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(canon_reg): Don't call validate_change if INSN is zero. 

From-SVN: r2511
This commit is contained in:
Richard Stallman 1992-10-18 19:56:07 +00:00
parent 9074de27ac
commit aee9dc31f9
1 changed files with 3 additions and 2 deletions
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5
gcc/cse.c
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@ -2386,10 +2386,11 @@ canon_reg (x, insn)
/* If replacing pseudo with hard reg or vice versa, ensure the
insn remains valid. Likewise if the insn has MATCH_DUPs. */
if (new && GET_CODE (new) == REG && GET_CODE (XEXP (x, i)) == REG
if (insn != 0 && new != 0
&& GET_CODE (new) == REG && GET_CODE (XEXP (x, i)) == REG
&& (((REGNO (new) < FIRST_PSEUDO_REGISTER)
!= (REGNO (XEXP (x, i)) < FIRST_PSEUDO_REGISTER))
|| (insn != 0 && insn_n_dups[recog_memoized (insn)] > 0)))
|| insn_n_dups[recog_memoized (insn)] > 0))
validate_change (insn, &XEXP (x, i), new, 1);
else
XEXP (x, i) = new;