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cse.c (cse_change_cc_mode_insns): Stop at any instruction which modifies NEWREG.

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* cse.c (cse_change_cc_mode_insns): Stop at any instruction
	which modifies NEWREG.
	(cse_condition_code_reg): Update the mode of CC_REG in
	CC_SRC_INSN on our own.

From-SVN: r78413
This commit is contained in:
Kazu Hirata 2004-02-25 00:54:30 +00:00 committed by Kazu Hirata
parent c30316fb64
commit 2e802a6f2f
2 changed files with 25 additions and 4 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2004-02-24 Kazu Hirata <kazu@cs.umass.edu>
* cse.c (cse_change_cc_mode_insns): Stop at any instruction
which modifies NEWREG.
(cse_condition_code_reg): Update the mode of CC_REG in
CC_SRC_INSN on our own.
2004-02-24 Michael Matz <matz@suse.de>
* config/i386/i386.c (ix86_comp_type_attributes): Check for

22
gcc/cse.c
View File

@ -7704,7 +7704,7 @@ cse_change_cc_mode (rtx *loc, void *data)
/* Change the mode of any reference to the register REGNO (NEWREG) to
GET_MODE (NEWREG), starting at START. Stop before END. Stop at
any instruction after START which modifies NEWREG. */
any instruction which modifies NEWREG. */
static void
cse_change_cc_mode_insns (rtx start, rtx end, rtx newreg)
@ -7716,7 +7716,7 @@ cse_change_cc_mode_insns (rtx start, rtx end, rtx newreg)
if (! INSN_P (insn))
continue;
if (insn != start && reg_set_p (newreg, insn))
if (reg_set_p (newreg, insn))
return;
for_each_rtx (&PATTERN (insn), cse_change_cc_mode, newreg);
@ -8008,8 +8008,22 @@ cse_condition_code_reg (void)
if (mode != GET_MODE (cc_src))
abort ();
if (mode != orig_mode)
cse_change_cc_mode_insns (cc_src_insn, NEXT_INSN (last_insn),
gen_rtx_REG (mode, REGNO (cc_reg)));
{
rtx newreg = gen_rtx_REG (mode, REGNO (cc_reg));
/* Change the mode of CC_REG in CC_SRC_INSN to
GET_MODE (NEWREG). */
for_each_rtx (&PATTERN (cc_src_insn), cse_change_cc_mode,
newreg);
for_each_rtx (&REG_NOTES (cc_src_insn), cse_change_cc_mode,
newreg);
/* Do the same in the following insns that use the
current value of CC_REG within BB. */
cse_change_cc_mode_insns (NEXT_INSN (cc_src_insn),
NEXT_INSN (last_insn),
newreg);
}
}
}
}