diff options
| author | Chandler Carruth <chandlerc@gmail.com> | 2017-01-20 08:42:19 +0000 |
|---|---|---|
| committer | Chandler Carruth <chandlerc@gmail.com> | 2017-01-20 08:42:19 +0000 |
| commit | 017c62c41d4113b634f71edc81595c2383f8befb (patch) | |
| tree | fed54c181e09b912a82ad0f6ab5bf2f85051db44 /lib/Passes | |
| parent | 7dc10faea099efbc379a970badebb0f8245b42c7 (diff) | |
[PM] Port LoopSink to the new pass manager.
Like several other loop passes (the vectorizer, etc) this pass doesn't
really fit the model of a loop pass. The critical distinction is that it
isn't intended to be pipelined together with other loop passes. I plan
to add some documentation to the loop pass manager to make this more
clear on that side.
LoopSink is also different because it doesn't really need a lot of the
infrastructure of our loop passes. For example, if there aren't loop
invariant instructions causing a preheader to exist, there is no need to
form a preheader. It also doesn't need LCSSA because this pass is
only involved in sinking invariant instructions from a preheader into
the loop, not reasoning about live-outs.
This allows some nice simplifications to the pass in the new PM where we
can directly walk the loops once without restructuring them.
Differential Revision: https://reviews.llvm.org/D28921
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@292589 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Passes')
| -rw-r--r-- | lib/Passes/PassBuilder.cpp | 1 | ||||
| -rw-r--r-- | lib/Passes/PassRegistry.def | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/lib/Passes/PassBuilder.cpp b/lib/Passes/PassBuilder.cpp index 00f8a9dacbc3..31b9ea2952d6 100644 --- a/lib/Passes/PassBuilder.cpp +++ b/lib/Passes/PassBuilder.cpp @@ -107,6 +107,7 @@ #include "llvm/Transforms/Scalar/LoopPassManager.h" #include "llvm/Transforms/Scalar/LoopRotation.h" #include "llvm/Transforms/Scalar/LoopSimplifyCFG.h" +#include "llvm/Transforms/Scalar/LoopSink.h" #include "llvm/Transforms/Scalar/LoopStrengthReduce.h" #include "llvm/Transforms/Scalar/LoopUnrollPass.h" #include "llvm/Transforms/Scalar/LowerAtomic.h" diff --git a/lib/Passes/PassRegistry.def b/lib/Passes/PassRegistry.def index a9939fddb98c..d93fbdb2c722 100644 --- a/lib/Passes/PassRegistry.def +++ b/lib/Passes/PassRegistry.def @@ -159,6 +159,7 @@ FUNCTION_PASS("lower-guard-intrinsic", LowerGuardIntrinsicPass()) FUNCTION_PASS("guard-widening", GuardWideningPass()) FUNCTION_PASS("gvn", GVN()) FUNCTION_PASS("loop-simplify", LoopSimplifyPass()) +FUNCTION_PASS("loop-sink", LoopSinkPass()) FUNCTION_PASS("lowerinvoke", LowerInvokePass()) FUNCTION_PASS("mem2reg", PromotePass()) FUNCTION_PASS("memcpyopt", MemCpyOptPass()) |