diff options
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/gcse.c | 11 |
2 files changed, 16 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index f8b4875..5778c5c 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,10 @@ 2003-07-16 Andrew Pinski <pinskia@physics.uc.edu> + * gcse.c (gcse_constant_p): COMPARE of the same registers is a constant + if they are not floating point registers. + +2003-07-16 Andrew Pinski <pinskia@physics.uc.edu> + PR c/10962 * ggc.h: Add header guards. * c-decl.c (finish_struct): Sort fields if @@ -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; |