[Clang][Driver][SamplePGO] Enable -fsample-profile-use-profi by default for SamplePGO

Author: nilanjana87

clang/lib/Driver/ToolChains/Clang.cpp

@@ -6282,7 +6282,7 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
 
   if (getLastProfileSampleUseArg(Args) &&
       Args.hasFlag(options::OPT_fsample_profile_use_profi,
-                   options::OPT_fno_sample_profile_use_profi, false)) {
+                   options::OPT_fno_sample_profile_use_profi, true)) {
     CmdArgs.push_back("-mllvm");
     CmdArgs.push_back("-sample-profile-use-profi");
   }

clang/test/Driver/pgo-sample-use-profi.c

@@ -2,11 +2,11 @@
 /// Ensure that profi flag is disabled by default
 
 // Target specific checks:
-// RUN: %clang --target=x86_64 -c -fprofile-sample-use=/dev/null -### %s 2>&1 | FileCheck %s --check-prefixes=CHECK-NO-PROFI
-// RUN: %clang --target=AArch64 -c -fprofile-sample-use=/dev/null -### %s 2>&1 | FileCheck %s --check-prefixes=CHECK-NO-PROFI
+// RUN: %clang --target=x86_64 -c -fprofile-sample-use=/dev/null -### %s 2>&1 | FileCheck %s
+// RUN: %clang --target=AArch64 -c -fprofile-sample-use=/dev/null -### %s 2>&1 | FileCheck %s
 
 // Target agnostic checks:
-// RUN: %clang -c -fprofile-sample-use=/dev/null -### %s 2>&1 | FileCheck %s --check-prefixes=CHECK-NO-PROFI
+// RUN: %clang -c -fprofile-sample-use=/dev/null -### %s 2>&1 | FileCheck %s
 // RUN: %clang -c -fsample-profile-use-profi -fprofile-sample-use=/dev/null -### %s 2>&1 | FileCheck %s
 // RUN: %clang -c -fno-sample-profile-use-profi -fsample-profile-use-profi -fprofile-sample-use=/dev/null -### %s 2>&1 | FileCheck %s