[clang] dedb632 - [HIP] Claim `--offload-compress` for `-M` (#133456)

[via cfe-commits]

Author: Yaxun (Sam) Liu
Date: 2025-04-02T18:28:56-04:00
New Revision: dedb632b833f14ef28c6f8a7f5e8983c1be60fa9

URL: https://github.com/llvm/llvm-project/commit/dedb632b833f14ef28c6f8a7f5e8983c1be60fa9
DIFF: https://github.com/llvm/llvm-project/commit/dedb632b833f14ef28c6f8a7f5e8983c1be60fa9.diff

LOG: [HIP] Claim `--offload-compress` for `-M` (#133456)

Cmake automatically generates dependency files with all compilation
options provided by users. When users use `--offload-compress` for HIP
compilation, it causes warnings when cmake generates dependency files.
Claim this option to suppress warnings.

Added: 
    

Modified: 
    clang/lib/Driver/ToolChains/Clang.cpp
    clang/test/Driver/hip-options.hip

Removed: 
    


################################################################################
diff  --git a/clang/lib/Driver/ToolChains/Clang.cpp b/clang/lib/Driver/ToolChains/Clang.cpp
index db4f50fc98f7c..70489adf01c94 100644
--- a/clang/lib/Driver/ToolChains/Clang.cpp
+++ b/clang/lib/Driver/ToolChains/Clang.cpp
@@ -1026,6 +1026,12 @@ void Clang::AddPreprocessingOptions(Compilation &C, const JobAction &JA,
       CmdArgs.push_back("-dependency-file");
       CmdArgs.push_back(DepFile);
     }
+    // Cmake generates dependency files using all compilation options specified
+    // by users. Claim those not used for dependency files.
+    if (JA.isOffloading(Action::OFK_HIP)) {
+      Args.ClaimAllArgs(options::OPT_offload_compress);
+      Args.ClaimAllArgs(options::OPT_no_offload_compress);
+    }
 
     bool HasTarget = false;
     for (const Arg *A : Args.filtered(options::OPT_MT, options::OPT_MQ)) {

diff  --git a/clang/test/Driver/hip-options.hip b/clang/test/Driver/hip-options.hip
index 0aabc8ad41904..29d23c1b6c8d9 100644
--- a/clang/test/Driver/hip-options.hip
+++ b/clang/test/Driver/hip-options.hip
@@ -242,3 +242,7 @@
 // NO-WARN-ATOMIC: clang{{.*}} "-triple" "amdgcn-amd-amdhsa" {{.*}} "-Werror=atomic-alignment" {{.*}} "-Wno-error=atomic-alignment"
 // NO-WARN-ATOMIC-NOT: clang{{.*}} "-triple" "x86_64-unknown-linux-gnu" {{.*}} "-Werror=atomic-alignment"
 // NO-WARN-ATOMIC-NOT: clang{{.*}} "-triple" "x86_64-unknown-linux-gnu" {{.*}} "-Wno-error=atomic-alignment"
+
+// Check --offload-compress does not cause warning.
+// RUN: %clang -### -Werror --target=x86_64-unknown-linux-gnu -nogpuinc -nogpulib \
+// RUN:   --offload-arch=gfx1100 --offload-compress --offload-host-only -M %s