[llvm] [LLVM][AARCH64]Replace +sme2p1+smef16f16 by +smef16f16 (PR #88860)

[Momchil Velikov via llvm-commits]

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@@ -302,7 +302,7 @@ inline constexpr ExtensionInfo Extensions[] = {
     {"ssve-fp8dot4", AArch64::AEK_SSVE_FP8DOT4, "+ssve-fp8dot4", "-ssve-fp8dot4", FEAT_INIT, "+sme2", 0},
     {"lut", AArch64::AEK_LUT, "+lut", "-lut", FEAT_INIT, "", 0},
     {"sme-lutv2", AArch64::AEK_SME_LUTv2, "+sme-lutv2", "-sme-lutv2", FEAT_INIT, "", 0},
-    {"sme-f8f16", AArch64::AEK_SMEF8F16, "+sme-f8f16", "-sme-f8f16", FEAT_INIT, "+sme2,+fp8", 0},
+    {"sme-f8f16", AArch64::AEK_SMEF8F16, "+sme-f8f16", "-sme-f8f16", FEAT_INIT, "+sme2,+fp8,+sme-f16f16", 0},
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momchil-velikov wrote:

Right now, because of the missing dependency from `sme-f6f16` to `sme2` the compiler will happily generate instructions that are now allowed when using, e.g. `-march=armv8-a+sme-f16f16+nosme2`.

https://github.com/llvm/llvm-project/pull/88860