freedreno/ir3: Add intrinsics that map to LDLW/STLW

These intrinsics will let us do all the offset calculations in nir,
which is nicer to work with and lets nir_opt_algebraic eat it all up.

Signed-off-by: Kristian H. Kristensen <hoegsberg@google.com>

src/compiler/nir/nir_intrinsics.py

@@ -771,6 +771,14 @@ intrinsic("ssbo_atomic_xor_ir3",        src_comp=[1, 1, 1, 1],    dest_comp=1)
 intrinsic("ssbo_atomic_exchange_ir3",   src_comp=[1, 1, 1, 1],    dest_comp=1)
 intrinsic("ssbo_atomic_comp_swap_ir3",  src_comp=[1, 1, 1, 1, 1], dest_comp=1)
 
+# IR3-specific load/store intrinsics. These access a buffer used to pass data
+# between geometry stages - perhaps it's explicit access to the vertex cache.
+
+# src[] = { value, offset }.
+store("shared_ir3", 2, [BASE, WRMASK, ALIGN_MUL, ALIGN_OFFSET])
+# src[] = { offset }.
+load("shared_ir3", 1, [BASE, ALIGN_MUL, ALIGN_OFFSET], [CAN_ELIMINATE])
+
 # Intrinsics used by the Midgard/Bifrost blend pipeline. These are defined
 # within a blend shader to read/write the raw value from the tile buffer,
 # without applying any format conversion in the process. If the shader needs