[AMDGPU] Switch scalarize global loads ON by default

Differential revision: https://reviews.llvm.org/D34407

llvm-svn: 307026
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp b/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
index 425fd35..0e1b6ea 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
@@ -85,7 +85,7 @@
 static cl::opt<bool> ScalarizeGlobal(
   "amdgpu-scalarize-global-loads",
   cl::desc("Enable global load scalarization"),
-  cl::init(false),
+  cl::init(true),
   cl::Hidden);
 
 // Option to run internalize pass.