[clang] [llvm] [WIP] Riscv libmvec support (PR #193721)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions c,h,cpp -- clang/lib/Driver/ToolChains/Clang.cpp clang/lib/Driver/ToolChains/Flang.cpp clang/test/Driver/fveclib.c llvm/include/llvm/IR/VFABIDemangler.h llvm/lib/Analysis/TargetLibraryInfo.cpp llvm/lib/IR/VFABIDemangler.cpp --diff_from_common_commit
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Analysis/TargetLibraryInfo.cpp b/llvm/lib/Analysis/TargetLibraryInfo.cpp
index 7993608a7..305cc96bf 100644
--- a/llvm/lib/Analysis/TargetLibraryInfo.cpp
+++ b/llvm/lib/Analysis/TargetLibraryInfo.cpp
@@ -1268,11 +1268,11 @@ static const VecDesc VecFuncs_LIBMVEC_AARCH64[] = {
 #include "llvm/Analysis/VecFuncs.def"
 #undef TLI_DEFINE_LIBMVEC_AARCH64_VECFUNCS
 
-static const VecDesc VecFuncs_LIBMVEC_RVV[] = {
+    static const VecDesc VecFuncs_LIBMVEC_RVV[] = {
 #define TLI_DEFINE_LIBMVEC_RVV_VECFUNCS
 #include "llvm/Analysis/VecFuncs.def"
 #undef TLI_DEFINE_LIBMVEC_RVV_VECFUNCS
-};
+    };
 
 static const VecDesc VecFuncs_MASSV[] = {
 #define TLI_DEFINE_MASSV_VECFUNCS

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https://github.com/llvm/llvm-project/pull/193721