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re PR rtl-optimization/46237 (SPECint2006 403.gcc fails with -mzarch -m31)

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2010-11-09  Andreas Krebbel  <Andreas.Krebbel@de.ibm.com>

	PR rtl-optimization/46237
	* ira-conflicts.c (ira_build_conflicts): Record conflicts for call
	saved hard regs if they might get partially clobbered.

From-SVN: r166495
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Andreas Krebbel 2010-11-09 15:52:24 +00:00 committed by Andreas Krebbel
parent de084f55c6
commit 0644953e64
2 changed files with 23 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2010-11-09 Andreas Krebbel <Andreas.Krebbel@de.ibm.com>
PR rtl-optimization/46237
* ira-conflicts.c (ira_build_conflicts): Record conflicts for call
saved hard regs if they might get partially clobbered.
2010-11-09 Paul Koning <ni1d@arrl.net>
* config/pdp11/pdp11.md (lshrsi3, lshrhi3): Use add for

17
gcc/ira-conflicts.c
View File

@ -908,6 +908,23 @@ ira_build_conflicts (void)
IOR_HARD_REG_SET (OBJECT_CONFLICT_HARD_REGS (obj),
temp_hard_reg_set);
}
if (ALLOCNO_CALLS_CROSSED_NUM (a) != 0)
{
int regno;
/* Allocnos bigger than the saved part of call saved
regs must conflict with them. */
for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
if (!TEST_HARD_REG_BIT (call_used_reg_set, regno)
&& HARD_REGNO_CALL_PART_CLOBBERED (regno,
obj->allocno->mode))
{
SET_HARD_REG_BIT (OBJECT_CONFLICT_HARD_REGS (obj), regno);
SET_HARD_REG_BIT (OBJECT_TOTAL_CONFLICT_HARD_REGS (obj),
regno);
}
}
}
}
if (optimize && ira_conflicts_p