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(can_combine_p): Don't combine into CALL_INSN where DEST is a global

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reg.

From-SVN: r8305
This commit is contained in:
Richard Kenner 1994-10-18 19:10:20 -04:00
parent 9b316aa2e6
commit 4dca5ec5b8
1 changed files with 5 additions and 1 deletions
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6
gcc/combine.c
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@ -875,7 +875,11 @@ can_combine_p (insn, i3, pred, succ, pdest, psrc)
/* 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))
|| (GET_CODE (i3) == CALL_INSN
&& (find_reg_fusage (i3, USE, dest)
|| (GET_CODE (dest) == REG
&& REGNO (dest) < FIRST_PSEUDO_REGISTER
&& global_regs[REGNO (dest)])))
/* Don't substitute into an incremented register. */
|| FIND_REG_INC_NOTE (i3, dest)
|| (succ && FIND_REG_INC_NOTE (succ, dest))