On Fri, 10 Oct 2014, Jakub Jelinek wrote:
> On Fri, Oct 10, 2014 at 12:55:21PM +0200, Richard Biener wrote:
> > On Fri, 10 Oct 2014, Jakub Jelinek wrote:
> > > This patch adds a small optimization to emit_case_bit_tests,
> > > instead of emitting (for high, low, mask all constants)
> > > (x - low)
On Fri, Oct 10, 2014 at 12:55:21PM +0200, Richard Biener wrote:
> On Fri, 10 Oct 2014, Jakub Jelinek wrote:
> > This patch adds a small optimization to emit_case_bit_tests,
> > instead of emitting (for high, low, mask all constants)
> > (x - low) <= (high - low) && ((1 << (x - low)) & mask)
> > if
On Fri, 10 Oct 2014, Jakub Jelinek wrote:
> Hi!
>
> This patch adds a small optimization to emit_case_bit_tests,
> instead of emitting (for high, low, mask all constants)
> (x - low) <= (high - low) && ((1 << (x - low)) & mask)
> if high is smaller than BITS_PER_WORD and low > 0 we can emit
> x <
Hi!
This patch adds a small optimization to emit_case_bit_tests,
instead of emitting (for high, low, mask all constants)
(x - low) <= (high - low) && ((1 << (x - low)) & mask)
if high is smaller than BITS_PER_WORD and low > 0 we can emit
x <= high && ((1 << x) & (mask << low))
and avoid subtractio
