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loop.c (check_dbra_loop): While reversing the loop...

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* loop.c (check_dbra_loop): While reversing the loop, if the
        comparison value has a VOID mode use the mode of the other operand
        to compute the mask.

From-SVN: r24444
This commit is contained in:
Andreas Schwab 1998-12-30 21:51:53 +00:00 committed by Jeff Law
parent ff381587ec
commit 2c74fb2bf0
2 changed files with 12 additions and 2 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
1998-12-30 Andreas Schwab <schwab@issan.cs.uni-dortmund.de>
* loop.c (check_dbra_loop): While reversing the loop, if the
comparison value has a VOID mode use the mode of the other operand
to compute the mask.
Wed Dec 30 22:24:00 1998 Michael Meissner <meissner@cygnus.com>
* rs6000.md ({save,restore}_stack_function): Take 2 operands to

8
gcc/loop.c
View File

@ -6857,8 +6857,12 @@ check_dbra_loop (loop_end, insn_count, loop_start, loop_info)
add_val = INTVAL (bl->biv->add_val);
comparison_value = XEXP (comparison, 1);
comparison_const_width
= GET_MODE_BITSIZE (GET_MODE (XEXP (comparison, 1)));
if (GET_MODE (comparison_value) == VOIDmode)
comparison_const_width
= GET_MODE_BITSIZE (GET_MODE (XEXP (comparison, 0)));
else
comparison_const_width
= GET_MODE_BITSIZE (GET_MODE (comparison_value));
if (comparison_const_width > HOST_BITS_PER_WIDE_INT)
comparison_const_width = HOST_BITS_PER_WIDE_INT;
comparison_sign_mask