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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109525 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach 2010-07-27 18:36:27 +00:00
parent 8b5749da2a
commit 977fa34df8
1 changed files with 3 additions and 3 deletions
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6
lib/CodeGen/RegAllocLinearScan.cpp
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@ -255,9 +255,9 @@ namespace {
SmallVector<LiveInterval*, 8> &SpillIntervals);
/// attemptTrivialCoalescing - If a simple interval is defined by a copy,
/// try allocate the definition the same register as the source register
/// if the register is not defined during live time of the interval. This
/// eliminate a copy. This is used to coalesce copies which were not
/// try to allocate the definition to the same register as the source,
/// if the register is not defined during the life time of the interval.
/// This eliminates a copy, and is used to coalesce copies which were not
/// coalesced away before allocation either due to dest and src being in
/// different register classes or because the coalescer was overly
/// conservative.