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| author | Alina Sbirlea <asbirlea@google.com> | 2016-07-22 22:02:19 +0000 |
|---|---|---|
| committer | Alina Sbirlea <asbirlea@google.com> | 2016-07-22 22:02:19 +0000 |
| commit | ba21ffebff540841da6c8847fcecd82ae734038d (patch) | |
| tree | f72bcc8cc0563b4962caae2eff1ce2ad163d780c | |
| parent | 6118ce1221a8a4b6000289ba09efc413871304fc (diff) | |
| download | bcm5719-llvm-ba21ffebff540841da6c8847fcecd82ae734038d.tar.gz bcm5719-llvm-ba21ffebff540841da6c8847fcecd82ae734038d.zip | |
Add flag to PassManagerBuilder to disable GVN Hoist Pass.
Summary:
Adding a flag to diable GVN Hoisting by default.
Note: The GVN Hoist Pass causes some Halide tests to hang. Halide will disable the pass while investigating.
Reviewers: llvm-commits, chandlerc, spop, dberlin
Subscribers: mehdi_amini
Differential Revision: https://reviews.llvm.org/D22639
llvm-svn: 276479
| -rw-r--r-- | llvm/lib/Transforms/IPO/PassManagerBuilder.cpp | 7 | ||||
| -rw-r--r-- | llvm/test/Feature/optnone-opt.ll | 1 |
2 files changed, 6 insertions, 2 deletions
diff --git a/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp b/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp index e921f865648..5e93bb65609 100644 --- a/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp +++ b/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp @@ -134,6 +134,10 @@ static cl::opt<int> PreInlineThreshold( cl::desc("Control the amount of inlining in pre-instrumentation inliner " "(default = 75)")); +static cl::opt<bool> EnableGVNHoist( + "enable-gvn-hoist", cl::init(false), cl::Hidden, + cl::desc("Enable the experimental GVN Hoisting pass")); + PassManagerBuilder::PassManagerBuilder() { OptLevel = 2; SizeLevel = 0; @@ -232,7 +236,8 @@ void PassManagerBuilder::populateFunctionPassManager( FPM.add(createCFGSimplificationPass()); FPM.add(createSROAPass()); FPM.add(createEarlyCSEPass()); - FPM.add(createGVNHoistPass()); + if(EnableGVNHoist) + FPM.add(createGVNHoistPass()); FPM.add(createLowerExpectIntrinsicPass()); } diff --git a/llvm/test/Feature/optnone-opt.ll b/llvm/test/Feature/optnone-opt.ll index bf26a3c322e..a17f97785f0 100644 --- a/llvm/test/Feature/optnone-opt.ll +++ b/llvm/test/Feature/optnone-opt.ll @@ -41,7 +41,6 @@ attributes #0 = { optnone noinline } ; OPT-O1-DAG: Skipping pass 'Combine redundant instructions' ; OPT-O1-DAG: Skipping pass 'Dead Store Elimination' ; OPT-O1-DAG: Skipping pass 'Early CSE' -; OPT-O1-DAG: Skipping pass 'Early GVN Hoisting of Expressions' ; OPT-O1-DAG: Skipping pass 'Jump Threading' ; OPT-O1-DAG: Skipping pass 'MemCpy Optimization' ; OPT-O1-DAG: Skipping pass 'Reassociate expressions' |
