Index: llvm/trunk/lib/IR/IRBuilder.cpp
===================================================================
--- llvm/trunk/lib/IR/IRBuilder.cpp
+++ llvm/trunk/lib/IR/IRBuilder.cpp
@@ -50,6 +50,7 @@
                                 nullptr, GlobalVariable::NotThreadLocal,
                                 AddressSpace);
   GV->setUnnamedAddr(GlobalValue::UnnamedAddr::Global);
+  GV->setAlignment(1);
   return GV;
 }
 
Index: llvm/trunk/test/Transforms/InstCombine/printf-1.ll
===================================================================
--- llvm/trunk/test/Transforms/InstCombine/printf-1.ll
+++ llvm/trunk/test/Transforms/InstCombine/printf-1.ll
@@ -14,7 +14,7 @@
 @percent_f = constant [3 x i8] c"%f\00"
 @percent_s = constant [4 x i8] c"%s\0A\00"
 @empty = constant [1 x i8] c"\00"
-; CHECK: [[$STR:@[a-z0-9]+]] = private unnamed_addr constant [12 x i8] c"hello world\00"
+; CHECK: [[$STR:@[a-z0-9]+]] = private unnamed_addr constant [12 x i8] c"hello world\00", align 1
 
 declare i32 @printf(i8*, ...)