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(jump_optimize): Allow SUBREG in many places where REG is allowed.

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From-SVN: r1872
This commit is contained in:
Richard Kenner 1992-08-17 07:36:39 -04:00
parent b8eb43a245
commit a73f9fc940
1 changed files with 3 additions and 0 deletions
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3
gcc/jump.c
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@ -699,6 +699,7 @@ jump_optimize (f, cross_jump, noop_moves, after_regscan)
&& GET_CODE (PATTERN (temp2)) == SET
&& rtx_equal_p (SET_DEST (PATTERN (temp2)), temp1)
&& (GET_CODE (SET_SRC (PATTERN (temp2))) == REG
|| GET_CODE (SET_SRC (PATTERN (temp2))) == SUBREG
|| CONSTANT_P (SET_SRC (PATTERN (temp2))))
&& (REG_NOTES (temp2) == 0
|| ((REG_NOTE_KIND (REG_NOTES (temp2)) == REG_EQUAL
@ -830,6 +831,7 @@ jump_optimize (f, cross_jump, noop_moves, after_regscan)
#endif
&& GET_MODE_CLASS (GET_MODE (temp1)) == MODE_INT
&& (GET_CODE (temp2 = SET_SRC (PATTERN (temp))) == REG
|| GET_CODE (temp2) == SUBREG
|| GET_CODE (temp2) == CONST_INT)
/* Allow either form, but prefer the former if both apply. */
&& (((temp3 = reg_set_last (temp1, insn)) != 0
@ -838,6 +840,7 @@ jump_optimize (f, cross_jump, noop_moves, after_regscan)
&& REGNO (temp3) >= FIRST_PSEUDO_REGISTER
#endif
)
|| GET_CODE (temp3) == SUBREG
|| GET_CODE (temp3) == CONST_INT))
/* Make the latter case look like x = x; if (...) x = 0; */
|| ((temp3 = temp1, BRANCH_COST >= 2)