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avr.c (avr_case_values_threshold): Return 7.

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* config/avr/avr.c (avr_case_values_threshold): Return 7.

From-SVN: r188336
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Georg-Johann Lay 2012-06-08 18:32:25 +00:00 committed by Georg-Johann Lay
parent 98cf47d1a5
commit 102375cc16
2 changed files with 14 additions and 2 deletions
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4
gcc/ChangeLog
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@ -1,3 +1,7 @@
2012-06-08 Georg-Johann Lay <avr@gjlay.de>
* config/avr/avr.c (avr_case_values_threshold): Return 7.
2012-06-07 Andreas Schwab <schwab@linux-m68k.org>
* genhooks.c (main): Set progname.

12
gcc/config/avr/avr.c
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@ -9419,12 +9419,20 @@ avr_return_in_memory (const_tree type, const_tree fntype ATTRIBUTE_UNUSED)
return false;
}
/* Worker function for CASE_VALUES_THRESHOLD. */
/* Implement `CASE_VALUES_THRESHOLD'. */
/* Supply the default for --param case-values-threshold=0 */
static unsigned int
avr_case_values_threshold (void)
{
return (!AVR_HAVE_JMP_CALL || TARGET_CALL_PROLOGUES) ? 8 : 17;
/* The exact break-even point between a jump table and an if-else tree
depends on several factors not available here like, e.g. if 8-bit
comparisons can be used in the if-else tree or not, on the
range of the case values, if the case value can be reused, on the
register allocation, etc. '7' appears to be a good choice. */
return 7;
}