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Handle more cases when eliminating the FP to the hard FP

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From-SVN: r13491
This commit is contained in:
Ian Lance Taylor 1997-01-14 20:35:27 +00:00
parent c0560887e8
commit 8026ebba99
1 changed files with 18 additions and 1 deletions
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19
gcc/reload1.c
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@ -1,5 +1,5 @@
/* Reload pseudo regs into hard regs for insns that require hard regs.
Copyright (C) 1987, 88, 89, 92-5, 1996 Free Software Foundation, Inc.
Copyright (C) 1987, 88, 89, 92-6, 1997 Free Software Foundation, Inc.
This file is part of GNU CC.
@ -3237,12 +3237,29 @@ eliminate_regs_in_insn (insn, replace)
{
rtx src = SET_SRC (old_set);
int offset, ok = 0;
rtx prev_insn, prev_set;
if (src == ep->to_rtx)
offset = 0, ok = 1;
else if (GET_CODE (src) == PLUS
&& GET_CODE (XEXP (src, 0)) == CONST_INT)
offset = INTVAL (XEXP (src, 0)), ok = 1;
else if ((prev_insn = prev_nonnote_insn (insn)) != 0
&& (prev_set = single_set (prev_insn)) != 0
&& rtx_equal_p (SET_DEST (prev_set), src))
{
src = SET_SRC (prev_set);
if (src == ep->to_rtx)
offset = 0, ok = 1;
else if (GET_CODE (src) == PLUS
&& GET_CODE (XEXP (src, 0)) == CONST_INT
&& XEXP (src, 1) == ep->to_rtx)
offset = INTVAL (XEXP (src, 0)), ok = 1;
else if (GET_CODE (src) == PLUS
&& GET_CODE (XEXP (src, 1)) == CONST_INT
&& XEXP (src, 0) == ep->to_rtx)
offset = INTVAL (XEXP (src, 1)), ok = 1;
}
if (ok)
{