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Fix middle-end/102395: reg_class having only NO_REGS and ALL_REGS.

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So this is a simple fix is to just add to the assert that
sclass and dclass are both greater than or equal to NO_REGS.
NO_REGS is documented as the first register class so it should
have the value of 0.

gcc/ChangeLog:

	* lra-constraints.c (check_and_process_move): Assert
	that dclass and sclass are greater than or equal to NO_REGS.
This commit is contained in:
Andrew Pinski 2021-09-18 08:20:16 +00:00
parent cf74e7b57b
commit 767c098247
1 changed files with 2 additions and 2 deletions
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4
gcc/lra-constraints.c
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@ -1276,7 +1276,7 @@ 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);
gcc_assert (dclass < LIM_REG_CLASSES && dclass >= NO_REGS);
if (dclass == ALL_REGS)
/* ALL_REGS is used for new pseudos created by transformations
like reload of SUBREG_REG (see function
@ -1288,7 +1288,7 @@ 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);
gcc_assert (sclass < LIM_REG_CLASSES && sclass >= NO_REGS);
if (sclass == ALL_REGS)
/* See comments above. */
return false;