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[SelectionDAG] Add a flag to sort DAGs before showing them in debug prints #149732

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[SelectionDAG] Add a flag to sort DAGs before showing them in debug prints #149732

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34 changes: 24 additions & 10 deletions llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -144,6 +144,12 @@ UseMBPI("use-mbpi",
cl::init(true), cl::Hidden);

#ifndef NDEBUG
static cl::opt<bool>
SortDAGBeforeDump("sort-dags-before-isel-dump", cl::Hidden,
cl::desc("Sort SelectionDAGs before showing them in"
" debug prints during SelectionDAGISel."),
cl::init(false));

static cl::opt<std::string>
FilterDAGBasicBlockName("filter-view-dags", cl::Hidden,
cl::desc("Only display the basic block whose name "
Expand Down Expand Up @@ -903,6 +909,14 @@ void SelectionDAGISel::ComputeLiveOutVRegInfo() {
} while (!Worklist.empty());
}

#ifndef NDEBUG
static void dumpSelectionDAG(SelectionDAG *DAG) {
if (SortDAGBeforeDump)
DAG->AssignTopologicalOrder();
DAG->dump();
}
#endif

void SelectionDAGISel::CodeGenAndEmitDAG() {
StringRef GroupName = "sdag";
StringRef GroupDescription = "Instruction Selection and Scheduling";
Expand Down Expand Up @@ -930,7 +944,7 @@ void SelectionDAGISel::CodeGenAndEmitDAG() {
ISEL_DUMP(dbgs() << "\nInitial selection DAG: "
<< printMBBReference(*FuncInfo->MBB) << " '" << BlockName
<< "'\n";
CurDAG->dump());
dumpSelectionDAG(CurDAG));

#if !defined(NDEBUG) && LLVM_ENABLE_ABI_BREAKING_CHECKS
if (TTI->hasBranchDivergence())
Expand All @@ -950,7 +964,7 @@ void SelectionDAGISel::CodeGenAndEmitDAG() {
ISEL_DUMP(dbgs() << "\nOptimized lowered selection DAG: "
<< printMBBReference(*FuncInfo->MBB) << " '" << BlockName
<< "'\n";
CurDAG->dump());
dumpSelectionDAG(CurDAG));

#if !defined(NDEBUG) && LLVM_ENABLE_ABI_BREAKING_CHECKS
if (TTI->hasBranchDivergence())
Expand All @@ -972,7 +986,7 @@ void SelectionDAGISel::CodeGenAndEmitDAG() {
ISEL_DUMP(dbgs() << "\nType-legalized selection DAG: "
<< printMBBReference(*FuncInfo->MBB) << " '" << BlockName
<< "'\n";
CurDAG->dump());
dumpSelectionDAG(CurDAG));

#if !defined(NDEBUG) && LLVM_ENABLE_ABI_BREAKING_CHECKS
if (TTI->hasBranchDivergence())
Expand All @@ -996,7 +1010,7 @@ void SelectionDAGISel::CodeGenAndEmitDAG() {
ISEL_DUMP(dbgs() << "\nOptimized type-legalized selection DAG: "
<< printMBBReference(*FuncInfo->MBB) << " '" << BlockName
<< "'\n";
CurDAG->dump());
dumpSelectionDAG(CurDAG));

#if !defined(NDEBUG) && LLVM_ENABLE_ABI_BREAKING_CHECKS
if (TTI->hasBranchDivergence())
Expand All @@ -1014,7 +1028,7 @@ void SelectionDAGISel::CodeGenAndEmitDAG() {
ISEL_DUMP(dbgs() << "\nVector-legalized selection DAG: "
<< printMBBReference(*FuncInfo->MBB) << " '" << BlockName
<< "'\n";
CurDAG->dump());
dumpSelectionDAG(CurDAG));

#if !defined(NDEBUG) && LLVM_ENABLE_ABI_BREAKING_CHECKS
if (TTI->hasBranchDivergence())
Expand All @@ -1030,7 +1044,7 @@ void SelectionDAGISel::CodeGenAndEmitDAG() {
ISEL_DUMP(dbgs() << "\nVector/type-legalized selection DAG: "
<< printMBBReference(*FuncInfo->MBB) << " '" << BlockName
<< "'\n";
CurDAG->dump());
dumpSelectionDAG(CurDAG));

#if !defined(NDEBUG) && LLVM_ENABLE_ABI_BREAKING_CHECKS
if (TTI->hasBranchDivergence())
Expand All @@ -1050,7 +1064,7 @@ void SelectionDAGISel::CodeGenAndEmitDAG() {
ISEL_DUMP(dbgs() << "\nOptimized vector-legalized selection DAG: "
<< printMBBReference(*FuncInfo->MBB) << " '" << BlockName
<< "'\n";
CurDAG->dump());
dumpSelectionDAG(CurDAG));

#if !defined(NDEBUG) && LLVM_ENABLE_ABI_BREAKING_CHECKS
if (TTI->hasBranchDivergence())
Expand All @@ -1070,7 +1084,7 @@ void SelectionDAGISel::CodeGenAndEmitDAG() {
ISEL_DUMP(dbgs() << "\nLegalized selection DAG: "
<< printMBBReference(*FuncInfo->MBB) << " '" << BlockName
<< "'\n";
CurDAG->dump());
dumpSelectionDAG(CurDAG));

#if !defined(NDEBUG) && LLVM_ENABLE_ABI_BREAKING_CHECKS
if (TTI->hasBranchDivergence())
Expand All @@ -1090,7 +1104,7 @@ void SelectionDAGISel::CodeGenAndEmitDAG() {
ISEL_DUMP(dbgs() << "\nOptimized legalized selection DAG: "
<< printMBBReference(*FuncInfo->MBB) << " '" << BlockName
<< "'\n";
CurDAG->dump());
dumpSelectionDAG(CurDAG));

#if !defined(NDEBUG) && LLVM_ENABLE_ABI_BREAKING_CHECKS
if (TTI->hasBranchDivergence())
Expand All @@ -1114,7 +1128,7 @@ void SelectionDAGISel::CodeGenAndEmitDAG() {
ISEL_DUMP(dbgs() << "\nSelected selection DAG: "
<< printMBBReference(*FuncInfo->MBB) << " '" << BlockName
<< "'\n";
CurDAG->dump());
dumpSelectionDAG(CurDAG));

if (ViewSchedDAGs && MatchFilterBB)
CurDAG->viewGraph("scheduler input for " + BlockName);
Expand Down
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