[Profile] Always build profile runtime library with -fPIC.

This change removes libclang_rt.profile-pic-<arch>.a version of
profile runtime. Instead, it's sufficient to always build
libclang_rt.profile-<arch>.a with -fPIC, as it can be linked into
both executables and shared objects.

llvm-svn: 221952

clang/lib/Driver/Tools.cpp

@@ -2181,16 +2181,10 @@ static void addProfileRT(
         Args.hasArg(options::OPT_coverage)))
     return;
 
-  // -fprofile-instr-generate requires position-independent code to build with
-  // shared objects.  Link against the right archive.
-  const char *Lib = "libclang_rt.profile-";
-  if (Args.hasArg(options::OPT_fprofile_instr_generate) &&
-      Args.hasArg(options::OPT_shared))
-    Lib = "libclang_rt.profile-pic-";
-
   SmallString<128> LibProfile = getCompilerRTLibDir(TC);
-  llvm::sys::path::append(LibProfile,
+  llvm::sys::path::append(LibProfile, Twine("libclang_rt.profile-") +
-      Twine(Lib) + getArchNameForCompilerRTLib(TC) + ".a");
+                                          getArchNameForCompilerRTLib(TC) +
+                                          ".a");
 
   CmdArgs.push_back(Args.MakeArgString(LibProfile));
 }

clang/test/Driver/instrprof-ld.c

@@ -35,7 +35,7 @@
 // RUN:   | FileCheck --check-prefix=CHECK-LINUX-I386-SHARED %s
 //
 // CHECK-LINUX-I386-SHARED: "{{(.*[^-.0-9A-Z_a-z])?}}ld{{(.exe)?}}"
-// CHECK-LINUX-I386-SHARED: "{{.*}}/Inputs/resource_dir{{/|\\\\}}lib{{/|\\\\}}linux{{/|\\\\}}libclang_rt.profile-pic-i386.a" {{.*}} "-lc"
+// CHECK-LINUX-I386-SHARED: "{{.*}}/Inputs/resource_dir{{/|\\\\}}lib{{/|\\\\}}linux{{/|\\\\}}libclang_rt.profile-i386.a" {{.*}} "-lc"
 //
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     -shared \
@@ -45,7 +45,7 @@
 // RUN:   | FileCheck --check-prefix=CHECK-LINUX-X86-64-SHARED %s
 //
 // CHECK-LINUX-X86-64-SHARED: "{{(.*[^-.0-9A-Z_a-z])?}}ld{{(.exe)?}}"
-// CHECK-LINUX-X86-64-SHARED: "{{.*}}/Inputs/resource_dir{{/|\\\\}}lib{{/|\\\\}}linux{{/|\\\\}}libclang_rt.profile-pic-x86_64.a" {{.*}} "-lc"
+// CHECK-LINUX-X86-64-SHARED: "{{.*}}/Inputs/resource_dir{{/|\\\\}}lib{{/|\\\\}}linux{{/|\\\\}}libclang_rt.profile-x86_64.a" {{.*}} "-lc"
 //
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     -shared \
@@ -55,4 +55,4 @@
 // RUN:   | FileCheck --check-prefix=CHECK-FREEBSD-X86-64-SHARED %s
 //
 // CHECK-FREEBSD-X86-64-SHARED: "{{(.*[^-.0-9A-Z_a-z])?}}ld{{(.exe)?}}"
-// CHECK-FREEBSD-X86-64-SHARED: "{{.*}}/Inputs/resource_dir{{/|\\\\}}lib{{/|\\\\}}freebsd{{/|\\\\}}libclang_rt.profile-pic-x86_64.a"
+// CHECK-FREEBSD-X86-64-SHARED: "{{.*}}/Inputs/resource_dir{{/|\\\\}}lib{{/|\\\\}}freebsd{{/|\\\\}}libclang_rt.profile-x86_64.a"

compiler-rt/lib/profile/CMakeLists.txt

@@ -17,13 +17,9 @@ if(APPLE)
 else()
   foreach(arch ${PROFILE_SUPPORTED_ARCH})
     add_compiler_rt_runtime(clang_rt.profile-${arch} ${arch} STATIC
-      SOURCES ${PROFILE_SOURCES})
-    add_dependencies(profile clang_rt.profile-${arch})
-
-    add_compiler_rt_runtime(clang_rt.profile-pic-${arch} ${arch} STATIC
       CFLAGS -fPIC
       SOURCES ${PROFILE_SOURCES})
-    add_dependencies(profile clang_rt.profile-pic-${arch})
+    add_dependencies(profile clang_rt.profile-${arch})
   endforeach()
 endif()