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[NewGVN] Add a flag to enable the pass via -mllvm.

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NewGVN can be tested passing `-mllvm -enable-newgvn` to clang.

Differential Revision:  https://reviews.llvm.org/D28059

llvm-svn: 290548
This commit is contained in:
Davide Italiano 2016-12-26 18:26:19 +00:00
parent cd290494fd
commit ab547de775
2 changed files with 15 additions and 4 deletions
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1
include/llvm/Transforms/IPO/PassManagerBuilder.h
View File

@ -132,6 +132,7 @@ public:
bool LoopVectorize;
bool RerollLoops;
bool LoadCombine;
bool NewGVN;
bool DisableGVNLoadPRE;
bool VerifyInput;
bool VerifyOutput;

18
lib/Transforms/IPO/PassManagerBuilder.cpp
View File

@ -75,6 +75,9 @@ static cl::opt<bool> RunLoadCombine("combine-loads", cl::init(false),
cl::Hidden,
cl::desc("Run the load combining pass"));
static cl::opt<bool> RunNewGVN("enable-newgvn", cl::init(false), cl::Hidden,
cl::desc("Run the NewGVN pass"));
static cl::opt<bool>
RunSLPAfterLoopVectorization("run-slp-after-loop-vectorization",
cl::init(true), cl::Hidden,
@ -162,6 +165,7 @@ PassManagerBuilder::PassManagerBuilder() {
LoopVectorize = RunLoopVectorization;
RerollLoops = RunLoopRerolling;
LoadCombine = RunLoadCombine;
NewGVN = RunNewGVN;
DisableGVNLoadPRE = false;
VerifyInput = false;
VerifyOutput = false;
@ -328,7 +332,8 @@ void PassManagerBuilder::addFunctionSimplificationPasses(
if (OptLevel > 1) {
if (EnableMLSM)
MPM.add(createMergedLoadStoreMotionPass()); // Merge ld/st in diamonds
MPM.add(createGVNPass(DisableGVNLoadPRE)); // Remove redundancies
MPM.add(NewGVN ? createNewGVNPass()
: createGVNPass(DisableGVNLoadPRE)); // Remove redundancies
}
MPM.add(createMemCpyOptPass()); // Remove memcpy / form memset
MPM.add(createSCCPPass()); // Constant prop with SCCP
@ -360,7 +365,9 @@ void PassManagerBuilder::addFunctionSimplificationPasses(
addInstructionCombiningPass(MPM);
addExtensionsToPM(EP_Peephole, MPM);
if (OptLevel > 1 && UseGVNAfterVectorization)
MPM.add(createGVNPass(DisableGVNLoadPRE)); // Remove redundancies
MPM.add(NewGVN
? createNewGVNPass()
: createGVNPass(DisableGVNLoadPRE)); // Remove redundancies
else
MPM.add(createEarlyCSEPass()); // Catch trivial redundancies
@ -605,7 +612,9 @@ void PassManagerBuilder::populateModulePassManager(
addInstructionCombiningPass(MPM);
addExtensionsToPM(EP_Peephole, MPM);
if (OptLevel > 1 && UseGVNAfterVectorization)
MPM.add(createGVNPass(DisableGVNLoadPRE)); // Remove redundancies
MPM.add(NewGVN
? createNewGVNPass()
: createGVNPass(DisableGVNLoadPRE)); // Remove redundancies
else
MPM.add(createEarlyCSEPass()); // Catch trivial redundancies
@ -757,7 +766,8 @@ void PassManagerBuilder::addLTOOptimizationPasses(legacy::PassManagerBase &PM) {
PM.add(createLICMPass()); // Hoist loop invariants.
if (EnableMLSM)
PM.add(createMergedLoadStoreMotionPass()); // Merge ld/st in diamonds.
PM.add(createGVNPass(DisableGVNLoadPRE)); // Remove redundancies.
PM.add(NewGVN ? createNewGVNPass()
: createGVNPass(DisableGVNLoadPRE)); // Remove redundancies.
PM.add(createMemCpyOptPass()); // Remove dead memcpys.
// Nuke dead stores.