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Disable the new aggressive remat logic introduced in 54000; it causes some

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regressions, such as PR2595. Also, there is a significant code-quality
issue in SPEC 464.h264ref and a few others.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54014 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2008-07-25 15:08:37 +00:00
parent 92879f3a9e
commit 4c8f87038d
1 changed files with 4 additions and 0 deletions
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4
lib/CodeGen/LiveIntervalAnalysis.cpp
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@ -47,6 +47,8 @@ static cl::opt<bool> SplitAtBB("split-intervals-at-bb",
static cl::opt<int> SplitLimit("split-limit",
cl::init(-1), cl::Hidden);
static cl::opt<bool> EnableAggressiveRemat("aggressive-remat", cl::Hidden);
STATISTIC(numIntervals, "Number of original intervals");
STATISTIC(numIntervalsAfter, "Number of intervals after coalescing");
STATISTIC(numFolds , "Number of loads/stores folded into instructions");
@ -797,6 +799,8 @@ bool LiveIntervals::isReMaterializable(const LiveInterval &li,
// rules.
if (!MI->getDesc().isRematerializable() ||
!tii_->isTriviallyReMaterializable(MI)) {
if (!EnableAggressiveRemat)
return false;
// If the instruction access memory but the memoperands have been lost,
// we can't analyze it.