[ThinLTO] Honor -O{0,1,2,4} passed through the libLTO interface for ThinLTO
This was hardcoded to be O3 till now, without any way to change it
without changing the code.
llvm-svn: 290682
diff --git a/llvm/tools/lto/lto.cpp b/llvm/tools/lto/lto.cpp
index aa61f2a..a1dd4eb 100644
--- a/llvm/tools/lto/lto.cpp
+++ b/llvm/tools/lto/lto.cpp
@@ -465,6 +465,25 @@
ThinLTOCodeGenerator *CodeGen = new ThinLTOCodeGenerator();
CodeGen->setTargetOptions(InitTargetOptionsFromCodeGenFlags());
+ if (OptLevel.getNumOccurrences()) {
+ if (OptLevel < '0' || OptLevel > '3')
+ report_fatal_error("Optimization level must be between 0 and 3");
+ CodeGen->setOptLevel(OptLevel - '0');
+ switch (OptLevel) {
+ case '0':
+ CodeGen->setCodeGenOptLevel(CodeGenOpt::None);
+ break;
+ case '1':
+ CodeGen->setCodeGenOptLevel(CodeGenOpt::Less);
+ break;
+ case '2':
+ CodeGen->setCodeGenOptLevel(CodeGenOpt::Default);
+ break;
+ case '3':
+ CodeGen->setCodeGenOptLevel(CodeGenOpt::Aggressive);
+ break;
+ }
+ }
return wrap(CodeGen);
}