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lra-constraints.c (check_and_process_move): Constrain the range of DCLASS and SCLASS to avoid false positive out of bounds...

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* lra-constraints.c (check_and_process_move): Constrain the
	range of DCLASS and SCLASS to avoid false positive out of bounds
	array index warning.

From-SVN: r242993
This commit is contained in:
Jeff Law 2016-11-29 21:15:55 -07:00 committed by Jeff Law
parent fbe9724cc3
commit 48855443fa
2 changed files with 8 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2016-11-29 Jeff Law <law@redhat.com>
* lra-constraints.c (check_and_process_move): Constrain the
range of DCLASS and SCLASS to avoid false positive out of bounds
array index warning.
2016-11-29 David Malcolm <dmalcolm@redhat.com>
* doc/install.texi (--with-target-bdw-gc): Remove stray '@'.

2
gcc/lra-constraints.c
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@ -1150,6 +1150,7 @@ check_and_process_move (bool *change_p, bool *sec_mem_p ATTRIBUTE_UNUSED)
sclass = dclass = NO_REGS;
if (REG_P (dreg))
dclass = get_reg_class (REGNO (dreg));
gcc_assert (dclass < LIM_REG_CLASSES);
if (dclass == ALL_REGS)
/* ALL_REGS is used for new pseudos created by transformations
like reload of SUBREG_REG (see function
@ -1161,6 +1162,7 @@ check_and_process_move (bool *change_p, bool *sec_mem_p ATTRIBUTE_UNUSED)
return false;
if (REG_P (sreg))
sclass = get_reg_class (REGNO (sreg));
gcc_assert (sclass < LIM_REG_CLASSES);
if (sclass == ALL_REGS)
/* See comments above. */
return false;