From db2f435beacd8e9e9f07616c5806acb518ff821c Mon Sep 17 00:00:00 2001 From: Andrew Pinski Date: Wed, 16 Jul 2003 18:58:12 +0000 Subject: gcse.c (gcse_constant_p): COMPARE of the same registers is a constant if... 2003-05-02 Andrew Pinski * gcse.c (gcse_constant_p): COMPARE of the same registers is a constant if they are not floating point registers. From-SVN: r69471 --- gcc/ChangeLog | 5 +++++ gcc/gcse.c | 11 +++++++++++ 2 files changed, 16 insertions(+) (limited to 'gcc') 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 + * 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 + PR c/10962 * ggc.h: Add header guards. * c-decl.c (finish_struct): Sort fields if diff --git a/gcc/gcse.c b/gcc/gcse.c index 30d4c1e..6420faf 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; -- cgit v1.1