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0ad32d92f1
CTLZ idiom recognition (r303102).
Summary:
The following case:
i = 1;
if(n)
while (n >>= 1)
i++;
use(i);
Was converted to:
i = 1;
if(n)
i += builtin_ctlz(n >> 1, false);
use(i);
Which is not correct. The patch make it:
i = 1;
if(n)
i += builtin_ctlz(n >> 1, true);
use(i);
From: Evgeny Stupachenko <evstupac@gmail.com>
llvm-svn: 303212
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