From: Davide Italiano <davide@freebsd.org>
Date: Sat, 3 Jun 2017 23:18:29 +0000 (+0000)
Subject: [PM] Add GVNSink to the pipeline.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=653044e2ac52030fb912cc4510e0e83ab135573b;p=llvm

[PM] Add GVNSink to the pipeline.

With this, the two pipelines should be in sync again (modulo
LoopUnswitch, but Chandler is actively working on that).

Differential Revision:  https://reviews.llvm.org/D33810

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@304671 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Passes/PassBuilder.cpp b/lib/Passes/PassBuilder.cpp
index 17c60348633..1f638e76830 100644
--- a/lib/Passes/PassBuilder.cpp
+++ b/lib/Passes/PassBuilder.cpp
@@ -164,6 +164,10 @@ static cl::opt<bool> EnableGVNHoist(
     "enable-npm-gvn-hoist", cl::init(false), cl::Hidden,
     cl::desc("Enable the GVN hoisting pass for the new PM (default = off)"));
 
+static cl::opt<bool> EnableGVNSink(
+    "enable-npm-gvn-sink", cl::init(false), cl::Hidden,
+    cl::desc("Enable the GVN hoisting pass for the new PM (default = off)"));
+
 static Regex DefaultAliasRegex(
     "^(default|thinlto-pre-link|thinlto|lto-pre-link|lto)<(O[0123sz])>$");
 
@@ -314,6 +318,12 @@ PassBuilder::buildFunctionSimplificationPipeline(OptimizationLevel Level,
   if (EnableGVNHoist)
     FPM.addPass(GVNHoistPass());
 
+  // Global value numbering based sinking.
+  if (EnableGVNSink) {
+    FPM.addPass(GVNSinkPass());
+    FPM.addPass(SimplifyCFGPass());
+  }
+
   // Speculative execution if the target has divergent branches; otherwise nop.
   FPM.addPass(SpeculativeExecutionPass());