diff options
Diffstat (limited to 'gcc/loop-iv.c')
| -rw-r--r-- | gcc/loop-iv.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/gcc/loop-iv.c b/gcc/loop-iv.c index bf7f721f926..d4ecd0e014f 100644 --- a/gcc/loop-iv.c +++ b/gcc/loop-iv.c @@ -1505,19 +1505,26 @@ implies_p (rtx a, rtx b) rtx op0, op1, opb0, opb1, r; enum machine_mode mode; + if (rtx_equal_p (a, b)) + return true; + if (GET_CODE (a) == EQ) { op0 = XEXP (a, 0); op1 = XEXP (a, 1); - if (REG_P (op0)) + if (REG_P (op0) + || (GET_CODE (op0) == SUBREG + && REG_P (SUBREG_REG (op0)))) { r = simplify_replace_rtx (b, op0, op1); if (r == const_true_rtx) return true; } - if (REG_P (op1)) + if (REG_P (op1) + || (GET_CODE (op1) == SUBREG + && REG_P (SUBREG_REG (op1)))) { r = simplify_replace_rtx (b, op1, op0); if (r == const_true_rtx) |