[clang] [AArch64]: Refactor target parser to use BitVector. (PR #65423)

[Lucas Duarte Prates via cfe-commits]

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@@ -315,23 +317,23 @@ struct ArchInfo {
 };
 
 // clang-format off
-inline constexpr ArchInfo ARMV8A    = { VersionTuple{8, 0}, AProfile, "armv8-a", "+v8a", (AArch64::AEK_FP | AArch64::AEK_SIMD), };
-inline constexpr ArchInfo ARMV8_1A  = { VersionTuple{8, 1}, AProfile, "armv8.1-a", "+v8.1a", (ARMV8A.DefaultExts | AArch64::AEK_CRC | AArch64::AEK_LSE | AArch64::AEK_RDM)};
-inline constexpr ArchInfo ARMV8_2A  = { VersionTuple{8, 2}, AProfile, "armv8.2-a", "+v8.2a", (ARMV8_1A.DefaultExts | AArch64::AEK_RAS)};
-inline constexpr ArchInfo ARMV8_3A  = { VersionTuple{8, 3}, AProfile, "armv8.3-a", "+v8.3a", (ARMV8_2A.DefaultExts | AArch64::AEK_RCPC)};
-inline constexpr ArchInfo ARMV8_4A  = { VersionTuple{8, 4}, AProfile, "armv8.4-a", "+v8.4a", (ARMV8_3A.DefaultExts | AArch64::AEK_DOTPROD)};
-inline constexpr ArchInfo ARMV8_5A  = { VersionTuple{8, 5}, AProfile, "armv8.5-a", "+v8.5a", (ARMV8_4A.DefaultExts)};
-inline constexpr ArchInfo ARMV8_6A  = { VersionTuple{8, 6}, AProfile, "armv8.6-a", "+v8.6a", (ARMV8_5A.DefaultExts | AArch64::AEK_BF16 | AArch64::AEK_I8MM)};
-inline constexpr ArchInfo ARMV8_7A  = { VersionTuple{8, 7}, AProfile, "armv8.7-a", "+v8.7a", (ARMV8_6A.DefaultExts)};
-inline constexpr ArchInfo ARMV8_8A  = { VersionTuple{8, 8}, AProfile, "armv8.8-a", "+v8.8a", (ARMV8_7A.DefaultExts | AArch64::AEK_MOPS | AArch64::AEK_HBC)};
-inline constexpr ArchInfo ARMV8_9A  = { VersionTuple{8, 9}, AProfile, "armv8.9-a", "+v8.9a", (ARMV8_8A.DefaultExts | AArch64::AEK_SPECRES2 | AArch64::AEK_CSSC | AArch64::AEK_RASv2)};
-inline constexpr ArchInfo ARMV9A    = { VersionTuple{9, 0}, AProfile, "armv9-a", "+v9a", (ARMV8_5A.DefaultExts | AArch64::AEK_FP16 | AArch64::AEK_SVE | AArch64::AEK_SVE2)};
-inline constexpr ArchInfo ARMV9_1A  = { VersionTuple{9, 1}, AProfile, "armv9.1-a", "+v9.1a", (ARMV9A.DefaultExts | AArch64::AEK_BF16 | AArch64::AEK_I8MM)};
-inline constexpr ArchInfo ARMV9_2A  = { VersionTuple{9, 2}, AProfile, "armv9.2-a", "+v9.2a", (ARMV9_1A.DefaultExts)};
-inline constexpr ArchInfo ARMV9_3A  = { VersionTuple{9, 3}, AProfile, "armv9.3-a", "+v9.3a", (ARMV9_2A.DefaultExts | AArch64::AEK_MOPS | AArch64::AEK_HBC)};
-inline constexpr ArchInfo ARMV9_4A  = { VersionTuple{9, 4}, AProfile, "armv9.4-a", "+v9.4a", (ARMV9_3A.DefaultExts | AArch64::AEK_SPECRES2 | AArch64::AEK_CSSC | AArch64::AEK_RASv2)};
+inline ArchInfo ARMV8A    = { VersionTuple{8, 0}, AProfile, "armv8-a", "+v8a", (BitVector(AEK_EXTENTIONS_NUM).set(AArch64::AEK_FP).set(AArch64::AEK_SIMD)), };
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pratlucas wrote:

Could we have a constructor for `ArchInfo` that takes a list of `ArchExtKind`s as an argument (e.g. an initialiser_list)? This would make these lines less verbose and a bit more readable.

https://github.com/llvm/llvm-project/pull/65423