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(canon_reg, cse_insn): Don't examine insn_n_dups if recog_memoized 

fails to find a match.

From-SVN: r13888
This commit is contained in:
Richard Kenner 1997-04-13 14:51:22 -04:00
parent cfb3ee16db
commit 5887325513
1 changed files with 6 additions and 2 deletions
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8
gcc/cse.c
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@ -2595,6 +2595,7 @@ canon_reg (x, insn)
if (fmt[i] == 'e')
{
rtx new = canon_reg (XEXP (x, i), insn);
int insn_code;
/* If replacing pseudo with hard reg or vice versa, ensure the
insn remains valid. Likewise if the insn has MATCH_DUPs. */
@ -2602,7 +2603,8 @@ canon_reg (x, insn)
&& GET_CODE (new) == REG && GET_CODE (XEXP (x, i)) == REG
&& (((REGNO (new) < FIRST_PSEUDO_REGISTER)
!= (REGNO (XEXP (x, i)) < FIRST_PSEUDO_REGISTER))
|| insn_n_dups[recog_memoized (insn)] > 0))
|| (insn_code = recog_memoized (insn)) < 0
|| insn_n_dups[insn_code] > 0))
validate_change (insn, &XEXP (x, i), new, 1);
else
XEXP (x, i) = new;
@ -6328,11 +6330,13 @@ cse_insn (insn, in_libcall_block)
rtx dest = SET_DEST (sets[i].rtl);
rtx src = SET_SRC (sets[i].rtl);
rtx new = canon_reg (src, insn);
int insn_code;
if ((GET_CODE (new) == REG && GET_CODE (src) == REG
&& ((REGNO (new) < FIRST_PSEUDO_REGISTER)
!= (REGNO (src) < FIRST_PSEUDO_REGISTER)))
|| insn_n_dups[recog_memoized (insn)] > 0)
|| (insn_code = recog_memoized (insn)) < 0
|| insn_n_dups[insn_code] > 0)
validate_change (insn, &SET_SRC (sets[i].rtl), new, 1);
else
SET_SRC (sets[i].rtl) = new;