diff options
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index d0aae69..29dfd15 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -5803,8 +5803,15 @@ combine_simplify_rtx (rtx x, enum machine_mode op0_mode, int in_dest, return x; } - /* If the code changed, return a whole new comparison. */ - if (new_code != code) + /* If the code changed, return a whole new comparison. + We also need to avoid using SUBST in cases where + simplify_comparison has widened a comparison with a CONST_INT, + since in that case the wider CONST_INT may fail the sanity + checks in do_SUBST. */ + if (new_code != code + || (CONST_INT_P (op1) + && GET_MODE (op0) != GET_MODE (XEXP (x, 0)) + && GET_MODE (op0) != GET_MODE (XEXP (x, 1)))) return gen_rtx_fmt_ee (new_code, mode, op0, op1); /* Otherwise, keep this operation, but maybe change its operands. |