[PATCH] D146054: [RISCV] Add --print-supported-extensions support

[Fangrui Song via Phabricator via cfe-commits]

MaskRay added a comment.

Sorry for the delay.



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Comment at: clang/include/clang/Frontend/FrontendOptions.h:286
 
+  /// print the supported extensions for the current target
+  unsigned PrintSupportedExtensions : 1;
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Comment at: clang/include/clang/Frontend/FrontendOptions.h:290
+  /// Output time trace profile.
+  unsigned TimeTrace : 1;
+
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stray change?


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Comment at: clang/test/Driver/print-supported-extensions.c:6
+// RUN: %clang --target=riscv64 --print-supported-extensions 2>&1 | \
+// RUN:   FileCheck --implicit-check-not=warning --strict-whitespace --match-full-lines %s
+
----------------



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Comment at: clang/test/Driver/print-supported-extensions.c:10
+// CHECK:All available -march extensions for RISC-V
+// CHECK:	Name                Version
+// CHECK-NEXT:	i                   2.1
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For `--strict-whitespace --match-full-lines` testing, we usually right align `CHECK` and `CHECK-NEXT`.


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Comment at: clang/tools/driver/cc1_main.cpp:187
+/// Print supported extensions of the RISCV target.
+static int print_supported_extensions() {
+  llvm::riscvExtensionsHelp();
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`printSupportedExtensions`. Why does this function return a dummy return value?

You can do `return printSupportedExtensions(), 0` below to save some lines.


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Comment at: llvm/lib/Support/RISCVISAInfo.cpp:202
+void llvm::riscvExtensionsHelp() {
+  errs() << "All available -march extensions for RISC-V\n\n";
+  errs() << '\t' << left_justify("Name", 20) << "Version\n";
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I think `outs()` is more conventional. Most `gcc --print-*` options go to stdout. `clang --print-supported-cpus` deviates and we should not copy its issue.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D146054/new/

https://reviews.llvm.org/D146054