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i386.c (ix86_expand_int_movcc): In the general case suppress addition when either ct or cf are zero. 

* config/i386/i386.c (ix86_expand_int_movcc): In the general case
        suppress addition when either ct or cf are zero.

From-SVN: r55540
This commit is contained in:
Rodney Brown 2002-07-17 18:09:56 +00:00 committed by Richard Henderson
parent f1a73cfecf
commit 97f51ac4af
2 changed files with 15 additions and 12 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2002-07-17 Rodney Brown <rbrown64@csc.com.au>
* config/i386/i386.c (ix86_expand_int_movcc): In the general case
suppress addition when either ct or cf are zero.
2002-06-17 Eric Botcazou <ebotcazou@multimania.com>
Glen Nakamura <glen@imodulo.com>

22
gcc/config/i386/i386.c
View File

@ -8866,8 +8866,8 @@ ix86_expand_int_movcc (operands)
ix86_compare_op1, VOIDmode, 0, 1);
nops = 0;
/* On x86_64 the lea instruction operates on Pmode, so we need to get arithmetics
done in proper mode to match. */
/* On x86_64 the lea instruction operates on Pmode, so we need
to get arithmetics done in proper mode to match. */
if (diff == 1)
tmp = out;
else
@ -8931,10 +8931,10 @@ ix86_expand_int_movcc (operands)
if (!optimize_size && !TARGET_CMOVE)
{
if (ct == 0)
if (cf == 0)
{
ct = cf;
cf = 0;
cf = ct;
ct = 0;
if (FLOAT_MODE_P (GET_MODE (ix86_compare_op0)))
/* We may be reversing unordered compare to normal compare,
that is not valid in general (we may convert non-trapping
@ -8983,18 +8983,16 @@ ix86_expand_int_movcc (operands)
out = emit_store_flag (out, code, ix86_compare_op0,
ix86_compare_op1, VOIDmode, 0, 1);
out = expand_simple_binop (mode, PLUS,
out, constm1_rtx,
out = expand_simple_binop (mode, PLUS, out, constm1_rtx,
out, 1, OPTAB_DIRECT);
}
out = expand_simple_binop (mode, AND,
out,
out = expand_simple_binop (mode, AND, out,
gen_int_mode (cf - ct, mode),
out, 1, OPTAB_DIRECT);
out = expand_simple_binop (mode, PLUS,
out, GEN_INT (ct),
out, 1, OPTAB_DIRECT);
if (ct)
out = expand_simple_binop (mode, PLUS, out, GEN_INT (ct),
out, 1, OPTAB_DIRECT);
if (out != operands[0])
emit_move_insn (operands[0], out);