commit ccb1862bc99d293c4b9f397651a8b76ad1efe900
author Alina Sbirlea <asbirlea@google.com> Tue Sep 03 21:20:46 2019 +0000
committer Alina Sbirlea <asbirlea@google.com> Tue Sep 03 21:20:46 2019 +0000
tree b424e61ba4787c5a7569c0b4db3fe36209508c08
parent b19cd27b28438eb76fdf5c1211fcc5a02bb712f9

[MemorySSA] Disable MemorySSA use.

Differential Revision: https://reviews.llvm.org/D58311

llvm-svn: 370821

llvm/lib/Analysis/MemorySSA.cpp

diff --git a/llvm/lib/Analysis/MemorySSA.cpp b/llvm/lib/Analysis/MemorySSA.cpp
index 35a224a..ac95017 100644
--- a/llvm/lib/Analysis/MemorySSA.cpp
+++ b/llvm/lib/Analysis/MemorySSA.cpp
@@ -84,7 +84,7 @@
 #endif
 /// Enables memory ssa as a dependency for loop passes in legacy pass manager.
 cl::opt<bool> llvm::EnableMSSALoopDependency(
-    "enable-mssa-loop-dependency", cl::Hidden, cl::init(true),
+    "enable-mssa-loop-dependency", cl::Hidden, cl::init(false),
     cl::desc("Enable MemorySSA dependency for loop pass manager"));
 
 static cl::opt<bool, true>

llvm/lib/Transforms/Utils/LoopUtils.cpp

diff --git a/llvm/lib/Transforms/Utils/LoopUtils.cpp b/llvm/lib/Transforms/Utils/LoopUtils.cpp
index b4d7f35..4c6c2ed 100644
--- a/llvm/lib/Transforms/Utils/LoopUtils.cpp
+++ b/llvm/lib/Transforms/Utils/LoopUtils.cpp
@@ -19,7 +19,6 @@
 #include "llvm/Analysis/InstructionSimplify.h"
 #include "llvm/Analysis/LoopInfo.h"
 #include "llvm/Analysis/LoopPass.h"
-#include "llvm/Analysis/MemorySSA.h"
 #include "llvm/Analysis/MemorySSAUpdater.h"
 #include "llvm/Analysis/MustExecute.h"
 #include "llvm/Analysis/ScalarEvolution.h"
@@ -171,8 +170,6 @@
   AU.addPreserved<SCEVAAWrapperPass>();
   AU.addRequired<ScalarEvolutionWrapperPass>();
   AU.addPreserved<ScalarEvolutionWrapperPass>();
-  // FIXME: When all loop passes preserve MemorySSA, it can be required and
-  // preserved here instead of the individual handling in each pass.
 }
 
 /// Manually defined generic "LoopPass" dependency initialization. This is used
@@ -193,7 +190,6 @@
   INITIALIZE_PASS_DEPENDENCY(GlobalsAAWrapperPass)
   INITIALIZE_PASS_DEPENDENCY(SCEVAAWrapperPass)
   INITIALIZE_PASS_DEPENDENCY(ScalarEvolutionWrapperPass)
-  INITIALIZE_PASS_DEPENDENCY(MemorySSAWrapperPass)
 }
 
 /// Create MDNode for input string.