Index: llvm/trunk/lib/Transforms/Instrumentation/PGOInstrumentation.cpp
===================================================================
--- llvm/trunk/lib/Transforms/Instrumentation/PGOInstrumentation.cpp
+++ llvm/trunk/lib/Transforms/Instrumentation/PGOInstrumentation.cpp
@@ -124,7 +124,7 @@
 
 // Command line option to enable/disable the warning about missing profile
 // information.
-static cl::opt<bool> NoPGOWarnMissing("no-pgo-warn-missing", cl::init(false),
+static cl::opt<bool> NoPGOWarnMissing("no-pgo-warn-missing", cl::init(true),
                                       cl::Hidden);
 
 // Command line option to enable/disable the warning about a hash mismatch in
Index: llvm/trunk/test/Transforms/PGOProfile/diag_no_funcprofdata.ll
===================================================================
--- llvm/trunk/test/Transforms/PGOProfile/diag_no_funcprofdata.ll
+++ llvm/trunk/test/Transforms/PGOProfile/diag_no_funcprofdata.ll
@@ -1,6 +1,6 @@
 ; RUN: llvm-profdata merge %S/Inputs/diag.proftext -o %t.profdata
-; RUN: opt < %s -pgo-instr-use -pgo-test-profile-file=%t.profdata -S 2>&1 | FileCheck %s
-; RUN: opt < %s -passes=pgo-instr-use -pgo-test-profile-file=%t.profdata -S 2>&1 | FileCheck %s
+; RUN: opt < %s -pgo-instr-use -no-pgo-warn-missing=false -pgo-test-profile-file=%t.profdata -S 2>&1 | FileCheck %s
+; RUN: opt < %s -passes=pgo-instr-use -no-pgo-warn-missing=false -pgo-test-profile-file=%t.profdata -S 2>&1 | FileCheck %s
 
 ; CHECK: No profile data available for function bar