[clang-cl] Handle -O correctly
We had multiple bugs here:
- We didn't support multiple optimization options in one argument.
e.g. -O2y-
- We didn't correctly expand -O[12dx] to their respective options.
- We treated -O1 as clang -O1 instead of clang -Os.
- We treated -Ox as clang -O3 instead of clang -O2. In fact, cl's -Ox
option is *less* powerful than cl's -O2 option despite -Ox described
as "Full Optimization".
This fixes PR24003.
llvm-svn: 243261
diff --git a/clang/lib/Driver/ToolChains.h b/clang/lib/Driver/ToolChains.h
index 8e62674..27944c8 100644
--- a/clang/lib/Driver/ToolChains.h
+++ b/clang/lib/Driver/ToolChains.h
@@ -811,6 +811,10 @@
MSVCToolChain(const Driver &D, const llvm::Triple &Triple,
const llvm::opt::ArgList &Args);
+ llvm::opt::DerivedArgList *
+ TranslateArgs(const llvm::opt::DerivedArgList &Args,
+ const char *BoundArch) const override;
+
bool IsIntegratedAssemblerDefault() const override;
bool IsUnwindTablesDefault() const override;
bool isPICDefault() const override;