diff options
Diffstat (limited to 'gcc/gcse.c')
| -rw-r--r-- | gcc/gcse.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/gcc/gcse.c b/gcc/gcse.c index 30d4c1ee171..6420faf2a20 100644 --- a/gcc/gcse.c +++ b/gcc/gcse.c @@ -2123,6 +2123,17 @@ gcse_constant_p (rtx x) && GET_CODE (XEXP (x, 1)) == CONST_INT) return true; + + /* Consider a COMPARE of the same registers is a constant + if they are not floating point registers. */ + if (GET_CODE(x) == COMPARE + && GET_CODE (XEXP (x, 0)) == REG + && GET_CODE (XEXP (x, 1)) == REG + && REGNO (XEXP (x, 0)) == REGNO (XEXP (x, 1)) + && ! FLOAT_MODE_P (GET_MODE (XEXP (x, 0))) + && ! FLOAT_MODE_P (GET_MODE (XEXP (x, 1)))) + return true; + if (GET_CODE (x) == CONSTANT_P_RTX) return false; |