[LinkerWrapper] Accept compression arguments for HIP fatbins (#84337)

Summary:
The HIP toolchain has support for compressing the final output. We
should respect that when we create the executable.

Author: jhuber6

clang/lib/Driver/ToolChains/Clang.cpp

@@ -8895,6 +8895,10 @@ void LinkerWrapper::ConstructJob(Compilation &C, const JobAction &JA,
   for (const char *LinkArg : LinkCommand->getArguments())
     CmdArgs.push_back(LinkArg);
 
+  if (Args.hasFlag(options::OPT_offload_compress,
+                   options::OPT_no_offload_compress, false))
+    CmdArgs.push_back("--compress");
+
   const char *Exec =
       Args.MakeArgString(getToolChain().GetProgramPath("clang-linker-wrapper"));
 

clang/test/Driver/linker-wrapper.c

@@ -114,12 +114,12 @@ __attribute__((visibility("protected"), used)) int x;
 // RUN:   --image=file=%t.elf.o,kind=hip,triple=amdgcn-amd-amdhsa,arch=gfx908
 // RUN: %clang -cc1 %s -triple x86_64-unknown-linux-gnu -emit-obj -o %t.o \
 // RUN:   -fembed-offload-object=%t.out
-// RUN: clang-linker-wrapper --dry-run --host-triple=x86_64-unknown-linux-gnu \
+// RUN: clang-linker-wrapper --dry-run --host-triple=x86_64-unknown-linux-gnu --compress \
 // RUN:   --linker-path=/usr/bin/ld %t.o -o a.out 2>&1 | FileCheck %s --check-prefix=HIP
 
 // HIP: clang{{.*}} -o [[IMG_GFX908:.+]] --target=amdgcn-amd-amdhsa -mcpu=gfx908
 // HIP: clang{{.*}} -o [[IMG_GFX90A:.+]] --target=amdgcn-amd-amdhsa -mcpu=gfx90a
-// HIP: clang-offload-bundler{{.*}}-type=o -bundle-align=4096 -targets=host-x86_64-unknown-linux,hipv4-amdgcn-amd-amdhsa--gfx90a,hipv4-amdgcn-amd-amdhsa--gfx908 -input=/dev/null -input=[[IMG_GFX90A]] -input=[[IMG_GFX908]] -output={{.*}}.hipfb
+// HIP: clang-offload-bundler{{.*}}-type=o -bundle-align=4096 -compress -targets=host-x86_64-unknown-linux,hipv4-amdgcn-amd-amdhsa--gfx90a,hipv4-amdgcn-amd-amdhsa--gfx908 -input=/dev/null -input=[[IMG_GFX90A]] -input=[[IMG_GFX908]] -output={{.*}}.hipfb
 
 // RUN: clang-offload-packager -o %t.out \
 // RUN:   --image=file=%t.elf.o,kind=openmp,triple=amdgcn-amd-amdhsa,arch=gfx908 \

clang/tools/clang-linker-wrapper/ClangLinkerWrapper.cpp

@@ -405,6 +405,9 @@ fatbinary(ArrayRef<std::pair<StringRef, StringRef>> InputFiles,
   CmdArgs.push_back("-type=o");
   CmdArgs.push_back("-bundle-align=4096");
 
+  if (Args.hasArg(OPT_compress))
+    CmdArgs.push_back("-compress");
+
   SmallVector<StringRef> Targets = {"-targets=host-x86_64-unknown-linux"};
   for (const auto &[File, Arch] : InputFiles)
     Targets.push_back(Saver.save("hipv4-amdgcn-amd-amdhsa--" + Arch));

clang/tools/clang-linker-wrapper/LinkerWrapperOpts.td

@@ -58,6 +58,8 @@ def print_wrapped_module : Flag<["--"], "print-wrapped-module">,
   HelpText<"Print the wrapped module's IR for testing">;
 def save_temps : Flag<["--"], "save-temps">,
   Flags<[WrapperOnlyOption]>, HelpText<"Save intermediate results">;
+def compress : Flag<["--"], "compress">,
+  Flags<[WrapperOnlyOption]>, HelpText<"Compress bundled files">;
 
 def wrapper_time_trace_eq : Joined<["--"], "wrapper-time-trace=">,
   Flags<[WrapperOnlyOption]>, MetaVarName<"<file>">,