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i386.c (ix86_emit_fp_unordered_jump): Set JUMP_LABEL to the jump insn.

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* config/i386/i386.c (ix86_emit_fp_unordered_jump):
	Set JUMP_LABEL to the jump insn.
	(ix86_emit_i387_log1p): Use ix86_expand_branch to expand branch.
	Predict emitted jump and add label to jump insn.

From-SVN: r265274
This commit is contained in:
Uros Bizjak 2018-10-18 18:49:20 +02:00 committed by Uros Bizjak
parent 23abcf7874
commit b75dff03b7
2 changed files with 34 additions and 17 deletions
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7
gcc/ChangeLog
View File

@ -1,3 +1,10 @@
2018-10-18 Uros Bizjak <ubizjak@gmail.com>
* config/i386/i386.c (ix86_emit_fp_unordered_jump):
Set JUMP_LABEL to the jump insn.
(ix86_emit_i387_log1p): Use ix86_expand_branch to expand branch.
Predict emitted jump and add label to jump insn.
2018-10-18 David Malcolm <dmalcolm@redhat.com>
PR tree-optimization/87562

44
gcc/config/i386/i386.c
View File

@ -43866,6 +43866,7 @@ void
ix86_emit_fp_unordered_jump (rtx label)
{
rtx reg = gen_reg_rtx (HImode);
rtx_insn *insn;
rtx temp;
emit_insn (gen_x86_fnstsw_1 (reg));
@ -43888,10 +43889,9 @@ ix86_emit_fp_unordered_jump (rtx label)
temp = gen_rtx_IF_THEN_ELSE (VOIDmode, temp,
gen_rtx_LABEL_REF (VOIDmode, label),
pc_rtx);
temp = gen_rtx_SET (pc_rtx, temp);
emit_jump_insn (temp);
insn = emit_jump_insn (gen_rtx_SET (pc_rtx, temp));
predict_jump (REG_BR_PROB_BASE * 10 / 100);
JUMP_LABEL (insn) = label;
}
/* Output code to perform a log1p XFmode calculation. */
@ -43902,27 +43902,36 @@ void ix86_emit_i387_log1p (rtx op0, rtx op1)
rtx_code_label *label2 = gen_label_rtx ();
rtx tmp = gen_reg_rtx (XFmode);
rtx tmp2 = gen_reg_rtx (XFmode);
rtx test;
rtx res = gen_reg_rtx (XFmode);
rtx cst, cstln2, cst1;
rtx_insn *insn;
cst = const_double_from_real_value
(REAL_VALUE_ATOF ("0.29289321881345247561810596348408353", XFmode), XFmode);
cstln2 = force_reg (XFmode, standard_80387_constant_rtx (4)); /* fldln2 */
emit_insn (gen_absxf2 (tmp, op1));
emit_move_insn (tmp2, standard_80387_constant_rtx (4)); /* fldln2 */
test = gen_rtx_GE (VOIDmode, tmp,
const_double_from_real_value (
REAL_VALUE_ATOF ("0.29289321881345247561810596348408353", XFmode),
XFmode));
emit_jump_insn
(gen_cbranchxf4 (test, XEXP (test, 0), XEXP (test, 1), label1));
emit_insn (gen_fyl2xp1xf3_i387 (op0, op1, tmp2));
cst = force_reg (XFmode, cst);
ix86_expand_branch (GE, tmp, cst, label1);
predict_jump (REG_BR_PROB_BASE * 10 / 100);
insn = get_last_insn ();
JUMP_LABEL (insn) = label1;
emit_insn (gen_fyl2xp1xf3_i387 (res, op1, cstln2));
emit_jump (label2);
emit_label (label1);
emit_move_insn (tmp, CONST1_RTX (XFmode));
emit_insn (gen_addxf3 (tmp, op1, tmp));
emit_insn (gen_fyl2xxf3_i387 (op0, tmp, tmp2));
LABEL_NUSES (label1) = 1;
cst1 = force_reg (XFmode, CONST1_RTX (XFmode));
emit_insn (gen_rtx_SET (tmp, gen_rtx_PLUS (XFmode, op1, cst1)));
emit_insn (gen_fyl2xxf3_i387 (res, tmp, cstln2));
emit_label (label2);
LABEL_NUSES (label2) = 1;
emit_move_insn (op0, res);
}
/* Emit code for round calculation. */
@ -43939,7 +43948,8 @@ void ix86_emit_i387_round (rtx op0, rtx op1)
rtx_code_label *jump_label = gen_label_rtx ();
rtx (*floor_insn) (rtx, rtx);
rtx (*neg_insn) (rtx, rtx);
rtx insn, tmp;
rtx_insn *insn;
rtx tmp;
switch (inmode)
{