_DEAD notes are not maintained after reload.
"dead_or_set_p (ins1, operands[0]) && REG_OK_FOR_INDEX_P (operands[0])"
"add %0,%0\;bccx %1"
[(set_attr "cc" "clobber")])
@ -1943,8 +1933,6 @@
(set (pc) (if_then_else (lt (cc0) (const_int 0))
(match_operand 1 "" "")
(pc)))]
;; ??? This is WRONG, dead_or_set_p cannot be used after reload
;; because the REG_DEAD notes are not maintained after reload.
"dead_or_set_p (ins1, operands[0]) && REG_OK_FOR_INDEX_P (operands[0])"
"add %0,%0\;bcsx %1"
[(set_attr "cc" "clobber")])
@ -1954,8 +1942,6 @@
(set (pc) (if_then_else (ge (cc0) (const_int 0))
(pc)
(match_operand 1 "" "")))]
;; ??? This is WRONG, dead_or_set_p cannot be used after reload
;; because the REG_DEAD notes are not maintained after reload.
"dead_or_set_p (ins1, operands[0]) && REG_OK_FOR_INDEX_P (operands[0])"
"add %0,%0\;bcsx %1"
[(set_attr "cc" "clobber")])
@ -1965,8 +1951,6 @@
(set (pc) (if_then_else (lt (cc0) (const_int 0))
(pc)
(match_operand 1 "" "")))]
;; ??? This is WRONG, dead_or_set_p cannot be used after reload
;; because the REG_DEAD notes are not maintained after reload.
"dead_or_set_p (ins1, operands[0]) && REG_OK_FOR_INDEX_P (operands[0])"
"add %0,%0\;bccx %1"
[(set_attr "cc" "clobber")])

8
gcc/config/mn10300/mn10300.md
View File

@ -1397,8 +1397,6 @@
(set (pc) (if_then_else (ge (cc0) (const_int 0))
(match_operand 1 "" "")
(pc)))]
;; ??? This is WRONG, dead_or_set_p cannot be used after reload
;; because the REG_DEAD notes are not maintained after reload.
"dead_or_set_p (ins1, operands[0]) && REG_OK_FOR_INDEX_P (operands[0])"
"add %0,%0\;bcc %1"
[(set_attr "cc" "clobber")])
@ -1408,8 +1406,6 @@
(set (pc) (if_then_else (lt (cc0) (const_int 0))
(match_operand 1 "" "")
(pc)))]
;; ??? This is WRONG, dead_or_set_p cannot be used after reload
;; because the REG_DEAD notes are not maintained after reload.
"dead_or_set_p (ins1, operands[0]) && REG_OK_FOR_INDEX_P (operands[0])"
"add %0,%0\;bcs %1"
[(set_attr "cc" "clobber")])
@ -1419,8 +1415,6 @@
(set (pc) (if_then_else (ge (cc0) (const_int 0))
(pc)
(match_operand 1 "" "")))]
;; ??? This is WRONG, dead_or_set_p cannot be used after reload
;; because the REG_DEAD notes are not maintained after reload.
"dead_or_set_p (ins1, operands[0]) && REG_OK_FOR_INDEX_P (operands[0])"
"add %0,%0\;bcs %1"
[(set_attr "cc" "clobber")])
@ -1430,8 +1424,6 @@
(set (pc) (if_then_else (lt (cc0) (const_int 0))
(pc)
(match_operand 1 "" "")))]
;; ??? This is WRONG, dead_or_set_p cannot be used after reload
;; because the REG_DEAD notes are not maintained after reload.
"dead_or_set_p (ins1, operands[0]) && REG_OK_FOR_INDEX_P (operands[0])"
"add %0,%0\;bcc %1"
[(set_attr "cc" "clobber")])

2
gcc/config/pyr/pyr.md
View File

@ -1224,8 +1224,6 @@
(sign_extend:SI (match_dup 1)))
(set (cc0)
(match_dup 2))]
;; ??? This is WRONG, dead_or_set_p cannot be used after reload
;; because the REG_DEAD notes are not maintained after reload.
"dead_or_set_p (insn, operands[2])"
"*
cc_status.flags |= CC_NO_OVERFLOW;

5
gcc/genattrtab.c
View File

@ -348,6 +348,11 @@ static rtx true_rtx, false_rtx;
static char *alternative_name;
/* Indicate that REG_DEAD notes are valid if dead_or_set_p is ever
called. */
int reload_completed = 0;
/* Simplify an expression. Only call the routine if there is something to
simplify. */
#define SIMPLIFY_TEST_EXP(EXP,INSN_CODE,INSN_INDEX) \

31
gcc/rtlanal.c
View File

@ -1157,19 +1157,30 @@ dead_or_set_regno_p (insn, test_regno)
int regno, endregno;
rtx link;
/* See if there is a death note for something that includes TEST_REGNO. */
for (link = REG_NOTES (insn); link; link = XEXP (link, 1))
/* REG_READ notes are not normally maintained after reload, so we
ignore them if the are invalid. */
if (! reload_completed
#ifdef PRESERVE_DEATH_INFO_REGNO_P
|| PRESERVE_DEATH_INFO_REGNO_P (test_regno)
#endif
)
{
if (REG_NOTE_KIND (link) != REG_DEAD || GET_CODE (XEXP (link, 0)) != REG)
continue;
/* See if there is a death note for something that includes
TEST_REGNO. */
for (link = REG_NOTES (insn); link; link = XEXP (link, 1))
{
if (REG_NOTE_KIND (link) != REG_DEAD
|| GET_CODE (XEXP (link, 0)) != REG)
continue;
regno = REGNO (XEXP (link, 0));
endregno = (regno >= FIRST_PSEUDO_REGISTER ? regno + 1
: regno + HARD_REGNO_NREGS (regno,
GET_MODE (XEXP (link, 0))));
regno = REGNO (XEXP (link, 0));
endregno = (regno >= FIRST_PSEUDO_REGISTER ? regno + 1
: regno + HARD_REGNO_NREGS (regno,
GET_MODE (XEXP (link, 0))));
if (test_regno >= regno && test_regno < endregno)
return 1;
if (test_regno >= regno && test_regno < endregno)
return 1;
}
}
if (GET_CODE (insn) == CALL_INSN