[clang] [compiler-rt] [llvm] [SystemZ] Add support for half (fp16) (PR #109164)

[Jonas Paulsson via llvm-commits]

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@@ -179,20 +179,31 @@ bool SystemZABIInfo::isVectorArgumentType(QualType Ty) const {
           getContext().getTypeSize(Ty) <= 128);
 }
 
-bool SystemZABIInfo::isFPArgumentType(QualType Ty) const {
+// The Size argument will in case of af an overaligned single element struct
+// reflect the overalignment value. In such a case the argument will be
+// passed using the type matching Size.
+llvm::Type *SystemZABIInfo::getFPArgumentType(QualType Ty,
+                                              uint64_t Size) const {
   if (IsSoftFloatABI)
-    return false;
+    return nullptr;
 
   if (const BuiltinType *BT = Ty->getAs<BuiltinType>())
     switch (BT->getKind()) {
+    case BuiltinType::Float16:
+      if (Size == 16)
----------------
JonPsson1 wrote:

As I wrote earlier, in cases of a single element struct containing e.g. a _Float16 aligned to 8 bytes, the argument will be passed as a Double. At this point, the Size reflects this situation. I guess that's why the code looked like it did before.


https://github.com/llvm/llvm-project/pull/109164