Add a libLTO API to stop/restart ThinLTO between optimizations and CodeGen

This allows the linker to instruct ThinLTO to perform only the
optimization part or only the codegen part of the process.

From: Mehdi Amini <mehdi.amini@apple.com>
llvm-svn: 265113

2 files changed, 14 insertions, 2 deletions

diff --git a/llvm/tools/lto/lto.cpp b/llvm/tools/lto/lto.cpp
index 165b23da024..e22b198b3e1 100644
--- a/llvm/tools/lto/lto.cpp
+++ b/llvm/tools/lto/lto.cpp
@@ -473,6 +473,16 @@ LTOObjectBuffer thinlto_module_get_object(thinlto_code_gen_t cg,
                          MemBuffer->getBufferSize()};
 }
 
+void thinlto_codegen_disable_codegen(thinlto_code_gen_t cg,
+                                     lto_bool_t disable) {
+  unwrap(cg)->disableCodeGen(disable);
+}
+
+void thinlto_codegen_set_codegen_only(thinlto_code_gen_t cg,
+                                      lto_bool_t CodeGenOnly) {
+  unwrap(cg)->setCodeGenOnly(CodeGenOnly);
+}
+
 void thinlto_debug_options(const char *const *options, int number) {
   // if options were requested, set them
   if (number && options) {
@@ -483,7 +493,7 @@ void thinlto_debug_options(const char *const *options, int number) {
   }
 }
 
-bool lto_module_is_thinlto(lto_module_t mod) {
+lto_bool_t lto_module_is_thinlto(lto_module_t mod) {
   return unwrap(mod)->isThinLTO();
 }
 
diff --git a/llvm/tools/lto/lto.exports b/llvm/tools/lto/lto.exports
index e0df0ca0e4f..83a59437e81 100644
--- a/llvm/tools/lto/lto.exports
+++ b/llvm/tools/lto/lto.exports
@@ -61,4 +61,6 @@ thinlto_debug_options
 lto_module_is_thinlto
 thinlto_codegen_add_must_preserve_symbol
 thinlto_codegen_add_cross_referenced_symbol
-thinlto_codegen_set_final_cache_size_relative_to_available_space
\ No newline at end of file
+thinlto_codegen_set_final_cache_size_relative_to_available_space
+thinlto_codegen_set_codegen_only
+thinlto_codegen_disable_codegen
\ No newline at end of file