[clang] [flang] [Flang][LoongArch] Enable clang command-line options in flang. (PR #118244)

[via cfe-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-clang

@llvm/pr-subscribers-clang-driver

Author: Zhaoxin Yang (ylzsx)

<details>
<summary>Changes</summary>

Mainly including the following LoongArch specific options: -m[no-]lsx, -m[no-]lasx, -msimd=, -m[no-]frecipe, -m[no-]lam-bh, -m[no-]lamcas, -m[no-]ld-seq-sa, -m[no-]div32,
-m[no-]annotate-tablejump

---
Full diff: https://github.com/llvm/llvm-project/pull/118244.diff


3 Files Affected:

- (modified) clang/include/clang/Driver/Options.td (+2-1) 
- (modified) clang/lib/Driver/ToolChains/Flang.cpp (+8) 
- (added) flang/test/Driver/options-loongarch.f90 (+43) 


``````````diff
diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
index 9c356c9d2ea4ef..7b8e2660192580 100644
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -240,7 +240,8 @@ def m_riscv_Features_Group : OptionGroup<"<riscv features group>">,
 def m_ve_Features_Group : OptionGroup<"<ve features group>">,
                           Group<m_Group>, DocName<"VE">;
 def m_loongarch_Features_Group : OptionGroup<"<loongarch features group>">,
-                                 Group<m_Group>, DocName<"LoongArch">;
+                                 Group<m_Group>, DocName<"LoongArch">,
+                                 Visibility<[ClangOption, CLOption, FlangOption]>;
 
 def m_libc_Group : OptionGroup<"<m libc group>">, Group<m_mips_Features_Group>,
                    Flags<[HelpHidden]>;
diff --git a/clang/lib/Driver/ToolChains/Flang.cpp b/clang/lib/Driver/ToolChains/Flang.cpp
index 8c18c88fbde7f7..02323b90b65473 100644
--- a/clang/lib/Driver/ToolChains/Flang.cpp
+++ b/clang/lib/Driver/ToolChains/Flang.cpp
@@ -213,6 +213,14 @@ void Flang::AddLoongArch64TargetArgs(const ArgList &Args,
       D.Diag(diag::err_drv_argument_not_allowed_with) << "-mabi" << V;
     }
   }
+
+  if (const Arg *A = Args.getLastArg(options::OPT_mannotate_tablejump,
+                                     options::OPT_mno_annotate_tablejump)) {
+    if (A->getOption().matches(options::OPT_mannotate_tablejump)) {
+      CmdArgs.push_back("-mllvm");
+      CmdArgs.push_back("-loongarch-annotate-tablejump");
+    }
+  }
 }
 
 void Flang::AddPPCTargetArgs(const ArgList &Args,
diff --git a/flang/test/Driver/options-loongarch.f90 b/flang/test/Driver/options-loongarch.f90
new file mode 100644
index 00000000000000..717bf6385b06d7
--- /dev/null
+++ b/flang/test/Driver/options-loongarch.f90
@@ -0,0 +1,43 @@
+!! This test tests options from clang, which are also supported by flang in LoongArch.
+
+! RUN: %flang -c --target=loongarch64-unknown-linux -mlsx %s -### 2>&1 | FileCheck --check-prefixes=LSX,NOLASX %s
+! RUN: %flang -c --target=loongarch64-unknown-linux -mno-lsx %s -### 2>&1 | FileCheck --check-prefixes=NOLSX,NOLASX %s
+! RUN: %flang -c --target=loongarch64-unknown-linux -mlasx %s -### 2>&1 | FileCheck --check-prefixes=LSX,LASX %s
+! RUN: %flang -c --target=loongarch64-unknown-linux -mno-lasx %s -### 2>&1 | FileCheck --check-prefixes=LSX,NOLASX %s
+! RUN: %flang -c --target=loongarch64-unknown-linux -msimd=none %s -### 2>&1 | FileCheck --check-prefixes=NOLSX,NOLASX %s
+! RUN: %flang -c --target=loongarch64-unknown-linux -msimd=lsx %s -### 2>&1 | FileCheck --check-prefixes=LSX,NOLASX %s
+! RUN: %flang -c --target=loongarch64-unknown-linux -msimd=lasx %s -### 2>&1 | FileCheck --check-prefixes=LSX,LASX %s
+! RUN: not %flang -c --target=loongarch64-unknown-linux -msimd=supper %s -### 2>&1 | FileCheck --check-prefix=MSIMD-INVALID %s
+! RUN: %flang -c --target=loongarch64-unknown-linux -mfrecipe %s -### 2>&1 | FileCheck --check-prefix=FRECIPE %s
+! RUN: %flang -c --target=loongarch64-unknown-linux -mno-frecipe %s -### 2>&1 | FileCheck --check-prefix=NOFRECIPE %s
+! RUN: %flang -c --target=loongarch64-unknown-linux -mlam-bh %s -### 2>&1 | FileCheck --check-prefix=LAMBH %s
+! RUN: %flang -c --target=loongarch64-unknown-linux -mno-lam-bh %s -### 2>&1 | FileCheck --check-prefix=NOLAMBH %s
+! RUN: %flang -c --target=loongarch64-unknown-linux -mlamcas %s -### 2>&1 | FileCheck --check-prefix=LAMCAS %s
+! RUN: %flang -c --target=loongarch64-unknown-linux -mno-lamcas %s -### 2>&1 | FileCheck --check-prefix=NOLAMCAS %s
+! RUN: %flang -c --target=loongarch64-unknown-linux -mld-seq-sa %s -### 2>&1 | FileCheck --check-prefix=LD-SEQ-SA %s
+! RUN: %flang -c --target=loongarch64-unknown-linux -mno-ld-seq-sa %s -### 2>&1 | FileCheck --check-prefix=NOLD-SEQ-SA %s
+! RUN: %flang -c --target=loongarch64-unknown-linux -mdiv32 %s -### 2>&1 | FileCheck --check-prefix=DIV32 %s
+! RUN: %flang -c --target=loongarch64-unknown-linux -mno-div32 %s -### 2>&1 | FileCheck --check-prefix=NODIV32 %s
+! RUN: %flang -c --target=loongarch64-unknown-linux -mannotate-tablejump %s -### 2>&1 | FileCheck --check-prefix=ANOTATE %s
+! RUN: %flang -c --target=loongarch64-unknown-linux -mno-annotate-tablejump %s -### 2>&1 | FileCheck --check-prefix=NOANOTATE %s
+
+! MSIMD-INVALID: error: invalid argument 'supper' to -msimd=; must be one of: none, lsx, lasx
+! FRECIPE: "-target-feature" "+frecipe"
+! NOFRECIPE-NOT: "-target-feature" "+frecipe"
+! LAMBH: "-target-feature" "+lam-bh"
+! NOLAMBH-NOT: "-target-feature" "+lam-bh"
+! LAMCAS: "-target-feature" "+lamcas"
+! NOLAMCAS-NOT: "-target-feature" "+lamcas"
+! LD-SEQ-SA: "-target-feature" "+ld-seq-sa"
+! NOLD-SEQ-SA-NOT: "-target-feature" "+ld-seq-sa"
+! DIV32: "-target-feature" "+div32"
+! NODIV32-NOT: "-target-feature" "+div32"
+! ANOTATE: "-mllvm" "-loongarch-annotate-tablejump"
+! NOANOTATE-NOT: "-loongarch-annotate-tablejump"
+
+! NOLSX-NOT: "-target-feature" "+lsx"
+! NOLASX-NOT: "-target-feature" "+lasx"
+! LSX-DAG: "-target-feature" "+lsx"
+! LASX-DAG: "-target-feature" "+lasx"
+! NOLSX-NOT: "-target-feature" "+lsx"
+! NOLASX-NOT: "-target-feature" "+lasx"

``````````

</details>


https://github.com/llvm/llvm-project/pull/118244