[SCEV] Make SCEV verification available from command line with new PM

New pass manager doesn't use verifyAnalysis, so currently there is no
way to call SCEV verification from command line when new PM is used.
This patch adds a pass that allows you to do that.

Reviewers: reames, fhahn, sanjoy.google, nikic

Reviewed By: fhahn

Subscribers: hiraditya, javed.absar, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D70423

include/llvm/Analysis/ScalarEvolution.h

@@ -1922,6 +1922,13 @@ public:
   ScalarEvolution run(Function &F, FunctionAnalysisManager &AM);
 };
 
+/// Verifier pass for the \c ScalarEvolutionAnalysis results.
+class ScalarEvolutionVerifierPass
+    : public PassInfoMixin<ScalarEvolutionVerifierPass> {
+public:
+  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+};
+
 /// Printer pass for the \c ScalarEvolutionAnalysis results.
 class ScalarEvolutionPrinterPass
     : public PassInfoMixin<ScalarEvolutionPrinterPass> {

lib/Analysis/ScalarEvolution.cpp

@@ -12040,6 +12040,12 @@ ScalarEvolution ScalarEvolutionAnalysis::run(Function &F,
                          AM.getResult<LoopAnalysis>(F));
 }
 
+PreservedAnalyses
+ScalarEvolutionVerifierPass::run(Function &F, FunctionAnalysisManager &AM) {
+  AM.getResult<ScalarEvolutionAnalysis>(F).verify();
+  return PreservedAnalyses::all();
+}
+
 PreservedAnalyses
 ScalarEvolutionPrinterPass::run(Function &F, FunctionAnalysisManager &AM) {
   AM.getResult<ScalarEvolutionAnalysis>(F).print(OS);

lib/Passes/PassRegistry.def

@@ -240,6 +240,7 @@ FUNCTION_PASS("verify<loops>", LoopVerifierPass())
 FUNCTION_PASS("verify<memoryssa>", MemorySSAVerifierPass())
 FUNCTION_PASS("verify<regions>", RegionInfoVerifierPass())
 FUNCTION_PASS("verify<safepoint-ir>", SafepointIRVerifierPass())
+FUNCTION_PASS("verify<scalar-evolution>", ScalarEvolutionVerifierPass())
 FUNCTION_PASS("view-cfg", CFGViewerPass())
 FUNCTION_PASS("view-cfg-only", CFGOnlyViewerPass())
 FUNCTION_PASS("transform-warning", WarnMissedTransformationsPass())