vkalintiris added inline comments.
================
Comment at: include/clang/Driver/ToolChain.h:147
@@ -145,1 +146,3 @@
+ const Multilib &getSelectedMultilib() const { return SelectedMultilib; }
+
----------------
atanasyan wrote:
> Do you need public access to this member function?
I discarded this member function after the move of `SelectedMultilib` to the
`MipsToolChain` class.
================
Comment at: lib/Driver/Driver.cpp:2127
@@ +2126,3 @@
+ // Allow the discovery of tools prefixed with LLVM's default target triple.
+ std::string LLVMDefaultTargetTriple = llvm::sys::getDefaultTargetTriple();
+ if (LLVMDefaultTargetTriple != DefaultTargetTriple)
----------------
atanasyan wrote:
> Just curious when is DefaultTargetTriple not equal to LLVMDefaultTargetTriple?
In this case, `DefaultTargetTriple` is the triple specified with `--target=`.
LLVMDefaultTargetTriple is the value specified with the CMake variable
`-DLLVM_DEFAULT_TARGET_TRIPLE=` during configuration time. For example, using
`--target=mips64el-mti-linux` will search for files prefixed with either
`mips64el-mti-linux-{as,ld}` and `mips-mti-linux-{as,ld}` in our toolchain
where we specify `-DLLVM_DEFAULT_TARGET_TRIPLE=mips-mti-linux.`
================
Comment at: lib/Driver/Driver.cpp:2225
@@ -2219,1 +2224,3 @@
TC = new toolchains::HexagonToolChain(*this, Target, Args);
+ else if (Target.getVendor() == llvm::Triple::MipsTechnologies)
+ TC = new toolchains::MipsToolChain(*this, Target, Args);
----------------
atanasyan wrote:
> The `mips-mti-linux-gnu` triple is used by Codescape toolchain too. After
> this change if user provides `-target mips-mti-linux-gnu` command line
> option, the `MipsToolChain` will be used. As far as I understand you have to
> put `GCCInstallation.isValid()` checking to the `MipsToolChain` class methods
> to allow working with both GNU and non-GNU toolchains. IMHO it does not make
> the code clear. Maybe use the `MipsToolChain` class for the non-GNU toolchain
> only.
Shall we change the `MipsToolChain` class name to reflect these changes? Maybe
`MipsNonGNUToolChain`? It would be strange to keep the same name, because most
of the MIPS toolchains wouldn't be instantiated by `MipsToolChain`.
================
Comment at: lib/Driver/ToolChains.cpp:2231
@@ +2230,3 @@
+ // If we did find a valid GCC installation, we don't have anything else to
do.
+ if (GCCInstallation.isValid())
+ return;
----------------
atanasyan wrote:
> When is GCCInstallation invalid in case of using this toolchain?
I changed that, according to your comments earlier. Now we instantiate this
class only for triples that don't have an environment.
http://reviews.llvm.org/D13340
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