fontconfig mesa git update 5 Mar 2015

10 files changed, 132 insertions, 40 deletions

diff --git a/mesalib/src/glsl/nir/glsl_to_nir.cpp b/mesalib/src/glsl/nir/glsl_to_nir.cpp
index 544d0d932..adef19c80 100644
--- a/mesalib/src/glsl/nir/glsl_to_nir.cpp
+++ b/mesalib/src/glsl/nir/glsl_to_nir.cpp
@@ -563,8 +563,14 @@ nir_visitor::visit(ir_discard *ir)
     * discards will be immediately followed by a return.
     */
 
-   nir_intrinsic_instr *discard =
-      nir_intrinsic_instr_create(this->shader, nir_intrinsic_discard);
+   nir_intrinsic_instr *discard;
+   if (ir->condition) {
+      discard = nir_intrinsic_instr_create(this->shader,
+                                           nir_intrinsic_discard_if);
+      discard->src[0] = evaluate_rvalue(ir->condition);
+   } else {
+      discard = nir_intrinsic_instr_create(this->shader, nir_intrinsic_discard);
+   }
    nir_instr_insert_after_cf_list(this->cf_node_list, &discard->instr);
 }
 
diff --git a/mesalib/src/glsl/nir/nir.c b/mesalib/src/glsl/nir/nir.c
index 5b0e4bc50..ab57fd4e2 100644
--- a/mesalib/src/glsl/nir/nir.c
+++ b/mesalib/src/glsl/nir/nir.c
@@ -63,6 +63,7 @@ reg_create(void *mem_ctx, struct exec_list *list)
 {
    nir_register *reg = ralloc(mem_ctx, nir_register);
 
+   reg->parent_instr = NULL;
    reg->uses = _mesa_set_create(mem_ctx, _mesa_hash_pointer,
                                 _mesa_key_pointer_equal);
    reg->defs = _mesa_set_create(mem_ctx, _mesa_hash_pointer,
diff --git a/mesalib/src/glsl/nir/nir.h b/mesalib/src/glsl/nir/nir.h
index d74caa959..d5df59609 100644
--- a/mesalib/src/glsl/nir/nir.h
+++ b/mesalib/src/glsl/nir/nir.h
@@ -66,6 +66,7 @@ name(const in_type *parent)                              \
 struct nir_function_overload;
 struct nir_function;
 struct nir_shader;
+struct nir_instr;
 
 
 /**
@@ -386,6 +387,14 @@ typedef struct {
     */
    bool is_packed;
 
+   /**
+    * If this pointer is non-NULL then this register has exactly one
+    * definition and that definition dominates all of its uses.  This is
+    * set by the out-of-SSA pass so that backends can get SSA-like
+    * information even once they have gone out of SSA.
+    */
+   struct nir_instr *parent_instr;
+
    /** set of nir_instr's where this register is used (read from) */
    struct set *uses;
 
@@ -408,7 +417,7 @@ typedef enum {
    nir_instr_type_parallel_copy,
 } nir_instr_type;
 
-typedef struct {
+typedef struct nir_instr {
    struct exec_node node;
    nir_instr_type type;
    struct nir_block *block;
diff --git a/mesalib/src/glsl/nir/nir_from_ssa.c b/mesalib/src/glsl/nir/nir_from_ssa.c
index 7c5009577..c3090fb06 100644
--- a/mesalib/src/glsl/nir/nir_from_ssa.c
+++ b/mesalib/src/glsl/nir/nir_from_ssa.c
@@ -26,6 +26,7 @@
  */
 
 #include "nir.h"
+#include "nir_vla.h"
 
 /*
  * This file implements an out-of-SSA pass as described in "Revisiting
@@ -181,7 +182,7 @@ merge_merge_sets(merge_set *a, merge_set *b)
 static bool
 merge_sets_interfere(merge_set *a, merge_set *b)
 {
-   merge_node *dom[a->size + b->size];
+   NIR_VLA(merge_node *, dom, a->size + b->size);
    int dom_idx = -1;
 
    struct exec_node *an = exec_list_get_head(&a->nodes);
@@ -508,6 +509,13 @@ get_register_for_ssa_def(nir_ssa_def *def, struct from_ssa_state *state)
       reg->num_components = def->num_components;
       reg->num_array_elems = 0;
 
+      /* This register comes from an SSA definition that was not part of a
+       * phi-web.  Therefore, we know it has a single unique definition
+       * that dominates all of its uses.  Therefore, we can copy the
+       * parent_instr from the SSA def safely.
+       */
+      reg->parent_instr = def->parent_instr;
+
       _mesa_hash_table_insert(state->ssa_table, def, reg);
       return reg;
    }
@@ -666,21 +674,16 @@ resolve_parallel_copy(nir_parallel_copy_instr *pcopy,
    }
 
    /* The register/source corresponding to the given index */
-   nir_src values[num_copies * 2];
-   memset(values, 0, sizeof values);
-
-   /* The current location of a given piece of data */
-   int loc[num_copies * 2];
+   NIR_VLA_ZERO(nir_src, values, num_copies * 2);
 
-   /* The piece of data that the given piece of data is to be copied from */
-   int pred[num_copies * 2];
+   /* The current location of a given piece of data.  We will use -1 for "null" */
+   NIR_VLA_FILL(int, loc, num_copies * 2, -1);
 
-   /* Initialize loc and pred.  We will use -1 for "null" */
-   memset(loc, -1, sizeof loc);
-   memset(pred, -1, sizeof pred);
+   /* The piece of data that the given piece of data is to be copied from.  We will use -1 for "null" */
+   NIR_VLA_FILL(int, pred, num_copies * 2, -1);
 
    /* The destinations we have yet to properly fill */
-   int to_do[num_copies * 2];
+   NIR_VLA(int, to_do, num_copies * 2);
    int to_do_idx = -1;
 
    /* Now we set everything up:
@@ -730,7 +733,7 @@ resolve_parallel_copy(nir_parallel_copy_instr *pcopy,
    }
 
    /* Currently empty destinations we can go ahead and fill */
-   int ready[num_copies * 2];
+   NIR_VLA(int, ready, num_copies * 2);
    int ready_idx = -1;
 
    /* Mark the ones that are ready for copying.  We know an index is a
diff --git a/mesalib/src/glsl/nir/nir_intrinsics.h b/mesalib/src/glsl/nir/nir_intrinsics.h
index d94866c85..3bf102fc1 100644
--- a/mesalib/src/glsl/nir/nir_intrinsics.h
+++ b/mesalib/src/glsl/nir/nir_intrinsics.h
@@ -68,6 +68,8 @@ INTRINSIC(interp_var_at_offset, 1, ARR(2), true, 0, 1, 0,
 #define BARRIER(name) INTRINSIC(name, 0, ARR(), false, 0, 0, 0, 0)
 
 BARRIER(discard)
+/** A conditional discard, with a single boolean source. */
+INTRINSIC(discard_if, 1, ARR(1), false, 0, 0, 0, 0)
 
 INTRINSIC(emit_vertex,   0, ARR(), false, 0, 0, 1, 0)
 INTRINSIC(end_primitive, 0, ARR(), false, 0, 0, 1, 0)
diff --git a/mesalib/src/glsl/nir/nir_live_variables.c b/mesalib/src/glsl/nir/nir_live_variables.c
index 7402dc087..1c96dcf36 100644
--- a/mesalib/src/glsl/nir/nir_live_variables.c
+++ b/mesalib/src/glsl/nir/nir_live_variables.c
@@ -26,6 +26,7 @@
 
 #include "nir.h"
 #include "nir_worklist.h"
+#include "nir_vla.h"
 
 /*
  * Basic liveness analysis.  This works only in SSA form.
@@ -130,8 +131,8 @@ static bool
 propagate_across_edge(nir_block *pred, nir_block *succ,
                       struct live_variables_state *state)
 {
-   BITSET_WORD live[state->bitset_words];
-   memcpy(live, succ->live_in, sizeof live);
+   NIR_VLA(BITSET_WORD, live, state->bitset_words);
+   memcpy(live, succ->live_in, state->bitset_words * sizeof *live);
 
    nir_foreach_instr(succ, instr) {
       if (instr->type != nir_instr_type_phi)
diff --git a/mesalib/src/glsl/nir/nir_lower_vars_to_ssa.c b/mesalib/src/glsl/nir/nir_lower_vars_to_ssa.c
index 8af753029..9e9a418e3 100644
--- a/mesalib/src/glsl/nir/nir_lower_vars_to_ssa.c
+++ b/mesalib/src/glsl/nir/nir_lower_vars_to_ssa.c
@@ -26,6 +26,8 @@
  */
 
 #include "nir.h"
+#include "nir_vla.h"
+
 
 struct deref_node {
    struct deref_node *parent;
@@ -899,8 +901,8 @@ rename_variables_block(nir_block *block, struct lower_variables_state *state)
 static void
 insert_phi_nodes(struct lower_variables_state *state)
 {
-   unsigned work[state->impl->num_blocks];
-   unsigned has_already[state->impl->num_blocks];
+   NIR_VLA_ZERO(unsigned, work, state->impl->num_blocks);
+   NIR_VLA_ZERO(unsigned, has_already, state->impl->num_blocks);
 
    /*
     * Since the work flags already prevent us from inserting a node that has
@@ -910,10 +912,7 @@ insert_phi_nodes(struct lower_variables_state *state)
     * function. So all we need to handle W is an array and a pointer to the
     * next element to be inserted and the next element to be removed.
     */
-   nir_block *W[state->impl->num_blocks];
-
-   memset(work, 0, sizeof work);
-   memset(has_already, 0, sizeof has_already);
+   NIR_VLA(nir_block *, W, state->impl->num_blocks);
 
    unsigned w_start, w_end;
    unsigned iter_count = 0;
diff --git a/mesalib/src/glsl/nir/nir_opt_copy_propagate.c b/mesalib/src/glsl/nir/nir_opt_copy_propagate.c
index dd0ec01ef..ee78e5aa0 100644
--- a/mesalib/src/glsl/nir/nir_opt_copy_propagate.c
+++ b/mesalib/src/glsl/nir/nir_opt_copy_propagate.c
@@ -53,22 +53,6 @@ static bool is_move(nir_alu_instr *instr)
 
 }
 
-static bool
-is_swizzleless_move(nir_alu_instr *instr)
-{
-   if (!is_move(instr))
-      return false;
-
-   for (unsigned i = 0; i < 4; i++) {
-      if (!((instr->dest.write_mask >> i) & 1))
-         break;
-      if (instr->src[0].swizzle[i] != i)
-         return false;
-   }
-
-   return true;
-}
-
 static bool is_vec(nir_alu_instr *instr)
 {
    for (unsigned i = 0; i < nir_op_infos[instr->op].num_inputs; i++)
@@ -80,6 +64,35 @@ static bool is_vec(nir_alu_instr *instr)
           instr->op == nir_op_vec4;
 }
 
+static bool
+is_swizzleless_move(nir_alu_instr *instr)
+{
+   if (is_move(instr)) {
+      for (unsigned i = 0; i < 4; i++) {
+         if (!((instr->dest.write_mask >> i) & 1))
+            break;
+         if (instr->src[0].swizzle[i] != i)
+            return false;
+      }
+      return true;
+   } else if (is_vec(instr)) {
+      nir_ssa_def *def = NULL;
+      for (unsigned i = 0; i < nir_op_infos[instr->op].num_inputs; i++) {
+         if (instr->src[i].swizzle[0] != i)
+            return false;
+
+         if (def == NULL) {
+            def = instr->src[i].src.ssa;
+         } else if (instr->src[i].src.ssa != def) {
+            return false;
+         }
+      }
+      return true;
+   } else {
+      return false;
+   }
+}
+
 typedef struct {
    nir_ssa_def *def;
    bool found;
diff --git a/mesalib/src/glsl/nir/nir_opt_gcm.c b/mesalib/src/glsl/nir/nir_opt_gcm.c
index bf565b969..b4f5fd3d5 100644
--- a/mesalib/src/glsl/nir/nir_opt_gcm.c
+++ b/mesalib/src/glsl/nir/nir_opt_gcm.c
@@ -121,9 +121,11 @@ gcm_pin_instructions_block(nir_block *block, void *void_state)
          case nir_op_fddy_coarse:
             /* These can only go in uniform control flow; pin them for now */
             instr->pass_flags = GCM_INSTR_PINNED;
+            break;
 
          default:
             instr->pass_flags = 0;
+            break;
          }
          break;
 
@@ -134,9 +136,11 @@ gcm_pin_instructions_block(nir_block *block, void *void_state)
          case nir_texop_lod:
             /* These two take implicit derivatives so they need to be pinned */
             instr->pass_flags = GCM_INSTR_PINNED;
+            break;
 
          default:
             instr->pass_flags = 0;
+            break;
          }
          break;
 
diff --git a/mesalib/src/glsl/nir/nir_vla.h b/mesalib/src/glsl/nir/nir_vla.h
new file mode 100644
index 000000000..753783316
--- /dev/null
+++ b/mesalib/src/glsl/nir/nir_vla.h
@@ -0,0 +1,54 @@
+/**************************************************************************
+ *
+ * Copyright 2015 VMware, Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+#pragma once
+
+
+#include "c99_alloca.h"
+
+
+/* Declare a variable length array, with no initialization */
+#define NIR_VLA(_type, _name, _length) \
+   _type *_name = alloca((_length) * sizeof *_name)
+
+
+/* Declare a variable length array, and initialize it with the given byte.
+ *
+ * _length is evaluated twice, so expressions with side-effects must be
+ * avoided.
+ */
+#define NIR_VLA_FILL(_type, _name, _length, _byte) \
+   _type *_name = memset(alloca((_length) * sizeof *_name), _byte, (_length) * sizeof *_name)
+
+
+/* Declare a variable length array, and zero it.
+ *
+ * Just like NIR_VLA_FILL, _length is evaluated twice, so expressions with
+ * side-effects must be avoided.
+ */
+#define NIR_VLA_ZERO(_type, _name, _length) \
+   NIR_VLA_FILL(_type, _name, _length, 0)