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riscv-gcc-1
Commit 472fbdd1 by Richard Kenner
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(try_combine): Save DEST of NI2PAT before calling recog_for_combine, 

which might make it a PARALLEL.

From-SVN: r2411
parent 460fe04f
Showing with 5 additions and 3 deletions
gcc/combine.c
......@@ -1676,11 +1676,13 @@ try_combine (i3, i2, i1)
&& ! find_reg_note (i3, REG_UNUSED,
SET_DEST (XVECEXP (newpat, 0, 0))))
{
rtx ni2dest;
newi2pat = XVECEXP (newpat, 0, 0);
ni2dest = SET_DEST (XVECEXP (newpat, 0, 0));
newpat = XVECEXP (newpat, 0, 1);
SUBST (SET_SRC (newpat),
gen_lowpart_for_combine (GET_MODE (SET_SRC (newpat)),
SET_DEST (newi2pat)));
gen_lowpart_for_combine (GET_MODE (SET_SRC (newpat)), ni2dest));
i2_code_number = recog_for_combine (&newi2pat, i2, &new_i2_notes);
if (i2_code_number >= 0)
insn_code_number = recog_for_combine (&newpat, i3, &new_i3_notes);
......@@ -1717,7 +1719,7 @@ try_combine (i3, i2, i1)
insn = NEXT_INSN (insn))
{
if (GET_RTX_CLASS (GET_CODE (insn)) == 'i'
&& reg_referenced_p (SET_DEST (newi2pat), PATTERN (insn)))
&& reg_referenced_p (ni2dest, PATTERN (insn)))
{
for (link = LOG_LINKS (insn); link;
link = XEXP (link, 1))
......
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