Restrict the use of ConstantFolding's VisitIf

It was taking a lot of time for the improvement it got. We can get
99.99% of the improvement, with only one VisitIf call. This is
roughly 20% of the compile time it used to take.

Bug: 278626992
Fixes: 278626992
Test: art/test/testrunner/testrunner.py --host --64 --optimizing -b
Change-Id: Icc00c9ad6a9eb4f4fd18677bcb65655cbbe9d027

1 files changed, 5 insertions, 0 deletions

diff --git a/compiler/optimizing/optimization.cc b/compiler/optimizing/optimization.cc
index e1b97b4aac..12e9a1046d 100644
--- a/compiler/optimizing/optimization.cc
+++ b/compiler/optimizing/optimization.cc
@@ -77,6 +77,7 @@ const char* OptimizationPassName(OptimizationPass pass) {
       return BoundsCheckElimination::kBoundsCheckEliminationPassName;
     case OptimizationPass::kLoadStoreElimination:
       return LoadStoreElimination::kLoadStoreEliminationPassName;
+    case OptimizationPass::kAggressiveConstantFolding:
     case OptimizationPass::kConstantFolding:
       return HConstantFolding::kConstantFoldingPassName;
     case OptimizationPass::kDeadCodeElimination:
@@ -227,6 +228,10 @@ ArenaVector<HOptimization*> ConstructOptimizations(
       case OptimizationPass::kConstantFolding:
         opt = new (allocator) HConstantFolding(graph, stats, pass_name);
         break;
+      case OptimizationPass::kAggressiveConstantFolding:
+        opt = new (allocator)
+            HConstantFolding(graph, stats, pass_name, /* use_all_optimizations_ = */ true);
+        break;
       case OptimizationPass::kDeadCodeElimination:
         opt = new (allocator) HDeadCodeElimination(graph, stats, pass_name);
         break;