[Clang][AIX] Add back error for -fprofile-sample-generate/use on AIX

D148177 also removed the error for sampling based profiling which is not currently
supported on AIX. Adding that error back.

Reviewed By: qiongsiwu1

Differential Revision: https://reviews.llvm.org/D148960

Author: ZarkoT

clang/lib/Driver/ToolChains/Clang.cpp

@@ -740,6 +740,12 @@ static void addPGOAndCoverageFlags(const ToolChain &TC, Compilation &C,
     PGOGenerateArg = nullptr;
   }
 
+  if (TC.getTriple().isOSAIX()) {
+    if (Arg *ProfileSampleUseArg = getLastProfileSampleUseArg(Args))
+      D.Diag(diag::err_drv_unsupported_opt_for_target)
+          << ProfileSampleUseArg->getSpelling() << TC.getTriple().str();
+  }
+
   if (ProfileGenerateArg) {
     if (ProfileGenerateArg->getOption().matches(
             options::OPT_fprofile_instr_generate_EQ))

clang/test/Driver/unsupported-option.c

@@ -13,3 +13,7 @@
 // RUN: not %clang --target=powerpc64-ibm-aix %s -mlong-double-128 2>&1 | \
 // RUN: FileCheck %s --check-prefix=AIX64-LONGDOUBLE128-ERR
 // AIX64-LONGDOUBLE128-ERR: error: unsupported option '-mlong-double-128' for target 'powerpc64-ibm-aix'
+
+// RUN: not %clang -fprofile-sample-use=code.prof --target=powerpc-ibm-aix %s 2>&1 | \
+// RUN: FileCheck %s --check-prefix=AIX-PROFILE-SAMPLE
+// AIX-PROFILE-SAMPLE: error: unsupported option '-fprofile-sample-use=' for target