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| author | Richard Kenner <kenner@gcc.gnu.org> | 1994-07-05 19:12:04 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1994-07-05 19:12:04 -0400 |
| commit | cd5e8f1fc2a2a1934591a15b27005821886db768 (patch) | |
| tree | 83e352d12562276891e4db0bdba05b61133fdd56 | |
| parent | 325877e17758607740ed3d112050a19c6ee9b38a (diff) | |
| download | gcc-cd5e8f1fc2a2a1934591a15b27005821886db768.zip gcc-cd5e8f1fc2a2a1934591a15b27005821886db768.tar.gz gcc-cd5e8f1fc2a2a1934591a15b27005821886db768.tar.bz2 | |
(can_combine_p): Don't check for replacing arg of function here.
(can_combine_p): Do it here.
From-SVN: r7657
| -rw-r--r-- | gcc/combine.c | 13 |
1 files changed, 2 insertions, 11 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 0cd1ee8..9e929ed 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -878,6 +878,8 @@ can_combine_p (insn, i3, pred, succ, pdest, psrc) || (rtx_equal_p (src, dest) && find_reg_note (insn, REG_EQUAL, NULL_RTX)) /* Can't merge a function call. */ || GET_CODE (src) == CALL + /* Don't eliminate a function call argument. */ + || (GET_CODE (i3) == CALL_INSN && find_reg_fusage (i3, USE, dest)) /* Don't substitute into an incremented register. */ || FIND_REG_INC_NOTE (i3, dest) || (succ && FIND_REG_INC_NOTE (succ, dest)) @@ -1218,17 +1220,6 @@ try_combine (i3, i2, i1) || find_reg_note (i3, REG_LIBCALL, NULL_RTX)) return 0; - /* If I1 or I2 is an argument set insn, and I3 is the actual - CALL_INSN using it as argument, never combine the two. - This to prevent the elimination of insns that setup a - parameter register for a CALL_INSN. */ - if (GET_CODE (i3) == CALL_INSN - && (((temp = single_set (i2)) - && find_reg_fusage (i3, USE, SET_DEST (temp))) - || (i1 && (temp = single_set (i1)) - && find_reg_fusage (i3, USE, SET_DEST (temp))))) - return 0; - combine_attempts++; undobuf.num_undo = previous_num_undos = 0; |