[clang] [FMV][AArch64] Do not emit ifunc resolver on use. (PR #97761)

[Tomas Matheson via cfe-commits]

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@@ -11,7 +11,7 @@ int __attribute__((target_version("fp+aes"))) fmv(void) { return 6; }
 int __attribute__((target_version("crc+ls64_v"))) fmv(void) { return 7; }
 int __attribute__((target_version("bti"))) fmv(void) { return 8; }
 int __attribute__((target_version("sme2"))) fmv(void) { return 9; }
-int __attribute__((target_version("default"))) fmv(void);
+int __attribute__((target_version("default"))) fmv(void) { return 0; }
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tmatheson-arm wrote:

I think `fmv_one` and `fmv_too` should be defined too, to keep the original behaviour of this test unchanged, and then add a new, separate test for checking the various behaviours of `default`

https://github.com/llvm/llvm-project/pull/97761