[clang][LoongArch] Add OHOS target (#127555)

Add support for OHOS on loongarch64.

Author: Ami-zhang

clang/lib/Basic/Targets.cpp

@@ -749,8 +749,14 @@ std::unique_ptr<TargetInfo> AllocateTarget(const llvm::Triple &Triple,
   case llvm::Triple::loongarch64:
     switch (os) {
     case llvm::Triple::Linux:
-      return std::make_unique<LinuxTargetInfo<LoongArch64TargetInfo>>(Triple,
-                                                                      Opts);
+      switch (Triple.getEnvironment()) {
+      default:
+        return std::make_unique<LinuxTargetInfo<LoongArch64TargetInfo>>(Triple,
+                                                                        Opts);
+      case llvm::Triple::OpenHOS:
+        return std::make_unique<OHOSTargetInfo<LoongArch64TargetInfo>>(Triple,
+                                                                       Opts);
+      }
     case llvm::Triple::FreeBSD:
       return std::make_unique<FreeBSDTargetInfo<LoongArch64TargetInfo>>(Triple,
                                                                         Opts);

clang/lib/Driver/ToolChains/OHOS.cpp

@@ -111,6 +111,8 @@ std::string OHOS::getMultiarchTriple(const llvm::Triple &T) const {
     return "x86_64-linux-ohos";
   case llvm::Triple::aarch64:
     return "aarch64-linux-ohos";
+  case llvm::Triple::loongarch64:
+    return "loongarch64-linux-ohos";
   }
   return T.str();
 }
@@ -368,7 +370,9 @@ void OHOS::addExtraOpts(llvm::opt::ArgStringList &CmdArgs) const {
   CmdArgs.push_back("-z");
   CmdArgs.push_back("relro");
   CmdArgs.push_back("-z");
-  CmdArgs.push_back("max-page-size=4096");
+  CmdArgs.push_back(getArch() == llvm::Triple::loongarch64
+                        ? "max-page-size=16384"
+                        : "max-page-size=4096");
   // .gnu.hash section is not compatible with the MIPS target
   if (getArch() != llvm::Triple::mipsel)
     CmdArgs.push_back("--hash-style=both");

clang/test/Driver/Inputs/ohos_native_tree/llvm/lib/clang/x.y.z/lib/loongarch64-linux-ohos/.keep

@@ -6,6 +6,10 @@
 // RUN:     -resource-dir=%S/Inputs/ohos_native_tree/llvm/lib/clang/x.y.z \
 // RUN:     --sysroot=%S/Inputs/ohos_native_tree/sysroot -fuse-ld=ld -march=armv7-a -mcpu=cortex-a7 -mfloat-abi=soft 2>&1 \
 // RUN:     | FileCheck -check-prefixes=CHECK,CHECK-ARM-A7-SOFT %s
+// RUN: %clang %s -### -no-canonical-prefixes --target=loongarch64-linux-ohos \
+// RUN:     -resource-dir=%S/Inputs/ohos_native_tree/llvm/lib/clang/x.y.z \
+// RUN:     --sysroot=%S/Inputs/ohos_native_tree/sysroot 2>&1 \
+// RUN:     | FileCheck -check-prefixes=CHECK,CHECK-LOONGARCH %s
 // CHECK: {{.*}}clang{{.*}}" "-cc1"
 // CHECK-NOT: "-munwind-tables"
 // CHECK: "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
@@ -19,13 +23,17 @@
 // CHECK-NOT: "--build-id"
 // CHECK: "--hash-style=both"
 // CHECK: "-pie"
-// CHECK: "-dynamic-linker" "/lib/ld-musl-arm.so.1"
+// CHECK-ARM: "-dynamic-linker" "/lib/ld-musl-arm.so.1"
+// CHECK-ARM-A7-SOFT: "-dynamic-linker" "/lib/ld-musl-arm.so.1"
+// CHECK-LOONGARCH: "-dynamic-linker" "/lib/ld-musl-loongarch64.so.1"
 // CHECK: Scrt1.o
 // CHECK: crti.o
 // CHECK: clang_rt.crtbegin.o
 // CHECK-ARM: "-L[[SYSROOT]]{{/|\\\\}}usr{{/|\\\\}}lib{{/|\\\\}}arm-liteos-ohos{{/|\\\\}}"
+// CHECK-LOONGARCH: "-L[[SYSROOT]]{{/|\\\\}}usr{{/|\\\\}}lib{{/|\\\\}}loongarch64-linux-ohos{{/|\\\\}}"
 // CHECK-ARM-A7-SOFT: "-L[[SYSROOT]]{{/|\\\\}}usr{{/|\\\\}}lib{{/|\\\\}}arm-liteos-ohos{{/|\\\\}}a7_soft"
 // CHECK-ARM: "[[RESOURCE_DIR]]{{/|\\\\}}lib{{/|\\\\}}arm-liteos-ohos{{/|\\\\}}libclang_rt.builtins.a"
+// CHECK-LOONGARCH: "[[RESOURCE_DIR]]{{/|\\\\}}lib{{/|\\\\}}loongarch64-linux-ohos{{/|\\\\}}libclang_rt.builtins.a"
 // CHECK-ARM-A7-SOFT: "[[RESOURCE_DIR]]{{/|\\\\}}lib{{/|\\\\}}arm-liteos-ohos/a7_soft{{/|\\\\}}libclang_rt.builtins.a"
 // CHECK: "-lc"
 // CHECK: clang_rt.crtend.o
@@ -235,3 +243,14 @@
 
 // CHECK-OHOS-PTHREAD-NOT: -lpthread
 
+// RUN: %clang -### --target=aarch64-linux-ohos %s 2>&1 | \
+// RUN:   FileCheck --check-prefix=CHECK-MAXPAGESIZE-4KB %s
+// RUN: %clang -### --target=loongarch64-linux-ohos %s 2>&1 | \
+// RUN:   FileCheck --check-prefix=CHECK-MAXPAGESIZE-16KB %s
+// RUN: %clang -### --target=riscv64-linux-ohos %s 2>&1 | \
+// RUN:   FileCheck --check-prefix=CHECK-MAXPAGESIZE-4KB %s
+// RUN: %clang -### --target=x86_64-linux-ohos %s 2>&1 | \
+// RUN:   FileCheck --check-prefix=CHECK-MAXPAGESIZE-4KB %s
+
+// CHECK-MAXPAGESIZE-4KB: "-z" "max-page-size=4096"
+// CHECK-MAXPAGESIZE-16KB: "-z" "max-page-size=16384"

clang/test/Driver/Inputs/ohos_native_tree/llvm/lib/clang/x.y.z/lib/loongarch64-linux-ohos/clang_rt.crtbegin.o

@@ -3,13 +3,15 @@
 // RUN: %clang_cc1 -x c++ -E -dM -ffreestanding -triple=riscv64-linux-ohos < /dev/null | FileCheck %s -match-full-lines -check-prefix=RISCV64-OHOS-CXX
 // RUN: %clang_cc1 -x c++ -E -dM -ffreestanding -triple=mipsel-linux-ohos < /dev/null | FileCheck %s -match-full-lines -check-prefix=MIPSEL-OHOS-CXX
 // RUN: %clang_cc1 -x c++ -E -dM -ffreestanding -triple=x86_64-linux-ohos < /dev/null | FileCheck %s -match-full-lines -check-prefix=X86_64-OHOS-CXX
+// RUN: %clang_cc1 -x c++ -E -dM -ffreestanding -triple=loongarch64-linux-ohos < /dev/null | FileCheck %s -match-full-lines -check-prefix=LOONGARCH64-OHOS-CXX
 // RUN: %clang_cc1 -E -dM -ffreestanding -triple=arm-linux-ohos < /dev/null | FileCheck %s -check-prefix=OHOS-DEFS
 
 // ARM-OHOS-CXX: #define __STDCPP_DEFAULT_NEW_ALIGNMENT__ 8U
 // ARM64-OHOS-CXX: #define __STDCPP_DEFAULT_NEW_ALIGNMENT__ 16UL
 // RISCV64-OHOS-CXX: #define __STDCPP_DEFAULT_NEW_ALIGNMENT__ 16UL
 // MIPSEL-OHOS-CXX: #define __STDCPP_DEFAULT_NEW_ALIGNMENT__ 8U
 // X86_64-OHOS-CXX: #define __STDCPP_DEFAULT_NEW_ALIGNMENT__ 16UL
+// LOONGARCH64-OHOS-CXX: #define __STDCPP_DEFAULT_NEW_ALIGNMENT__ 16UL
 // OHOS-DEFS: __OHOS_FAMILY__
 // OHOS-DEFS: __OHOS__
 // OHOS-DEFS-NOT: __OHOS__