clang: Avoid hardcoding some offload triple strings (#193811)

arsenm · web-flow · commit 3cd4a795d9fd · 2026-04-23T22:02:19.000+01:00
This will make it easier to use the subarch field in the future.
diff --git a/clang/lib/Basic/OffloadArch.cpp b/clang/lib/Basic/OffloadArch.cpp
@@ -152,15 +152,20 @@ OffloadArch StringToOffloadArch(llvm::StringRef S) {
 llvm::Triple OffloadArchToTriple(const llvm::Triple &DefaultToolchainTriple,
                                  OffloadArch ID) {
   if (ID == OffloadArch::AMDGCNSPIRV)
-    return llvm::Triple("spirv64-amd-amdhsa");
+    return llvm::Triple(llvm::Triple::spirv64, llvm::Triple::NoSubArch,
+                        llvm::Triple::AMD, llvm::Triple::AMDHSA);
 
-  if (IsNVIDIAOffloadArch(ID))
-    return DefaultToolchainTriple.isArch64Bit()
-               ? llvm::Triple("nvptx64-nvidia-cuda")
-               : llvm::Triple("nvptx-nvidia-cuda");
+  if (IsNVIDIAOffloadArch(ID)) {
+    llvm::Triple::ArchType Arch = DefaultToolchainTriple.isArch64Bit()
+                                      ? llvm::Triple::nvptx64
+                                      : llvm::Triple::nvptx;
+    return llvm::Triple(Arch, llvm::Triple::NoSubArch, llvm::Triple::NVIDIA,
+                        llvm::Triple::CUDA);
+  }
 
   if (IsAMDOffloadArch(ID))
-    return llvm::Triple("amdgcn-amd-amdhsa");
+    return llvm::Triple(llvm::Triple::amdgcn, llvm::Triple::NoSubArch,
+                        llvm::Triple::AMD, llvm::Triple::AMDHSA);
 
   return {};
 }
diff --git a/clang/lib/Basic/Targets/SPIR.cpp b/clang/lib/Basic/Targets/SPIR.cpp
@@ -108,7 +108,10 @@ void SPIRV64TargetInfo::getTargetDefines(const LangOptions &Opts,
   DefineStd(Builder, "SPIRV64", Opts);
 }
 
-static const AMDGPUTargetInfo AMDGPUTI(llvm::Triple("amdgcn-amd-amdhsa"), {});
+static const AMDGPUTargetInfo
+    AMDGPUTI(llvm::Triple(llvm::Triple::amdgcn, llvm::Triple::NoSubArch,
+                          llvm::Triple::AMD, llvm::Triple::AMDHSA),
+             {});
 
 ArrayRef<const char *> SPIRV64AMDGCNTargetInfo::getGCCRegNames() const {
   return AMDGPUTI.getGCCRegNames();
diff --git a/clang/lib/Driver/Driver.cpp b/clang/lib/Driver/Driver.cpp
@@ -973,8 +973,10 @@ static TripleSet inferOffloadToolchains(Compilation &C,
   for (llvm::StringRef Arch : Archs) {
     OffloadArch ID = StringToOffloadArch(Arch);
     if (ID == OffloadArch::Unknown)
-      ID = StringToOffloadArch(
-          getProcessorFromTargetID(llvm::Triple("amdgcn-amd-amdhsa"), Arch));
+      ID = StringToOffloadArch(getProcessorFromTargetID(
+          llvm::Triple(llvm::Triple::amdgcn, llvm::Triple::NoSubArch,
+                       llvm::Triple::AMD, llvm::Triple::AMDHSA),
+          Arch));
 
     if (Kind == Action::OFK_HIP && !IsAMDOffloadArch(ID)) {
       C.getDriver().Diag(clang::diag::err_drv_offload_bad_gpu_arch)
@@ -1020,17 +1022,20 @@ static TripleSet inferOffloadToolchains(Compilation &C,
 
   // Infer the default target triple if no specific architectures are given.
   if (Archs.empty() && Kind == Action::OFK_HIP)
-    Triples.insert(llvm::Triple("amdgcn-amd-amdhsa"));
-  else if (Archs.empty() && Kind == Action::OFK_Cuda)
+    Triples.insert(llvm::Triple(llvm::Triple::amdgcn, llvm::Triple::NoSubArch,
+                                llvm::Triple::AMD, llvm::Triple::AMDHSA));
+  else if (Archs.empty() && Kind == Action::OFK_Cuda) {
+    llvm::Triple::ArchType Arch =
+        C.getDefaultToolChain().getTriple().isArch64Bit()
+            ? llvm::Triple::nvptx64
+            : llvm::Triple::nvptx;
+    Triples.insert(llvm::Triple(Arch, llvm::Triple::NoSubArch,
+                                llvm::Triple::NVIDIA, llvm::Triple::CUDA));
+  } else if (Archs.empty() && Kind == Action::OFK_SYCL)
     Triples.insert(
         llvm::Triple(C.getDefaultToolChain().getTriple().isArch64Bit()
-                         ? "nvptx64-nvidia-cuda"
-                         : "nvptx-nvidia-cuda"));
-  else if (Archs.empty() && Kind == Action::OFK_SYCL)
-    Triples.insert(
-        llvm::Triple(C.getDefaultToolChain().getTriple().isArch64Bit()
-                         ? "spirv64-unknown-unknown"
-                         : "spirv32-unknown-unknown"));
+                         ? llvm::Triple::spirv64
+                         : llvm::Triple::spirv32));
 
   // We need to dispatch these to the appropriate toolchain now.
   C.getArgs().eraseArg(options::OPT_offload_arch_EQ);
diff --git a/clang/lib/Sema/SemaAMDGPU.cpp b/clang/lib/Sema/SemaAMDGPU.cpp
@@ -1024,7 +1024,9 @@ bool DiagnoseUnguardedBuiltins::VisitCallExpr(CallExpr *CE) {
       for (auto &&F : llvm::split(BInfo.getRequiredFeatures(GID), ','))
         FeatureMap[F] = true;
   } else {
-    static const llvm::Triple AMDGCN("amdgcn-amd-amdhsa");
+    static const llvm::Triple AMDGCN(llvm::Triple::amdgcn,
+                                     llvm::Triple::NoSubArch, llvm::Triple::AMD,
+                                     llvm::Triple::AMDHSA);
     llvm::AMDGPU::fillAMDGPUFeatureMap(CurrentGFXIP.back().second, AMDGCN,
                                        FeatureMap);
   }
