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Currently LoopUnroll generates a prologue loop before the main loop body to execute first N%UnrollFactor iterations. Also, this loop is used if trip-count can overflow - it's determined by a runtime check. However, we've been mistakenly optimizing this loop to a linear code for UnrollFactor = 2, not taking into account that it also serves as a safe version of the loop if its trip-count overflows. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222451 91177308-0d34-0410-b5e6-96231b3b80d8 |
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.. | ||
PowerPC | ||
X86 | ||
2004-05-13-DontUnrollTooMuch.ll | ||
2005-03-06-BadLoopInfoUpdate.ll | ||
2006-08-24-MultiBlockLoop.ll | ||
2007-04-16-PhiUpdate.ll | ||
2007-05-05-UnrollMiscomp.ll | ||
2007-05-09-UnknownTripCount.ll | ||
2007-11-05-Crash.ll | ||
2011-08-08-PhiUpdate.ll | ||
2011-08-09-IVSimplify.ll | ||
2011-08-09-PhiUpdate.ll | ||
2011-10-01-NoopTrunc.ll | ||
2012-04-09-unroll-indirectbr.ll | ||
basic.ll | ||
ephemeral.ll | ||
ignore-annotation-intrinsic-cost.ll | ||
loop-remarks.ll | ||
nsw-tripcount.ll | ||
partial-unroll-optsize.ll | ||
pr10813.ll | ||
pr11361.ll | ||
pr14167.ll | ||
pr18861.ll | ||
runtime-loop1.ll | ||
runtime-loop2.ll | ||
runtime-loop3.ll | ||
runtime-loop.ll | ||
scevunroll.ll | ||
shifted-tripcount.ll | ||
tripcount-overflow.ll | ||
unloop.ll | ||
unroll-pragmas-disabled.ll | ||
unroll-pragmas.ll | ||
update-loop-info-in-subloops.ll |