[llvm] r277909 - Revert "(refs/bisect/bad) GVN-hoist: enable by default"

[Matthias Braun via llvm-commits]

Author: matze
Date: Fri Aug  5 21:23:15 2016
New Revision: 277909

URL: http://llvm.org/viewvc/llvm-project?rev=277909&view=rev
Log:
Revert "(refs/bisect/bad) GVN-hoist: enable by default"

GVN-Hoist appears to miscompile llvm-testsuite
SingleSource/Benchmarks/Misc/fbench.c at the moment.

I filed http://llvm.org/PR28880

This reverts commit r277786.

Modified:
    llvm/trunk/lib/Transforms/IPO/PassManagerBuilder.cpp
    llvm/trunk/test/Feature/optnone-opt.ll

Modified: llvm/trunk/lib/Transforms/IPO/PassManagerBuilder.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/IPO/PassManagerBuilder.cpp?rev=277909&r1=277908&r2=277909&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/IPO/PassManagerBuilder.cpp (original)
+++ llvm/trunk/lib/Transforms/IPO/PassManagerBuilder.cpp Fri Aug  5 21:23:15 2016
@@ -138,8 +138,8 @@ static cl::opt<int> PreInlineThreshold(
              "(default = 75)"));
 
 static cl::opt<bool> EnableGVNHoist(
-    "enable-gvn-hoist", cl::init(true), cl::Hidden,
-    cl::desc("Enable the GVN hoisting pass (default = on)"));
+    "enable-gvn-hoist", cl::init(false), cl::Hidden,
+    cl::desc("Enable the experimental GVN Hoisting pass"));
 
 PassManagerBuilder::PassManagerBuilder() {
     OptLevel = 2;

Modified: llvm/trunk/test/Feature/optnone-opt.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Feature/optnone-opt.ll?rev=277909&r1=277908&r2=277909&view=diff
==============================================================================
--- llvm/trunk/test/Feature/optnone-opt.ll (original)
+++ llvm/trunk/test/Feature/optnone-opt.ll Fri Aug  5 21:23:15 2016
@@ -41,7 +41,6 @@ attributes #0 = { optnone noinline }
 ; OPT-O1-DAG: Skipping pass 'Combine redundant instructions'
 ; OPT-O1-DAG: Skipping pass 'Dead Store Elimination'
 ; OPT-O1-DAG: Skipping pass 'Early CSE'
-; OPT-O1-DAG: Skipping pass 'Early GVN Hoisting of Expressions'
 ; OPT-O1-DAG: Skipping pass 'Jump Threading'
 ; OPT-O1-DAG: Skipping pass 'MemCpy Optimization'
 ; OPT-O1-DAG: Skipping pass 'Reassociate expressions'