[Clang][ByteCode] Add numeric-only `TYPE_SWITCH` to avoid Pointer/MemberPointer instantiation in vector handlers

[AdityaC4]

In InterpBuiltin.cpp, TYPE_SWITCH expands over all PrimTypes (incl. PT_Ptr/PT_MemberPtr). For vector extract/insert we need a numeric-only dispatch (ints + float). Pointer types don’t have toAPSInt() and cause compile errors.

Repro (sketch):

PrimType PT = Vec.getFieldDesc()->getPrimType();
TYPE_SWITCH(PT, {
  // Integer path needs toAPSInt(); float path pushes Floating.
  // Pointer/MemberPointer cases get instantiated and don’t compile.
});

Error:

error: no member named 'toAPSInt' in 'clang::interp::Pointer'
error: no member named 'toAPSInt' in 'clang::interp::MemberPointer'

Expected: A macro that dispatches over ints + float only, excluding Bool/Ptr/MemberPtr/FixedPoint.

Context: Found while adding constexpr for X86 vec_ext/vec_set. PR: #161302
Current workaround: if (PT == PT_Float) { … } else { INT_TYPE_SWITCH_NO_BOOL(PT, …) }

[llvmbot]

Hi!

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[llvmbot]

@llvm/issue-subscribers-good-first-issue

Author: Aditya Chaudhari (AdityaC4)

In `InterpBuiltin.cpp`, `TYPE_SWITCH` expands over all `PrimType`s (incl. `PT_Ptr`/`PT_MemberPtr`). For vector extract/insert we need a **numeric-only** dispatch (ints + float). Pointer types don’t have `toAPSInt()` and cause compile errors.

Repro (sketch):

PrimType PT = Vec.getFieldDesc()->getPrimType();
TYPE_SWITCH(PT, {
  // Integer path needs toAPSInt(); float path pushes Floating.
  // Pointer/MemberPointer cases get instantiated and don’t compile.
});

Error:

error: no member named 'toAPSInt' in 'clang::interp::Pointer'
error: no member named 'toAPSInt' in 'clang::interp::MemberPointer'

Expected: A macro that dispatches over ints + float only, excluding Bool/Ptr/MemberPtr/FixedPoint.

Context: Found while adding constexpr for X86 vec_ext/vec_set. PR: #161302
Current workaround: if (PT == PT_Float) { … } else { INT_TYPE_SWITCH_NO_BOOL(PT, …) }