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Enable redundant phi elimination after LSR.

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This will be more important as we extend the LSR pass in ways that don't rely on the formula solver. In particular, we need it for constructing IV chains.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147724 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick 2012-01-07 07:08:17 +00:00
parent 0ff100dec0
commit 24f670f1ba
1 changed files with 3 additions and 1 deletions
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4
lib/Transforms/Scalar/LoopStrengthReduce.cpp
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@ -86,8 +86,10 @@ static cl::opt<bool> EnableRetry(
// Temporary flag to cleanup congruent phis after LSR phi expansion.
// It's currently disabled until we can determine whether it's truly useful or
// not. The flag should be removed after the v3.0 release.
// This is now needed for ivchains.
static cl::opt<bool> EnablePhiElim(
"enable-lsr-phielim", cl::Hidden, cl::desc("Enable LSR phi elimination"));
"enable-lsr-phielim", cl::Hidden, cl::init(true),
cl::desc("Enable LSR phi elimination"));
namespace {