nir/intrinsics: Allow deref sources to consume anything

This commit adds a new num_components value for intrinsic sources of -1
which means that it consumes everything and the number of components
effectively isn't validated.  This is useful for deref sources which
just take the result of the deref and we leave it up to the driver to
decide what that size should be.

Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>

diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h
index 971d8c4..0042f80 100644 (file)
--- a/src/compiler/nir/nir.h
+++ b/src/compiler/nir/nir.h
@@ -1292,9 +1292,11 @@ typedef struct {
    /** number of components of each input register
     *
     * If this value is 0, the number of components is given by the
-    * num_components field of nir_intrinsic_instr.
+    * num_components field of nir_intrinsic_instr.  If this value is -1, the
+    * intrinsic consumes however many components are provided and it is not
+    * validated at all.
     */
-   unsigned src_components[NIR_INTRINSIC_MAX_INPUTS];
+   int src_components[NIR_INTRINSIC_MAX_INPUTS];
 
    bool has_dest;
 
@@ -1322,10 +1324,12 @@ nir_intrinsic_src_components(nir_intrinsic_instr *intr, unsigned srcn)
 {
    const nir_intrinsic_info *info = &nir_intrinsic_infos[intr->intrinsic];
    assert(srcn < info->num_srcs);
-   if (info->src_components[srcn])
+   if (info->src_components[srcn] > 0)
       return info->src_components[srcn];
-   else
+   else if (info->src_components[srcn] == 0)
       return intr->num_components;
+   else
+      return nir_src_num_components(intr->src[srcn]);
 }
 
 static inline unsigned

diff --git a/src/compiler/nir/nir_intrinsics.py b/src/compiler/nir/nir_intrinsics.py
index 6ea6ad1..24bcd6b 100644 (file)
--- a/src/compiler/nir/nir_intrinsics.py
+++ b/src/compiler/nir/nir_intrinsics.py
@@ -132,9 +132,9 @@ intrinsic("nop", flags=[CAN_ELIMINATE])
 
 intrinsic("load_param", dest_comp=0, indices=[PARAM_IDX], flags=[CAN_ELIMINATE])
 
-intrinsic("load_deref", dest_comp=0, src_comp=[1], flags=[CAN_ELIMINATE])
-intrinsic("store_deref", src_comp=[1, 0], indices=[WRMASK])
-intrinsic("copy_deref", src_comp=[1, 1])
+intrinsic("load_deref", dest_comp=0, src_comp=[-1], flags=[CAN_ELIMINATE])
+intrinsic("store_deref", src_comp=[-1, 0], indices=[WRMASK])
+intrinsic("copy_deref", src_comp=[-1, -1])
 
 # Interpolation of input.  The interp_deref_at* intrinsics are similar to the
 # load_var intrinsic acting on a shader input except that they interpolate the
@@ -269,15 +269,15 @@ intrinsic("set_vertex_count", src_comp=[1])
 # lowered, variants take a constant buffer index and register offset.
 
 def atomic(name, flags=[]):
-    intrinsic(name + "_deref", src_comp=[1], dest_comp=1, flags=flags)
+    intrinsic(name + "_deref", src_comp=[-1], dest_comp=1, flags=flags)
     intrinsic(name, src_comp=[1], dest_comp=1, indices=[BASE], flags=flags)
 
 def atomic2(name):
-    intrinsic(name + "_deref", src_comp=[1, 1], dest_comp=1)
+    intrinsic(name + "_deref", src_comp=[-1, 1], dest_comp=1)
     intrinsic(name, src_comp=[1, 1], dest_comp=1, indices=[BASE])
 
 def atomic3(name):
-    intrinsic(name + "_deref", src_comp=[1, 1, 1], dest_comp=1)
+    intrinsic(name + "_deref", src_comp=[-1, 1, 1], dest_comp=1)
     intrinsic(name, src_comp=[1, 1, 1], dest_comp=1, indices=[BASE])
 
 atomic("atomic_counter_inc")
@@ -374,20 +374,20 @@ intrinsic("vulkan_resource_reindex", src_comp=[1, 1], dest_comp=1,
 # 1: The data parameter to the atomic function (i.e. the value to add
 #    in shared_atomic_add, etc).
 # 2: For CompSwap only: the second data parameter.
-intrinsic("deref_atomic_add",  src_comp=[1, 1], dest_comp=1)
-intrinsic("deref_atomic_imin", src_comp=[1, 1], dest_comp=1)
-intrinsic("deref_atomic_umin", src_comp=[1, 1], dest_comp=1)
-intrinsic("deref_atomic_imax", src_comp=[1, 1], dest_comp=1)
-intrinsic("deref_atomic_umax", src_comp=[1, 1], dest_comp=1)
-intrinsic("deref_atomic_and",  src_comp=[1, 1], dest_comp=1)
-intrinsic("deref_atomic_or",   src_comp=[1, 1], dest_comp=1)
-intrinsic("deref_atomic_xor",  src_comp=[1, 1], dest_comp=1)
-intrinsic("deref_atomic_exchange", src_comp=[1, 1], dest_comp=1)
-intrinsic("deref_atomic_comp_swap", src_comp=[1, 1, 1], dest_comp=1)
-intrinsic("deref_atomic_fadd",  src_comp=[1, 1], dest_comp=1)
-intrinsic("deref_atomic_fmin",  src_comp=[1, 1], dest_comp=1)
-intrinsic("deref_atomic_fmax",  src_comp=[1, 1], dest_comp=1)
-intrinsic("deref_atomic_fcomp_swap", src_comp=[1, 1, 1], dest_comp=1)
+intrinsic("deref_atomic_add",  src_comp=[-1, 1], dest_comp=1)
+intrinsic("deref_atomic_imin", src_comp=[-1, 1], dest_comp=1)
+intrinsic("deref_atomic_umin", src_comp=[-1, 1], dest_comp=1)
+intrinsic("deref_atomic_imax", src_comp=[-1, 1], dest_comp=1)
+intrinsic("deref_atomic_umax", src_comp=[-1, 1], dest_comp=1)
+intrinsic("deref_atomic_and",  src_comp=[-1, 1], dest_comp=1)
+intrinsic("deref_atomic_or",   src_comp=[-1, 1], dest_comp=1)
+intrinsic("deref_atomic_xor",  src_comp=[-1, 1], dest_comp=1)
+intrinsic("deref_atomic_exchange", src_comp=[-1, 1], dest_comp=1)
+intrinsic("deref_atomic_comp_swap", src_comp=[-1, 1, 1], dest_comp=1)
+intrinsic("deref_atomic_fadd",  src_comp=[-1, 1], dest_comp=1)
+intrinsic("deref_atomic_fmin",  src_comp=[-1, 1], dest_comp=1)
+intrinsic("deref_atomic_fmax",  src_comp=[-1, 1], dest_comp=1)
+intrinsic("deref_atomic_fcomp_swap", src_comp=[-1, 1, 1], dest_comp=1)
 
 # SSBO atomic intrinsics
 #