[llvm] r276479 - Add flag to PassManagerBuilder to disable GVN Hoist Pass.
Alina Sbirlea via llvm-commits
llvm-commits at lists.llvm.org
Fri Jul 22 15:02:19 PDT 2016
Author: asbirlea
Date: Fri Jul 22 17:02:19 2016
New Revision: 276479
URL: http://llvm.org/viewvc/llvm-project?rev=276479&view=rev
Log:
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
Modified:
llvm/trunk/lib/Transforms/IPO/PassManagerBuilder.cpp
llvm/trunk/test/Feature/optnone-opt.ll
Modified: llvm/trunk/lib/Transforms/IPO/PassManagerBuilder.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/IPO/PassManagerBuilder.cpp?rev=276479&r1=276478&r2=276479&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/IPO/PassManagerBuilder.cpp (original)
+++ llvm/trunk/lib/Transforms/IPO/PassManagerBuilder.cpp Fri Jul 22 17:02:19 2016
@@ -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::populateFunctio
FPM.add(createCFGSimplificationPass());
FPM.add(createSROAPass());
FPM.add(createEarlyCSEPass());
- FPM.add(createGVNHoistPass());
+ if(EnableGVNHoist)
+ FPM.add(createGVNHoistPass());
FPM.add(createLowerExpectIntrinsicPass());
}
Modified: llvm/trunk/test/Feature/optnone-opt.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Feature/optnone-opt.ll?rev=276479&r1=276478&r2=276479&view=diff
==============================================================================
--- llvm/trunk/test/Feature/optnone-opt.ll (original)
+++ llvm/trunk/test/Feature/optnone-opt.ll Fri Jul 22 17:02:19 2016
@@ -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'
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