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riscv-gcc-1
Commit 7457661d by Michael P. Hayes Committed by Jeff Law
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jump.c (jump_optimize): Allow conditional loading of floating point constants… 

jump.c (jump_optimize): Allow conditional loading of floating point constants and constants from memory.

        * jump.c (jump_optimize): Allow conditional loading of floating point
        constants and constants from memory.  Reinstalled modified_in_p tests.

From-SVN: r17591
parent 460f50dc
Showing with 16 additions and 1 deletions
gcc/ChangeLog
Mon Feb 2 02:08:04 1998 Michael P. Hayes <michaelh@ongaonga.chch.cri.nz>
* jump.c (jump_optimize): Allow conditional loading of floating point
constants and constants from memory. Reinstalled modified_in_p tests.
Mon Feb 2 01:38:39 1998 J"orn Rennecke <amylaar@cygnus.co.uk>
* loop.c (get_condition): Handle sign-extended constants.
......
gcc/jump.c
......@@ -771,6 +771,8 @@ jump_optimize (f, cross_jump, noop_moves, after_regscan)
&& rtx_equal_p (SET_DEST (temp4), temp1)
&& (GET_CODE (SET_SRC (temp4)) == REG
|| GET_CODE (SET_SRC (temp4)) == SUBREG
|| (GET_CODE (SET_SRC (temp4)) == MEM
&& RTX_UNCHANGING_P (SET_SRC (temp4)))
|| CONSTANT_P (SET_SRC (temp4)))
&& (REG_NOTES (temp2) == 0
|| ((REG_NOTE_KIND (REG_NOTES (temp2)) == REG_EQUAL
......@@ -907,6 +909,8 @@ jump_optimize (f, cross_jump, noop_moves, after_regscan)
&& rtx_equal_p (SET_DEST (temp4), temp1)
&& (GET_CODE (SET_SRC (temp4)) == REG
|| GET_CODE (SET_SRC (temp4)) == SUBREG
|| (GET_CODE (SET_SRC (temp4)) == MEM
&& RTX_UNCHANGING_P (SET_SRC (temp4)))
|| CONSTANT_P (SET_SRC (temp4)))
&& (REG_NOTES (temp3) == 0
|| ((REG_NOTE_KIND (REG_NOTES (temp3)) == REG_EQUAL
......@@ -991,6 +995,7 @@ jump_optimize (f, cross_jump, noop_moves, after_regscan)
&& GET_CODE (SET_SRC (temp1)) != REG
&& GET_CODE (SET_SRC (temp1)) != SUBREG
&& GET_CODE (SET_SRC (temp1)) != CONST_INT
&& ! modified_in_p (insn, temp)
&& ! side_effects_p (SET_SRC (temp1))
&& ! may_trap_p (SET_SRC (temp1))
&& rtx_cost (SET_SRC (temp1), SET) < 10)
......@@ -1030,11 +1035,13 @@ jump_optimize (f, cross_jump, noop_moves, after_regscan)
&& GET_MODE_CLASS (GET_MODE (temp2)) == MODE_INT
&& (! SMALL_REGISTER_CLASSES
|| REGNO (temp2) >= FIRST_PSEUDO_REGISTER)
&& ! modified_in_p (insn, temp)
&& ! side_effects_p (SET_SRC (temp1))
&& ! may_trap_p (SET_SRC (temp1))
&& rtx_cost (SET_SRC (temp1), SET) < 10
&& (temp4 = single_set (temp3)) != 0
&& rtx_equal_p (SET_DEST (temp4), temp2)
&& ! modified_in_p (insn, temp3)
&& ! side_effects_p (SET_SRC (temp4))
&& ! may_trap_p (SET_SRC (temp4))
&& rtx_cost (SET_SRC (temp4), SET) < 10)
......@@ -1087,6 +1094,7 @@ jump_optimize (f, cross_jump, noop_moves, after_regscan)
&& REGNO (temp5) >= FIRST_PSEUDO_REGISTER
&& REGNO_FIRST_UID (REGNO (temp5)) == INSN_UID (temp)
&& REGNO_LAST_UID (REGNO (temp5)) == INSN_UID (temp3)
&& ! modified_in_p (insn, temp)
&& ! side_effects_p (SET_SRC (temp1))
&& ! may_trap_p (SET_SRC (temp1))
&& rtx_cost (SET_SRC (temp1), SET) < 10
......@@ -1096,6 +1104,7 @@ jump_optimize (f, cross_jump, noop_moves, after_regscan)
&& (! SMALL_REGISTER_CLASSES
|| REGNO (temp2) >= FIRST_PSEUDO_REGISTER)
&& rtx_equal_p (SET_DEST (temp4), temp2)
&& ! modified_in_p (insn, temp3)
&& ! side_effects_p (SET_SRC (temp4))
&& ! may_trap_p (SET_SRC (temp4))
&& rtx_cost (SET_SRC (temp4), SET) < 10)
......@@ -1153,9 +1162,10 @@ jump_optimize (f, cross_jump, noop_moves, after_regscan)
&& (! SMALL_REGISTER_CLASSES
|| REGNO (temp1) >= FIRST_PSEUDO_REGISTER)
&& (GET_CODE (temp2 = SET_SRC (PATTERN (temp))) == REG
|| (GET_CODE (temp2) == MEM && RTX_UNCHANGING_P (temp2))
|| GET_CODE (temp2) == SUBREG
/* ??? How about floating point constants? */
|| GET_CODE (temp2) == CONST_INT)
|| CONSTANT_P (temp2))
/* Allow either form, but prefer the former if both apply.
There is no point in using the old value of TEMP1 if
it is a register, since cse will alias them. It can
......
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