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-rw-r--r--src/compiler/nir/nir.h11
-rw-r--r--src/compiler/nir/nir_lower_io.c3
2 files changed, 14 insertions, 0 deletions
diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h
index 3e408e20f07..5897f6cea7c 100644
--- a/src/compiler/nir/nir.h
+++ b/src/compiler/nir/nir.h
@@ -3112,6 +3112,15 @@ typedef enum {
* component is a buffer index and the second is an offset.
*/
nir_address_format_32bit_index_offset,
+
+ /**
+ * An address format representing a purely logical addressing model. In
+ * this model, all deref chains must be complete from the dereference
+ * operation to the variable. Cast derefs are not allowed. These
+ * addresses will be 32-bit scalars but the format is immaterial because
+ * you can always chase the chain.
+ */
+ nir_address_format_logical,
} nir_address_format;
static inline unsigned
@@ -3122,6 +3131,7 @@ nir_address_format_bit_size(nir_address_format addr_format)
case nir_address_format_64bit_global: return 64;
case nir_address_format_64bit_bounded_global: return 32;
case nir_address_format_32bit_index_offset: return 32;
+ case nir_address_format_logical: return 32;
}
unreachable("Invalid address format");
}
@@ -3134,6 +3144,7 @@ nir_address_format_num_components(nir_address_format addr_format)
case nir_address_format_64bit_global: return 1;
case nir_address_format_64bit_bounded_global: return 4;
case nir_address_format_32bit_index_offset: return 2;
+ case nir_address_format_logical: return 1;
}
unreachable("Invalid address format");
}
diff --git a/src/compiler/nir/nir_lower_io.c b/src/compiler/nir/nir_lower_io.c
index d9642556258..1a7e00bf96a 100644
--- a/src/compiler/nir/nir_lower_io.c
+++ b/src/compiler/nir/nir_lower_io.c
@@ -618,6 +618,8 @@ build_addr_iadd(nir_builder *b, nir_ssa_def *addr,
assert(addr->num_components == 2);
return nir_vec2(b, nir_channel(b, addr, 0),
nir_iadd(b, nir_channel(b, addr, 1), offset));
+ case nir_address_format_logical:
+ unreachable("Unsupported address format");
}
unreachable("Invalid address format");
}
@@ -673,6 +675,7 @@ addr_to_global(nir_builder *b, nir_ssa_def *addr,
nir_u2u64(b, nir_channel(b, addr, 3)));
case nir_address_format_32bit_index_offset:
+ case nir_address_format_logical:
unreachable("Cannot get a 64-bit address with this address format");
}