Merge llvm-project main llvmorg-18-init-16595-g7c00a5be5cde

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvm-project main llvmorg-18-init-16595-g7c00a5be5cde.

PR:		276104
MFC after:	1 month

1 files changed, 5 insertions, 4 deletions

diff --git a/contrib/llvm-project/llvm/lib/Analysis/VFABIDemangling.cpp b/contrib/llvm-project/llvm/lib/Analysis/VFABIDemangling.cpp
index 426f98c0c628..8562d8fbfa1e 100644
--- a/contrib/llvm-project/llvm/lib/Analysis/VFABIDemangling.cpp
+++ b/contrib/llvm-project/llvm/lib/Analysis/VFABIDemangling.cpp
@@ -326,10 +326,6 @@ getScalableECFromSignature(const FunctionType *Signature, const VFISAKind ISA,
     // Only vector parameters are used when determining the VF; uniform or
     // linear are left as scalars, so do not affect VF.
     if (Param.ParamKind == VFParamKind::Vector) {
-      // If the scalar function doesn't actually have a corresponding argument,
-      // reject the mapping.
-      if (Param.ParamPos >= Signature->getNumParams())
-        return std::nullopt;
       Type *PTy = Signature->getParamType(Param.ParamPos);
 
       std::optional<ElementCount> EC = getElementCountForTy(ISA, PTy);
@@ -427,6 +423,11 @@ std::optional<VFInfo> VFABI::tryDemangleForVFABI(StringRef MangledName,
   if (Parameters.empty())
     return std::nullopt;
 
+  // If the number of arguments of the scalar function does not match the
+  // vector variant we have just demangled then reject the mapping.
+  if (Parameters.size() != FTy->getNumParams())
+    return std::nullopt;
+
   // Figure out the number of lanes in vectors for this function variant. This
   // is easy for fixed length, as the vlen encoding just gives us the value
   // directly. However, if the vlen mangling indicated that this function