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Generate constant for shift once. 

From-SVN: r52644
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Tom Rix 2002-04-22 23:20:12 +00:00 committed by Tom Rix
parent 6067f1feb2
commit b7c89afe90
2 changed files with 7 additions and 4 deletions
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4
gcc/ChangeLog
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@ -1,3 +1,7 @@
2002-04-22 Tom Rix <trix@redhat.com>
* expmed.c (init_expmed): Generate shifted constant once.
2002-04-22 Zack Weinberg <zack@codesourcery.com>
* c-lex.c (lex_charconst): Call convert to get constant in

7
gcc/expmed.c
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@ -144,19 +144,18 @@ init_expmed ()
for (m = 1; m < MAX_BITS_PER_WORD; m++)
{
rtx c_int = GEN_INT ((HOST_WIDE_INT) 1 << m);
shift_cost[m] = shiftadd_cost[m] = shiftsub_cost[m] = 32000;
XEXP (SET_SRC (PATTERN (shift_insn)), 1) = GEN_INT (m);
if (recog (PATTERN (shift_insn), shift_insn, &dummy) >= 0)
shift_cost[m] = rtx_cost (SET_SRC (PATTERN (shift_insn)), SET);
XEXP (XEXP (SET_SRC (PATTERN (shiftadd_insn)), 0), 1)
= GEN_INT ((HOST_WIDE_INT) 1 << m);
XEXP (XEXP (SET_SRC (PATTERN (shiftadd_insn)), 0), 1) = c_int;
if (recog (PATTERN (shiftadd_insn), shiftadd_insn, &dummy) >= 0)
shiftadd_cost[m] = rtx_cost (SET_SRC (PATTERN (shiftadd_insn)), SET);
XEXP (XEXP (SET_SRC (PATTERN (shiftsub_insn)), 0), 1)
= GEN_INT ((HOST_WIDE_INT) 1 << m);
XEXP (XEXP (SET_SRC (PATTERN (shiftsub_insn)), 0), 1) = c_int;
if (recog (PATTERN (shiftsub_insn), shiftsub_insn, &dummy) >= 0)
shiftsub_cost[m] = rtx_cost (SET_SRC (PATTERN (shiftsub_insn)), SET);
}