fix(FTBFS): clc/clover: pass a VFS instance explicitly

This just replicates what upstream did before breaking mesa with commit
df9a14d7bbf and requiring a VFS instance.

Reported-by: @Lone_Wolf
Reference: <df9a14d7bb>
Closes: <https://gitlab.freedesktop.org/mesa/mesa/-/issues/12223>
Signed-off-by: Kai Wasserbäch <kai@dev.carbon-project.org>
Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>
Reviewed-by: Karol Herbst <kherbst@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32439>

src/compiler/clc/clc_helpers.cpp

@@ -56,6 +56,10 @@
 #include <spirv-tools/linker.hpp>
 #include <spirv-tools/optimizer.hpp>
 
+#if LLVM_VERSION_MAJOR >= 20
+#include <llvm/Support/VirtualFileSystem.h>
+#endif
+
 #include "util/macros.h"
 #include "glsl_types.h"
 
@@ -841,7 +845,11 @@ clc_compile_to_llvm_module(LLVMContext &llvm_ctx,
    // http://www.llvm.org/bugs/show_bug.cgi?id=19735
    c->getDiagnosticOpts().ShowCarets = false;
 
-   c->createDiagnostics(new clang::TextDiagnosticPrinter(
+   c->createDiagnostics(
+#if LLVM_VERSION_MAJOR >= 20
+                   *llvm::vfs::getRealFileSystem(),
+#endif
+                   new clang::TextDiagnosticPrinter(
                            diag_log_stream,
                            &c->getDiagnosticOpts()));
 

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

@@ -40,6 +40,10 @@
 #include <clang/Frontend/TextDiagnosticPrinter.h>
 #include <clang/Basic/TargetInfo.h>
 
+#if LLVM_VERSION_MAJOR >= 20
+#include <llvm/Support/VirtualFileSystem.h>
+#endif
+
 // We need to include internal headers last, because the internal headers
 // include CL headers which have #define's like:
 //
@@ -305,7 +309,11 @@ namespace {
                                 ::llvm::Triple(target.triple),
                                 get_language_version(opts, device_clc_version));
 
-      c->createDiagnostics(new clang::TextDiagnosticPrinter(
+      c->createDiagnostics(
+#if LLVM_VERSION_MAJOR >= 20
+                           *llvm::vfs::getRealFileSystem(),
+#endif
+                           new clang::TextDiagnosticPrinter(
                               *new raw_string_ostream(r_log),
                               &c->getDiagnosticOpts(), true));