clover: Pass device to llvm::create_compiler_instance

We'll be using dev.device_clc_version to select the default language version
soon along with the existing ir_target field.

Signed-off-by: Aaron Watry <awatry@gmail.com>
Reviewed-by: Pierre Moreau <pierre.morrow@free.fr>
Reviewed-by: Jan Vesely <jan.vesely@rutgers.edu>
Reviewed-by: Francisco Jerez <currojerez@riseup.net>

v4: Pass the device down instead of device_clc_version as a separate field
v3: Revise to acknowledge that we now have the device in compile/link_program
    instead of the string values.
v2: (Pierre) Move changes to create_compiler_instance invocation to correct
    patch to prevent temporary build breakage.
    (Jan) Use device_clc_version instead of device_version for compile/link

src/gallium/state_trackers/clover/llvm/invocation.cpp

@@ -94,7 +94,7 @@ namespace {
    }
 
    std::unique_ptr<clang::CompilerInstance>
-   create_compiler_instance(const target &target,
+   create_compiler_instance(const device &dev,
                             const std::vector<std::string> &opts,
                             std::string &r_log) {
       std::unique_ptr<clang::CompilerInstance> c { new clang::CompilerInstance };
@@ -108,6 +108,8 @@ namespace {
       const std::vector<const char *> copts =
          map(std::mem_fn(&std::string::c_str), opts);
 
+      const target &target = dev.ir_target();
+
       if (!clang::CompilerInvocation::CreateFromArgs(
              c->getInvocation(), copts.data(), copts.data() + copts.size(), diag))
          throw invalid_build_options_error();
@@ -208,8 +210,7 @@ clover::llvm::compile_program(const std::string &source,
       debug::log(".cl", "// Options: " + opts + '\n' + source);
 
    auto ctx = create_context(r_log);
-   auto c = create_compiler_instance(dev.ir_target(),
-                                     tokenize(opts + " input.cl"), r_log);
+   auto c = create_compiler_instance(dev, tokenize(opts + " input.cl"), r_log);
    auto mod = compile(*ctx, *c, "input.cl", source, headers, dev.ir_target(),
                       opts, r_log);
 
@@ -276,7 +277,7 @@ clover::llvm::link_program(const std::vector<module> &modules,
    erase_if(equals("-create-library"), options);
 
    auto ctx = create_context(r_log);
-   auto c = create_compiler_instance(dev.ir_target(), options, r_log);
+   auto c = create_compiler_instance(dev, options, r_log);
    auto mod = link(*ctx, *c, modules, r_log);
 
    optimize(*mod, c->getCodeGenOpts().OptimizationLevel, !create_library);