llvmbot wrote:

<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: Alex Baretta (alexbaretta)

<details>
<summary>Changes</summary>

With this change, clangd interprets .cuh and .hiph extensions as header files 
for CUDA and HIP respectively. This is necessary to allow clangd to correctly 
determine the compile command for these header file types.

This solution is inelegant, as it forces the user to use .cuh and .hiph 
extensions for these header types, and while .cuh is fairly standard, to the 
best of my knowledge there is no standard extension for HIP header files. I 
believe a better solution would be to pass the HIP/CUDA extensions to clangd 
via the configuration file mechanism.

---
Full diff: https://github.com/llvm/llvm-project/pull/148973.diff


6 Files Affected:

- (modified) clang-tools-extra/clangd/HeaderSourceSwitch.cpp (+2-2) 
- (modified) clang/include/clang/Driver/Types.def (+4) 
- (modified) clang/lib/Driver/Types.cpp (+8) 
- (modified) clang/lib/Frontend/FrontendOptions.cpp (+2-2) 
- (modified) clang/lib/InstallAPI/HeaderFile.cpp (+1-1) 
- (modified) clang/lib/Tooling/InterpolatingCompilationDatabase.cpp (+8-3) 


``````````diff
diff --git a/clang-tools-extra/clangd/HeaderSourceSwitch.cpp 
b/clang-tools-extra/clangd/HeaderSourceSwitch.cpp
index d54c3668570eb..e5d62ff68627a 100644
--- a/clang-tools-extra/clangd/HeaderSourceSwitch.cpp
+++ b/clang-tools-extra/clangd/HeaderSourceSwitch.cpp
@@ -21,10 +21,10 @@ namespace clangd {
 std::optional<Path> getCorrespondingHeaderOrSource(
     PathRef OriginalFile, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> VFS) 
{
   llvm::StringRef SourceExtensions[] = {".cpp", ".c", ".cc", ".cxx",
-                                        ".c++", ".m", ".mm"};
+                                        ".c++", ".m", ".mm", ".cu", ".hip"};
   llvm::StringRef HeaderExtensions[] = {".h",    ".hh",   ".hpp", ".hxx",
                                         ".inc",  ".cppm", ".ccm", ".cxxm",
-                                        ".c++m", ".ixx"};
+                                        ".c++m", ".ixx", ".cuh", ".hiph"};
 
   llvm::StringRef PathExt = llvm::sys::path::extension(OriginalFile);
 
diff --git a/clang/include/clang/Driver/Types.def 
b/clang/include/clang/Driver/Types.def
index 76944ec656917..2dc047716dcaa 100644
--- a/clang/include/clang/Driver/Types.def
+++ b/clang/include/clang/Driver/Types.def
@@ -58,6 +58,10 @@ TYPE("objective-c++",            ObjCXX,       PP_ObjCXX,    
   "mm",     phases
 TYPE("hlsl",                     HLSL,         PP_CXX,          "hlsl",   
phases::Preprocess, phases::Compile, phases::Backend, phases::Assemble)
 
 // C family input files to precompile.
+TYPE("cuda-header-cpp-output",   PP_CUDA_Header, INVALID,       "cuih",   
phases::Precompile)
+TYPE("cuda-header",              CUDA_Header,  PP_CUDA_Header,  "cuh",    
phases::Preprocess, phases::Precompile)
+TYPE("hip-header-cpp-output",    PP_HIP_Header, INVALID,        "hiphi",  
phases::Precompile)
+TYPE("hip-header",               HIP_Header,   PP_HIP_Header,   "hiph",   
phases::Preprocess, phases::Precompile)
 TYPE("c-header-cpp-output",      PP_CHeader,   INVALID,         "i",      
phases::Precompile)
 TYPE("c-header",                 CHeader,      PP_CHeader,      "h",      
phases::Preprocess, phases::Precompile)
 TYPE("cl-header",                CLHeader,     PP_CHeader,      "h",      
phases::Preprocess, phases::Precompile)
diff --git a/clang/lib/Driver/Types.cpp b/clang/lib/Driver/Types.cpp
index 08866e89ea447..24fcf1fbd9c02 100644
--- a/clang/lib/Driver/Types.cpp
+++ b/clang/lib/Driver/Types.cpp
@@ -329,6 +329,7 @@ types::ID types::lookupTypeForExtension(llvm::StringRef 
Ext) {
       .Case("clii", TY_PP_CLCXX)
       .Case("cp", TY_CXX)
       .Case("cu", TY_CUDA)
+      .Case("cuh", TY_CUDA_Header)
       .Case("hh", TY_CXXHeader)
       .Case("ii", TY_PP_CXX)
       .Case("ll", TY_LLVM_IR)
@@ -361,6 +362,7 @@ types::ID types::lookupTypeForExtension(llvm::StringRef 
Ext) {
       .Case("gch", TY_PCH)
       .Case("hip", TY_HIP)
       .Case("hipi", TY_PP_HIP)
+      .Case("hiph", TY_HIP_Header)
       .Case("hpp", TY_CXXHeader)
       .Case("hxx", TY_CXXHeader)
       .Case("iim", TY_PP_CXXModule)
@@ -443,5 +445,11 @@ ID types::lookupHeaderTypeForSourceType(ID Id) {
   case types::TY_CL:
   case types::TY_CLCXX:
     return types::TY_CLHeader;
+  case types::TY_CUDA:
+  case types::TY_CUDA_DEVICE:
+    return types::TY_CUDA_Header;
+  case types::TY_HIP:
+  case types::TY_HIP_DEVICE:
+    return types::TY_HIP_Header;
   }
 }
diff --git a/clang/lib/Frontend/FrontendOptions.cpp 
b/clang/lib/Frontend/FrontendOptions.cpp
index 32ed99571e85d..62d6f64812b36 100644
--- a/clang/lib/Frontend/FrontendOptions.cpp
+++ b/clang/lib/Frontend/FrontendOptions.cpp
@@ -25,13 +25,13 @@ InputKind 
FrontendOptions::getInputKindForExtension(StringRef Extension) {
       .Cases("mm", "M", Language::ObjCXX)
       .Case("mii", InputKind(Language::ObjCXX).getPreprocessed())
       .Cases("C", "cc", "cp", Language::CXX)
-      .Cases("cpp", "CPP", "c++", "cxx", "hpp", "hxx", Language::CXX)
+      .Cases("cpp", "CPP", "c++", "cxx", "hpp", "hxx", "cuh", Language::CXX)
       .Case("cppm", Language::CXX)
       .Cases("iim", "iih", InputKind(Language::CXX).getPreprocessed())
       .Case("cl", Language::OpenCL)
       .Case("clcpp", Language::OpenCLCXX)
       .Cases("cu", "cuh", Language::CUDA)
-      .Case("hip", Language::HIP)
+      .Cases("hip", "hiph", Language::HIP)
       .Cases("ll", "bc", Language::LLVM_IR)
       .Case("hlsl", Language::HLSL)
       .Case("cir", Language::CIR)
diff --git a/clang/lib/InstallAPI/HeaderFile.cpp 
b/clang/lib/InstallAPI/HeaderFile.cpp
index 0b7041ec8147e..f117800b1ef79 100644
--- a/clang/lib/InstallAPI/HeaderFile.cpp
+++ b/clang/lib/InstallAPI/HeaderFile.cpp
@@ -38,7 +38,7 @@ std::optional<std::string> createIncludeHeaderName(const 
StringRef FullPath) {
 
 bool isHeaderFile(StringRef Path) {
   return StringSwitch<bool>(sys::path::extension(Path))
-      .Cases(".h", ".H", ".hh", ".hpp", ".hxx", true)
+      .Cases(".h", ".H", ".hh", ".hpp", ".hxx", ".cuh", ".hiph", true)
       .Default(false);
 }
 
diff --git a/clang/lib/Tooling/InterpolatingCompilationDatabase.cpp 
b/clang/lib/Tooling/InterpolatingCompilationDatabase.cpp
index 995019ca5a4d4..e42f55cef0b7d 100644
--- a/clang/lib/Tooling/InterpolatingCompilationDatabase.cpp
+++ b/clang/lib/Tooling/InterpolatingCompilationDatabase.cpp
@@ -115,9 +115,14 @@ static types::ID foldType(types::ID Lang) {
   case types::TY_ObjCXX:
   case types::TY_ObjCXXHeader:
     return types::TY_ObjCXX;
-  case types::TY_CUDA:
-  case types::TY_CUDA_DEVICE:
-    return types::TY_CUDA;
+    case types::TY_CUDA:
+    case types::TY_CUDA_DEVICE:
+    case types::TY_CUDA_Header:
+      return types::TY_CUDA;
+  case types::TY_HIP:
+  case types::TY_HIP_DEVICE:
+  case types::TY_HIP_Header:
+    return types::TY_HIP;
   default:
     return types::TY_INVALID;
   }

``````````

</details>


https://github.com/llvm/llvm-project/pull/148973
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