[clang] [llvm] [AArch64] Fix feature flags dependecies (PR #90612)

[via cfe-commits]

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@@ -291,18 +290,17 @@ inline constexpr ExtensionInfo Extensions[] = {
     {"tme", AArch64::AEK_TME, "+tme", "-tme", FEAT_INIT, "", 0},
     {"wfxt", AArch64::AEK_NONE, {}, {}, FEAT_WFXT, "+wfxt", 550},
     {"gcs", AArch64::AEK_GCS, "+gcs", "-gcs", FEAT_INIT, "", 0},
-    {"fpmr", AArch64::AEK_FPMR, "+fpmr", "-fpmr", FEAT_INIT, "", 0},
-    {"fp8", AArch64::AEK_FP8, "+fp8", "-fp8", FEAT_INIT, "+fpmr", 0},
+    {"fp8", AArch64::AEK_FP8, "+fp8", "-fp8", FEAT_INIT, "+faminmax, +lut, +bf16", 0},
     {"faminmax", AArch64::AEK_FAMINMAX, "+faminmax", "-faminmax", FEAT_INIT, "", 0},
-    {"fp8fma", AArch64::AEK_FP8FMA, "+fp8fma", "-fp8fma", FEAT_INIT, "+fpmr", 0},
-    {"ssve-fp8fma", AArch64::AEK_SSVE_FP8FMA, "+ssve-fp8fma", "-ssve-fp8fma", FEAT_INIT, "+sme2", 0},
-    {"fp8dot2", AArch64::AEK_FP8DOT2, "+fp8dot2", "-fp8dot2", FEAT_INIT, "", 0},
-    {"ssve-fp8dot2", AArch64::AEK_SSVE_FP8DOT2, "+ssve-fp8dot2", "-ssve-fp8dot2", FEAT_INIT, "+sme2", 0},
-    {"fp8dot4", AArch64::AEK_FP8DOT4, "+fp8dot4", "-fp8dot4", FEAT_INIT, "", 0},
-    {"ssve-fp8dot4", AArch64::AEK_SSVE_FP8DOT4, "+ssve-fp8dot4", "-ssve-fp8dot4", FEAT_INIT, "+sme2", 0},
+    {"fp8fma", AArch64::AEK_FP8FMA, "+fp8fma", "-fp8fma", FEAT_INIT, "+fp8", 0},
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CarolineConcatto wrote:

Just in case, @tmatheson-arm left a comment in this patch:
https://github.com/llvm/llvm-project/pull/88860
About FEAT_INIT and function multi-version. 
If we have FEAT_INIT we should leave the list of dependencies empty, unless we want it to work with FMV
Maybe we should remove the dependencies from this file.
and only have 
`FEAT_INIT, ""`

https://github.com/llvm/llvm-project/pull/90612