r365808 - [Driver] -noprofilelib flag

[Petr Hosek via cfe-commits]

Author: phosek
Date: Thu Jul 11 12:06:38 2019
New Revision: 365808

URL: http://llvm.org/viewvc/llvm-project?rev=365808&view=rev
Log:
[Driver] -noprofilelib flag

This flag is analoguous to other flags like -nostdlib or -nolibc
and could be used to disable linking of profile runtime library.
This is useful in certain environments like kernel, where profile
instrumentation is still desirable, but we cannot use the standard
runtime library.

Added:
    cfe/trunk/test/Driver/noprofilelib.c
Modified:
    cfe/trunk/docs/ClangCommandLineReference.rst
    cfe/trunk/include/clang/Driver/Options.td
    cfe/trunk/lib/Driver/ToolChain.cpp

Modified: cfe/trunk/docs/ClangCommandLineReference.rst
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/docs/ClangCommandLineReference.rst?rev=365808&r1=365807&r2=365808&view=diff
==============================================================================
--- cfe/trunk/docs/ClangCommandLineReference.rst (original)
+++ cfe/trunk/docs/ClangCommandLineReference.rst Thu Jul 11 12:06:38 2019
@@ -346,6 +346,8 @@ Disable builtin #include directories
 
 .. option:: -noprebind
 
+.. option:: -noprofilelib
+
 .. option:: -noseglinkedit
 
 .. option:: -nostartfiles

Modified: cfe/trunk/include/clang/Driver/Options.td
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Driver/Options.td?rev=365808&r1=365807&r2=365808&view=diff
==============================================================================
--- cfe/trunk/include/clang/Driver/Options.td (original)
+++ cfe/trunk/include/clang/Driver/Options.td Thu Jul 11 12:06:38 2019
@@ -2512,6 +2512,7 @@ def nomultidefs : Flag<["-"], "nomultide
 def nopie : Flag<["-"], "nopie">;
 def no_pie : Flag<["-"], "no-pie">, Alias<nopie>;
 def noprebind : Flag<["-"], "noprebind">;
+def noprofilelib : Flag<["-"], "noprofilelib">;
 def noseglinkedit : Flag<["-"], "noseglinkedit">;
 def nostartfiles : Flag<["-"], "nostartfiles">;
 def nostdinc : Flag<["-"], "nostdinc">, Flags<[CoreOption]>;

Modified: cfe/trunk/lib/Driver/ToolChain.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/ToolChain.cpp?rev=365808&r1=365807&r2=365808&view=diff
==============================================================================
--- cfe/trunk/lib/Driver/ToolChain.cpp (original)
+++ cfe/trunk/lib/Driver/ToolChain.cpp Thu Jul 11 12:06:38 2019
@@ -450,6 +450,9 @@ std::string ToolChain::getArchSpecificLi
 }
 
 bool ToolChain::needsProfileRT(const ArgList &Args) {
+  if (Args.hasArg(options::OPT_noprofilelib))
+    return false;
+
   if (needsGCovInstrumentation(Args) ||
       Args.hasArg(options::OPT_fprofile_generate) ||
       Args.hasArg(options::OPT_fprofile_generate_EQ) ||

Added: cfe/trunk/test/Driver/noprofilelib.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Driver/noprofilelib.c?rev=365808&view=auto
==============================================================================
--- cfe/trunk/test/Driver/noprofilelib.c (added)
+++ cfe/trunk/test/Driver/noprofilelib.c Thu Jul 11 12:06:38 2019
@@ -0,0 +1,5 @@
+// RUN: %clang -target i686-pc-linux-gnu -### %s 2>&1 \
+// RUN:     -fprofile-generate -noprofilelib | FileCheck %s
+// RUN: %clang -target i686-pc-linux-gnu -### %s 2>&1 \
+// RUN:     -fprofile-instr-generate -noprofilelib | FileCheck %s
+// CHECK-NOT: clang_rt.profile