lower_lea: temporary hack

Author: Hugobros3

src/shady/passes/lower_lea.c

@@ -16,6 +16,17 @@ typedef struct {
     const CompilerConfig* config;
 } Context;
 
+// TODO: make this configuration-dependant
+static bool is_as_emulated(SHADY_UNUSED Context* ctx, AddressSpace as) {
+    switch (as) {
+        case AsPrivate:  return true; // TODO have a config option to do this with swizzled global memory
+        case AsSubgroup: return true;
+        case AsShared:   return true;
+        case AsGlobal:  return true; // TODO have a config option to do this with SSBOs
+        default: return false;
+    }
+}
+
 static const Node* lower_ptr_arithm(Context* ctx, BodyBuilder* bb, const Type* pointer_type, const Node* base, const Node* offset, size_t n_indices, const Node** indices) {
     IrArena* a = ctx->rewriter.dst_arena;
     const Type* emulated_ptr_t = int_type(a, (Int) { .width = a->config.memory.ptr_size, .is_signed = false });
@@ -110,7 +121,7 @@ static const Node* process(Context* ctx, const Node* old) {
                     bool must_lower = false;
                     // we have to lower generic pointers if we emulate them using ints
                     must_lower |= ctx->config->lower.emulate_generic_ptrs && old_base_ptr_t->payload.ptr_type.address_space == AsGeneric;
-                    must_lower |= ctx->config->lower.emulate_physical_memory && !old_base_ptr_t->payload.ptr_type.is_reference;
+                    must_lower |= ctx->config->lower.emulate_physical_memory && !old_base_ptr_t->payload.ptr_type.is_reference && is_as_emulated(ctx, old_base_ptr_t->payload.ptr_type.address_space);
                     if (!must_lower)
                         break;
                     BodyBuilder* bb = begin_body(a);