[ORC-RT] Drop the 'clang_rt.' prefix from the ORC runtime.

The ORC runtime isn't used by clang -- the prefix was just cargo-culted with
the rest of the XRay config when the ORC runtime was introduced. We now want to
make parts of it available for clients to link directly, so this seems like a
good time to fix the name.

compiler-rt/include/CMakeLists.txt

@@ -37,7 +37,7 @@ endif(COMPILER_RT_BUILD_XRAY)
 
 if (COMPILER_RT_BUILD_ORC)
   set(ORC_HEADERS
-    orc/c_api.h
+    orc_rt/c_api.h
     )
 endif(COMPILER_RT_BUILD_ORC)
 

compiler-rt/lib/orc/CMakeLists.txt

@@ -108,7 +108,7 @@ if (APPLE)
     CFLAGS ${ORC_CFLAGS}
     DEPS ${ORC_DEPS})
 
-  add_compiler_rt_runtime(clang_rt.orc
+  add_compiler_rt_runtime(orc_rt
     STATIC
     OS ${ORC_SUPPORTED_OS}
     ARCHS ${ORC_SUPPORTED_ARCH}
@@ -167,7 +167,7 @@ else() # not Apple
       DEPS ${ORC_DEPS})
 
     # Common ORC archive for instrumented binaries.
-    add_compiler_rt_runtime(clang_rt.orc
+    add_compiler_rt_runtime(orc_rt
       ${ORC_BUILD_TYPE}
       ARCHS ${arch}
       CFLAGS ${ORC_CFLAGS}

compiler-rt/test/orc/lit.cfg.py

@@ -20,9 +20,9 @@ llvm_jitlink = os.path.join(config.llvm_tools_dir, 'llvm-jitlink')
 orc_rt_executor_stem = os.path.join(config.compiler_rt_obj_root, 'lib/orc/tests/tools/orc-rt-executor')
 lli = os.path.join(config.llvm_tools_dir, 'lli')
 if config.host_os == 'Darwin':
-  orc_rt_path = '%s/libclang_rt.orc_osx.a' % config.compiler_rt_libdir
+  orc_rt_path = '%s/liborc_rt_osx.a' % config.compiler_rt_libdir
 else:
-  orc_rt_path = '%s/libclang_rt.orc%s.a' % (config.compiler_rt_libdir, config.target_suffix)
+  orc_rt_path = '%s/liborc_rt%s.a' % (config.compiler_rt_libdir, config.target_suffix)
 
 if config.libunwind_shared:
   config.available_features.add('libunwind-available')