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s390: Rearrange temporary moves for use of CRJ

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* config/s390/s390.c (s390_expand_cs_hqi): Copy val to a temp before
	performing the compare for the restart loop.

From-SVN: r190280
This commit is contained in:
Richard Henderson 2012-08-09 19:12:56 -07:00 committed by Richard Henderson
parent 1c6b102126
commit 4e1ffb63c7
2 changed files with 15 additions and 6 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2012-08-09 Richard Henderson <rth@redhat.com>
* config/s390/s390.c (s390_expand_cs_hqi): Copy val to a temp before
performing the compare for the restart loop.
2012-08-09 DJ Delorie <dj@redhat.com>
* config/rl78/rl78.c (rl78_alloc_physical_registers): Check for

16
gcc/config/s390/s390.c
View File

@ -4821,7 +4821,7 @@ s390_expand_cs_hqi (enum machine_mode mode, rtx btarget, rtx vtarget, rtx mem,
rtx cmp, rtx new_rtx, bool is_weak)
{
struct alignment_context ac;
rtx cmpv, newv, val, resv, cc, seq0, seq1, seq2, seq3;
rtx cmpv, newv, val, cc, seq0, seq1, seq2, seq3;
rtx res = gen_reg_rtx (SImode);
rtx csloop = NULL, csend = NULL;
@ -4868,14 +4868,18 @@ s390_expand_cs_hqi (enum machine_mode mode, rtx btarget, rtx vtarget, rtx mem,
emit_insn (gen_cstorecc4 (btarget, cc, XEXP (cc, 0), XEXP (cc, 1)));
else
{
rtx tmp;
/* Jump to end if we're done (likely?). */
s390_emit_jump (csend, cc);
/* Check for changes outside mode, and loop internal if so. */
resv = expand_simple_binop (SImode, AND, res, ac.modemaski,
NULL_RTX, 1, OPTAB_DIRECT);
cc = s390_emit_compare (NE, resv, val);
emit_move_insn (val, resv);
/* Check for changes outside mode, and loop internal if so.
Arrange the moves so that the compare is adjacent to the
branch so that we can generate CRJ. */
tmp = copy_to_reg (val);
force_expand_binop (SImode, and_optab, res, ac.modemaski, val,
1, OPTAB_DIRECT);
cc = s390_emit_compare (NE, val, tmp);
s390_emit_jump (csloop, cc);
/* Failed. */