commit 3633fe4e7dc8a4acaea0d9911c86683b51c1db2b
author Santiago Aboy Solanes <solanes@google.com> Thu Jan 12 16:10:05 2023 +0000
committer Santiago Aboy Solanes <solanes@google.com> Mon Jan 30 10:21:34 2023 +0000
tree ca7fd3a8ae28231aa6d120f14900c44b528ecefb
parent b6c230117d189c79eaf7e063f2f3fa5fec399aca

Skip InductionVarAnalysis for a pathological case

Having a long chain of loop header phis hangs up the compiler.

Note that we can still compile the method if we skip the
InductionVarAnalysis phase.

Bug: 246249941
Fixes: 246249941
Bug: 32545907
Test: art/test/testrunner/testrunner.py --host --64 --optimizing -b
Test: dex2oat compile the app in 246249941
Change-Id: Id2d14b1c4d787f98d656055274c7cfcae6491686

compiler/optimizing/optimization.cc

diff --git a/compiler/optimizing/optimization.cc b/compiler/optimizing/optimization.cc
index 73a4751..e1b97b4 100644
--- a/compiler/optimizing/optimization.cc
+++ b/compiler/optimizing/optimization.cc
@@ -197,7 +197,8 @@
         opt = most_recent_side_effects = new (allocator) SideEffectsAnalysis(graph, pass_name);
         break;
       case OptimizationPass::kInductionVarAnalysis:
-        opt = most_recent_induction = new (allocator) HInductionVarAnalysis(graph, pass_name);
+        opt = most_recent_induction =
+            new (allocator) HInductionVarAnalysis(graph, stats, pass_name);
         break;
       //
       // Passes that need prior analysis.