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re PR tree-optimization/91109 ([arm] gcc.c-torture/execute/20040709-1.c fails since r273135)

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2019-08-16  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        PR tree-optimization/91109
        * lra-int.h (lra_need_for_scratch_reg_p): Declare.
        * lra.c (lra): Use lra_need_for_scratch_reg_p.
        * lra-spills.c (lra_need_for_scratch_reg_p): New function.

From-SVN: r274573
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Bernd Edlinger 2019-08-16 15:34:47 +00:00 • committed by Bernd Edlinger
parent 94538b6545
commit 23e0f4c339
4 changed files with 26 additions and 1 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2019-08-16 Bernd Edlinger <bernd.edlinger@hotmail.de>
PR tree-optimization/91109
* lra-int.h (lra_need_for_scratch_reg_p): Declare.
* lra.c (lra): Use lra_need_for_scratch_reg_p.
* lra-spills.c (lra_need_for_scratch_reg_p): New function.
2019-08-16 Uroš Bizjak <ubizjak@gmail.com>
* config/i386/mmx.md (mmxdoublemode): New mode attribute.

1
gcc/lra-int.h
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@ -396,6 +396,7 @@ extern bool lra_coalesce (void);
/* lra-spills.c: */
extern bool lra_need_for_scratch_reg_p (void);
extern bool lra_need_for_spills_p (void);
extern void lra_spill (void);
extern void lra_final_code_change (void);

13
gcc/lra-spills.c
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@ -549,6 +549,19 @@ spill_pseudos (void)
}
}
/* Return true if we need scratch reg assignments. */
bool
lra_need_for_scratch_reg_p (void)
{
int i; max_regno = max_reg_num ();
for (i = FIRST_PSEUDO_REGISTER; i < max_regno; i++)
if (lra_reg_info[i].nrefs != 0 && lra_get_regno_hard_regno (i) < 0
&& lra_former_scratch_p (i))
return true;
return false;
}
/* Return true if we need to change some pseudos into memory. */
bool
lra_need_for_spills_p (void)

6
gcc/lra.c
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@ -2567,7 +2567,11 @@ lra (FILE *f)
lra_create_live_ranges (lra_reg_spill_p, true);
live_p = true;
if (! lra_need_for_spills_p ())
break;
{
if (lra_need_for_scratch_reg_p ())
continue;
break;
}
}
lra_spill ();
/* Assignment of stack slots changes elimination offsets for