libxtrans fontconfig mesa xserver pixman xkbcomp git update 4 nov 2013

xserver          commit 33c85beed521c9db140cadd8c5aa9992398ee1fe
xkbcomp          commit e3e6e938535532bfad175c1635256ab7fb3ac943
pixman           commit 8cbc7da4e525c96a8e089e4c1baee75dc8315218
libxtrans        commit 1fb0fd555a16dd8fce4abc6d3fd22b315f46762a
fontconfig       commit 767108aa1327cf0156dfc6f024dbc8fb783ae067
mesa             commit 2f896627175384fd5943f21804700a155ba4e8a0

38 files changed, 863 insertions, 36 deletions

diff --git a/mesalib/src/glsl/Makefile.sources b/mesalib/src/glsl/Makefile.sources
index 2f7bfa163..2aabc0585 100644
--- a/mesalib/src/glsl/Makefile.sources
+++ b/mesalib/src/glsl/Makefile.sources
@@ -83,6 +83,7 @@ LIBGLSL_FILES = \
 	$(GLSL_SRCDIR)/opt_constant_variable.cpp \
 	$(GLSL_SRCDIR)/opt_copy_propagation.cpp \
 	$(GLSL_SRCDIR)/opt_copy_propagation_elements.cpp \
+	$(GLSL_SRCDIR)/opt_cse.cpp \
 	$(GLSL_SRCDIR)/opt_dead_builtin_varyings.cpp \
 	$(GLSL_SRCDIR)/opt_dead_code.cpp \
 	$(GLSL_SRCDIR)/opt_dead_code_local.cpp \
diff --git a/mesalib/src/glsl/builtin_variables.cpp b/mesalib/src/glsl/builtin_variables.cpp
index 7a3505ace..4d441045a 100644
--- a/mesalib/src/glsl/builtin_variables.cpp
+++ b/mesalib/src/glsl/builtin_variables.cpp
@@ -30,6 +30,9 @@
 #include "program/prog_statevars.h"
 #include "program/prog_instruction.h"
 
+static struct gl_builtin_uniform_element gl_NumSamples_elements[] = {
+   {NULL, {STATE_NUM_SAMPLES, 0, 0}, SWIZZLE_XXXX}
+};
 
 static struct gl_builtin_uniform_element gl_DepthRange_elements[] = {
    {"near", {STATE_DEPTH_RANGE, 0, 0}, SWIZZLE_XXXX},
@@ -236,6 +239,7 @@ static struct gl_builtin_uniform_element gl_NormalMatrix_elements[] = {
 #define STATEVAR(name) {#name, name ## _elements, Elements(name ## _elements)}
 
 static const struct gl_builtin_uniform_desc _mesa_builtin_uniform_desc[] = {
+   STATEVAR(gl_NumSamples),
    STATEVAR(gl_DepthRange),
    STATEVAR(gl_ClipPlane),
    STATEVAR(gl_Point),
@@ -662,6 +666,7 @@ builtin_variable_generator::generate_constants()
 void
 builtin_variable_generator::generate_uniforms()
 {
+   add_uniform(int_t, "gl_NumSamples");
    add_uniform(type("gl_DepthRangeParameters"), "gl_DepthRange");
    add_uniform(array(vec4_t, VERT_ATTRIB_MAX), "gl_CurrentAttribVertMESA");
    add_uniform(array(vec4_t, VARYING_SLOT_MAX), "gl_CurrentAttribFragMESA");
@@ -838,6 +843,19 @@ builtin_variable_generator::generate_fs_special_vars()
       if (state->AMD_shader_stencil_export_warn)
          var->warn_extension = "GL_AMD_shader_stencil_export";
    }
+
+   if (state->ARB_sample_shading_enable) {
+      add_system_value(SYSTEM_VALUE_SAMPLE_ID, int_t, "gl_SampleID");
+      add_system_value(SYSTEM_VALUE_SAMPLE_POS, vec2_t, "gl_SamplePosition");
+      /* From the ARB_sample_shading specification:
+       *    "The number of elements in the array is ceil(<s>/32), where
+       *    <s> is the maximum number of color samples supported by the
+       *    implementation."
+       * Since no drivers expose more than 32x MSAA, we can simply set
+       * the array size to 1 rather than computing it.
+       */
+      add_output(FRAG_RESULT_SAMPLE_MASK, array(int_t, 1), "gl_SampleMask");
+   }
 }
 
 
diff --git a/mesalib/src/glsl/glcpp/glcpp-parse.y b/mesalib/src/glsl/glcpp/glcpp-parse.y
index 86f3cd5aa..7edc27488 100644
--- a/mesalib/src/glsl/glcpp/glcpp-parse.y
+++ b/mesalib/src/glsl/glcpp/glcpp-parse.y
@@ -1249,6 +1249,9 @@ glcpp_parser_create (const struct gl_extensions *extensions, int api)
 	      if (extensions->ARB_shading_language_420pack)
 	         add_builtin_define(parser, "GL_ARB_shading_language_420pack", 1);
 
+	      if (extensions->ARB_sample_shading)
+	         add_builtin_define(parser, "GL_ARB_sample_shading", 1);
+
 	      if (extensions->EXT_shader_integer_mix)
 	         add_builtin_define(parser, "GL_EXT_shader_integer_mix", 1);
 
diff --git a/mesalib/src/glsl/glsl_parser_extras.cpp b/mesalib/src/glsl/glsl_parser_extras.cpp
index 77e8816c4..d922db9db 100644
--- a/mesalib/src/glsl/glsl_parser_extras.cpp
+++ b/mesalib/src/glsl/glsl_parser_extras.cpp
@@ -540,6 +540,7 @@ static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
    EXT(EXT_shader_integer_mix,         true,  true,      EXT_shader_integer_mix),
    EXT(ARB_texture_gather,             true,  false,     ARB_texture_gather),
    EXT(ARB_shader_atomic_counters,     true,  false,     ARB_shader_atomic_counters),
+   EXT(ARB_sample_shading,             true,  false,     ARB_sample_shading),
 };
 
 #undef EXT
@@ -1604,6 +1605,7 @@ do_common_optimization(exec_list *ir, bool linked,
    else
       progress = do_constant_variable_unlinked(ir) || progress;
    progress = do_constant_folding(ir) || progress;
+   progress = do_cse(ir) || progress;
    progress = do_algebraic(ir) || progress;
    progress = do_lower_jumps(ir) || progress;
    progress = do_vec_index_to_swizzle(ir) || progress;
diff --git a/mesalib/src/glsl/glsl_parser_extras.h b/mesalib/src/glsl/glsl_parser_extras.h
index f22dac355..345d7a018 100644
--- a/mesalib/src/glsl/glsl_parser_extras.h
+++ b/mesalib/src/glsl/glsl_parser_extras.h
@@ -350,6 +350,8 @@ struct _mesa_glsl_parse_state {
    bool AMD_vertex_shader_layer_warn;
    bool ARB_shading_language_420pack_enable;
    bool ARB_shading_language_420pack_warn;
+   bool ARB_sample_shading_enable;
+   bool ARB_sample_shading_warn;
    bool EXT_shader_integer_mix_enable;
    bool EXT_shader_integer_mix_warn;
    bool ARB_shader_atomic_counters_enable;
diff --git a/mesalib/src/glsl/glsl_types.h b/mesalib/src/glsl/glsl_types.h
index fdb1f3a6e..96eee5e64 100644
--- a/mesalib/src/glsl/glsl_types.h
+++ b/mesalib/src/glsl/glsl_types.h
@@ -459,7 +459,7 @@ struct glsl_type {
     */
    bool contains_atomic() const
    {
-      return atomic_size();
+      return atomic_size() > 0;
    }
 
    /**
diff --git a/mesalib/src/glsl/ir.h b/mesalib/src/glsl/ir.h
index 5b30fe59b..2f06fb9ea 100644
--- a/mesalib/src/glsl/ir.h
+++ b/mesalib/src/glsl/ir.h
@@ -133,6 +133,7 @@ public:
    virtual class ir_return *            as_return()           { return NULL; }
    virtual class ir_if *                as_if()               { return NULL; }
    virtual class ir_swizzle *           as_swizzle()          { return NULL; }
+   virtual class ir_texture *           as_texture()          { return NULL; }
    virtual class ir_constant *          as_constant()         { return NULL; }
    virtual class ir_discard *           as_discard()          { return NULL; }
    virtual class ir_jump *              as_jump()             { return NULL; }
@@ -1731,6 +1732,11 @@ public:
       v->visit(this);
    }
 
+   virtual ir_texture *as_texture()
+   {
+      return this;
+   }
+
    virtual ir_visitor_status accept(ir_hierarchical_visitor *);
 
    /**
diff --git a/mesalib/src/glsl/ir_optimization.h b/mesalib/src/glsl/ir_optimization.h
index 074686c5d..3ca9f5744 100644
--- a/mesalib/src/glsl/ir_optimization.h
+++ b/mesalib/src/glsl/ir_optimization.h
@@ -77,6 +77,7 @@ bool do_constant_variable_unlinked(exec_list *instructions);
 bool do_copy_propagation(exec_list *instructions);
 bool do_copy_propagation_elements(exec_list *instructions);
 bool do_constant_propagation(exec_list *instructions);
+bool do_cse(exec_list *instructions);
 void do_dead_builtin_varyings(struct gl_context *ctx,
                               gl_shader *producer, gl_shader *consumer,
                               unsigned num_tfeedback_decls,
diff --git a/mesalib/src/glsl/opt_cse.cpp b/mesalib/src/glsl/opt_cse.cpp
new file mode 100644
index 000000000..c0fdb23e6
--- /dev/null
+++ b/mesalib/src/glsl/opt_cse.cpp
@@ -0,0 +1,599 @@
+/*
+ * Copyright © 2013 Intel Corporation
+ *
+ * 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, sublicense,
+ * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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.
+ */
+
+/**
+ * \file opt_cse.cpp
+ *
+ * constant subexpression elimination at the GLSL IR level.
+ *
+ * Compare to brw_fs_cse.cpp for a more complete CSE implementation.  This one
+ * is generic and handles texture operations, but it's rather simple currently
+ * and doesn't support modification of variables in the available expressions
+ * list, so it can't do variables other than uniforms or shader inputs.
+ */
+
+#include "ir.h"
+#include "ir_visitor.h"
+#include "ir_rvalue_visitor.h"
+#include "ir_basic_block.h"
+#include "ir_optimization.h"
+#include "ir_builder.h"
+#include "glsl_types.h"
+
+using namespace ir_builder;
+
+static bool debug = false;
+
+namespace {
+
+/**
+ * This is the record of an available expression for common subexpression
+ * elimination.
+ */
+class ae_entry : public exec_node
+{
+public:
+   ae_entry(ir_instruction *base_ir, ir_rvalue **val)
+      : val(val), base_ir(base_ir)
+   {
+      assert(val);
+      assert(*val);
+      assert(base_ir);
+
+      var = NULL;
+   }
+
+   /**
+    * The pointer to the expression that we might be able to reuse
+    *
+    * Note the double pointer -- this is the place in the base_ir expression
+    * tree that we would rewrite to move the expression out to a new variable
+    * assignment.
+    */
+   ir_rvalue **val;
+
+   /**
+    * Root instruction in the basic block where the expression appeared.
+    *
+    * This is used so that we can insert the new variable declaration into the
+    * instruction stream (since *val is just somewhere in base_ir's expression
+    * tree).
+    */
+   ir_instruction *base_ir;
+
+   /**
+    * The variable that the expression has been stored in, if it's been CSEd
+    * once already.
+    */
+   ir_variable *var;
+};
+
+class cse_visitor : public ir_rvalue_visitor {
+public:
+   cse_visitor(exec_list *validate_instructions)
+      : validate_instructions(validate_instructions)
+   {
+      progress = false;
+      mem_ctx = ralloc_context(NULL);
+      this->ae = new(mem_ctx) exec_list;
+   }
+   ~cse_visitor()
+   {
+      ralloc_free(mem_ctx);
+   }
+
+   virtual ir_visitor_status visit_enter(ir_function_signature *ir);
+   virtual ir_visitor_status visit_enter(ir_loop *ir);
+   virtual ir_visitor_status visit_enter(ir_if *ir);
+   virtual ir_visitor_status visit_enter(ir_call *ir);
+   virtual void handle_rvalue(ir_rvalue **rvalue);
+
+   bool progress;
+
+private:
+   void *mem_ctx;
+
+   ir_rvalue *try_cse(ir_rvalue *rvalue);
+   void add_to_ae(ir_rvalue **rvalue);
+
+   /** List of ae_entry: The available expressions to reuse */
+   exec_list *ae;
+
+   /**
+    * The whole shader, so that we can validate_ir_tree in debug mode.
+    *
+    * This proved quite useful when trying to get the tree manipulation
+    * right.
+    */
+   exec_list *validate_instructions;
+};
+
+/**
+ * Visitor to walk an expression tree to check that all variables referenced
+ * are constants.
+ */
+class is_cse_candidate_visitor : public ir_hierarchical_visitor
+{
+public:
+
+   is_cse_candidate_visitor()
+      : ok(true)
+   {
+   }
+
+   virtual ir_visitor_status visit(ir_dereference_variable *ir);
+
+   bool ok;
+};
+
+
+class contains_rvalue_visitor : public ir_rvalue_visitor
+{
+public:
+
+   contains_rvalue_visitor(ir_rvalue *val)
+      : val(val)
+   {
+      found = false;
+   }
+
+   virtual void handle_rvalue(ir_rvalue **rvalue);
+
+   bool found;
+
+private:
+   ir_rvalue *val;
+};
+
+} /* unnamed namespace */
+
+static void
+dump_ae(exec_list *ae)
+{
+   int i = 0;
+
+   printf("CSE: AE contents:\n");
+   foreach_list(node, ae) {
+      ae_entry *entry = (ae_entry *)node;
+
+      printf("CSE:   AE %2d (%p): ", i, entry);
+      (*entry->val)->print();
+      printf("\n");
+
+      if (entry->var)
+         printf("CSE:     in var %p:\n", entry->var);
+
+      i++;
+   }
+}
+
+ir_visitor_status
+is_cse_candidate_visitor::visit(ir_dereference_variable *ir)
+{
+   /* Currently, since we don't handle kills of the ae based on variables
+    * getting assigned, we can only handle constant variables.
+    */
+   if (ir->var->read_only) {
+      return visit_continue;
+   } else {
+      ok = false;
+      return visit_stop;
+   }
+}
+
+void
+contains_rvalue_visitor::handle_rvalue(ir_rvalue **rvalue)
+{
+   if (*rvalue == val)
+      found = true;
+}
+
+static bool
+contains_rvalue(ir_rvalue *haystack, ir_rvalue *needle)
+{
+   contains_rvalue_visitor v(needle);
+   haystack->accept(&v);
+   return v.found;
+}
+
+static bool
+is_cse_candidate(ir_rvalue *ir)
+{
+   /* Our temporary variable assignment generation isn't ready to handle
+    * anything bigger than a vector.
+    */
+   if (!ir->type->is_vector() && !ir->type->is_scalar())
+      return false;
+
+   /* Only handle expressions and textures currently.  We may want to extend
+    * to variable-index array dereferences at some point.
+    */
+   switch (ir->ir_type) {
+   case ir_type_expression:
+   case ir_type_texture:
+      break;
+   default:
+      return false;
+   }
+
+   is_cse_candidate_visitor v;
+
+   ir->accept(&v);
+
+   return v.ok;
+}
+
+static bool
+equals(ir_rvalue *a, ir_rvalue *b);
+
+static bool
+equals(ir_constant *a, ir_constant *b)
+{
+   if (!a || !b)
+      return false;
+
+   if (a->type != b->type)
+      return false;
+
+   for (unsigned i = 0; i < a->type->components(); i++) {
+      if (a->value.u[i] != b->value.u[i])
+         return false;
+   }
+
+   return true;
+}
+
+static bool
+equals(ir_dereference_variable *a, ir_dereference_variable *b)
+{
+   if (!a || !b)
+      return false;
+
+   return a->var == b->var;
+}
+
+static bool
+equals(ir_dereference_array *a, ir_dereference_array *b)
+{
+   if (!a || !b)
+      return false;
+
+   if (!equals(a->array, b->array))
+      return false;
+
+   if (!equals(a->array_index, b->array_index))
+      return false;
+
+   return true;
+}
+
+static bool
+equals(ir_swizzle *a, ir_swizzle *b)
+{
+   if (!a || !b)
+      return false;
+
+   if (a->type != b->type)
+      return false;
+
+   if (a->mask.x != b->mask.x ||
+       a->mask.y != b->mask.y ||
+       a->mask.z != b->mask.z ||
+       a->mask.w != b->mask.w) {
+      return false;
+   }
+
+   return equals(a->val, b->val);
+}
+
+static bool
+equals(ir_texture *a, ir_texture *b)
+{
+   if (!a || !b)
+      return false;
+
+   if (a->type != b->type)
+      return false;
+
+   if (a->op != b->op)
+      return false;
+
+   if (!equals(a->coordinate, b->coordinate))
+      return false;
+
+   if (!equals(a->projector, b->projector))
+      return false;
+
+   if (!equals(a->shadow_comparitor, b->shadow_comparitor))
+      return false;
+
+   if (!equals(a->offset, b->offset))
+      return false;
+
+   if (!equals(a->sampler, b->sampler))
+      return false;
+
+   switch (a->op) {
+   case ir_tex:
+   case ir_lod:
+   case ir_query_levels:
+      break;
+   case ir_txb:
+      if (!equals(a->lod_info.bias, b->lod_info.bias))
+         return false;
+      break;
+   case ir_txl:
+   case ir_txf:
+   case ir_txs:
+      if (!equals(a->lod_info.lod, b->lod_info.lod))
+         return false;
+      break;
+   case ir_txd:
+      if (!equals(a->lod_info.grad.dPdx, b->lod_info.grad.dPdx) ||
+          !equals(a->lod_info.grad.dPdy, b->lod_info.grad.dPdy))
+         return false;
+   case ir_txf_ms:
+      if (!equals(a->lod_info.sample_index, b->lod_info.sample_index))
+         return false;
+      break;
+   case ir_tg4:
+      if (!equals(a->lod_info.component, b->lod_info.component))
+         return false;
+   default:
+      assert(!"Unrecognized texture op");
+   }
+
+   return true;
+}
+
+static bool
+equals(ir_expression *a, ir_expression *b)
+{
+   if (!a || !b)
+      return false;
+
+   if (a->type != b->type)
+      return false;
+
+   if (a->operation != b->operation)
+      return false;
+
+   for (unsigned i = 0; i < a->get_num_operands(); i++) {
+      if (!equals(a->operands[i], b->operands[i]))
+         return false;
+   }
+
+   return true;
+}
+
+static bool
+equals(ir_rvalue *a, ir_rvalue *b)
+{
+   if (!a || !b)
+      return !a && !b;
+
+   if (a->type != b->type)
+      return false;
+
+   switch (a->ir_type) {
+   case ir_type_texture:
+      return equals(a->as_texture(), b->as_texture());
+
+   case ir_type_constant:
+      return equals(a->as_constant(), b->as_constant());
+
+   case ir_type_expression:
+      return equals(a->as_expression(), b->as_expression());
+
+   case ir_type_dereference_variable:
+      return equals(a->as_dereference_variable(), b->as_dereference_variable());
+
+   case ir_type_dereference_array:
+      return equals(a->as_dereference_array(), b->as_dereference_array());
+
+   case ir_type_swizzle:
+      return equals(a->as_swizzle(), b->as_swizzle());
+
+   default:
+      return false;
+   }
+}
+
+/**
+ * Tries to find and return a reference to a previous computation of a given
+ * expression.
+ *
+ * Walk the list of available expressions checking if any of them match the
+ * rvalue, and if so, move the previous copy of the expression to a temporary
+ * and return a reference of the temporary.
+ */
+ir_rvalue *
+cse_visitor::try_cse(ir_rvalue *rvalue)
+{
+   foreach_list(node, ae) {
+      ae_entry *entry = (ae_entry *)node;
+
+      if (debug) {
+         printf("Comparing to AE %p: ", entry);
+         (*entry->val)->print();
+         printf("\n");
+      }
+
+      if (!equals(rvalue, *entry->val))
+         continue;
+
+      if (debug) {
+         printf("CSE: Replacing: ");
+         (*entry->val)->print();
+         printf("\n");
+         printf("CSE:      with: ");
+         rvalue->print();
+         printf("\n");
+      }
+
+      if (!entry->var) {
+         ir_instruction *base_ir = entry->base_ir;
+
+         ir_variable *var = new(rvalue) ir_variable(rvalue->type,
+                                                    "cse",
+                                                    ir_var_auto);
+
+         /* Write the previous expression result into a new variable. */
+         base_ir->insert_before(var);
+         ir_assignment *assignment = assign(var, *entry->val);
+         base_ir->insert_before(assignment);
+
+         /* Replace the expression in the original tree with a deref of the
+          * variable, but keep tracking the expression for further reuse.
+          */
+         *entry->val = new(rvalue) ir_dereference_variable(var);
+         entry->val = &assignment->rhs;
+
+         entry->var = var;
+
+         /* Update the base_irs in the AE list.  We have to be sure that
+          * they're correct -- expressions from our base_ir that weren't moved
+          * need to stay in this base_ir (so that later consumption of them
+          * puts new variables between our new variable and our base_ir), but
+          * expressions from our base_ir that we *did* move need base_ir
+          * updated so that any further elimination from inside gets its new
+          * assignments put before our new assignment.
+          */
+         foreach_list(fixup_node, ae) {
+            ae_entry *fixup_entry = (ae_entry *)fixup_node;
+            if (contains_rvalue(assignment->rhs, *fixup_entry->val))
+               fixup_entry->base_ir = assignment;
+         }
+
+         if (debug)
+            dump_ae(ae);
+      }
+
+      /* Replace the expression in our current tree with the variable. */
+      return new(rvalue) ir_dereference_variable(entry->var);
+   }
+
+   return NULL;
+}
+
+/** Add the rvalue to the list of available expressions for CSE. */
+void
+cse_visitor::add_to_ae(ir_rvalue **rvalue)
+{
+   if (debug) {
+      printf("CSE: Add to AE: ");
+      (*rvalue)->print();
+      printf("\n");
+   }
+
+   ae->push_tail(new(mem_ctx) ae_entry(base_ir, rvalue));
+
+   if (debug)
+      dump_ae(ae);
+}
+
+void
+cse_visitor::handle_rvalue(ir_rvalue **rvalue)
+{
+   if (!*rvalue)
+      return;
+
+   if (debug) {
+      printf("CSE: handle_rvalue ");
+      (*rvalue)->print();
+      printf("\n");
+   }
+
+   if (!is_cse_candidate(*rvalue))
+      return;
+
+   ir_rvalue *new_rvalue = try_cse(*rvalue);
+   if (new_rvalue) {
+      *rvalue = new_rvalue;
+      progress = true;
+
+      if (debug)
+         validate_ir_tree(validate_instructions);
+   } else {
+      add_to_ae(rvalue);
+   }
+}
+
+ir_visitor_status
+cse_visitor::visit_enter(ir_if *ir)
+{
+   handle_rvalue(&ir->condition);
+
+   ae->make_empty();
+   visit_list_elements(this, &ir->then_instructions);
+
+   ae->make_empty();
+   visit_list_elements(this, &ir->else_instructions);
+
+   ae->make_empty();
+   return visit_continue_with_parent;
+}
+
+ir_visitor_status
+cse_visitor::visit_enter(ir_function_signature *ir)
+{
+   ae->make_empty();
+   visit_list_elements(this, &ir->body);
+
+   ae->make_empty();
+   return visit_continue_with_parent;
+}
+
+ir_visitor_status
+cse_visitor::visit_enter(ir_loop *ir)
+{
+   ae->make_empty();
+   visit_list_elements(this, &ir->body_instructions);
+
+   ae->make_empty();
+   return visit_continue_with_parent;
+}
+
+ir_visitor_status
+cse_visitor::visit_enter(ir_call *ir)
+{
+   /* Because call is an exec_list of ir_rvalues, handle_rvalue gets passed a
+    * pointer to the (ir_rvalue *) on the stack.  Since we save those pointers
+    * in the AE list, we can't let handle_rvalue get called.
+    */
+   return visit_continue_with_parent;
+}
+
+/**
+ * Does a (uniform-value) constant subexpression elimination pass on the code
+ * present in the instruction stream.
+ */
+bool
+do_cse(exec_list *instructions)
+{
+   cse_visitor v(instructions);
+
+   visit_list_elements(&v, instructions);
+
+   return v.progress;
+}
diff --git a/mesalib/src/glsl/standalone_scaffolding.cpp b/mesalib/src/glsl/standalone_scaffolding.cpp
index 7a1cf6877..cbff6d182 100644
--- a/mesalib/src/glsl/standalone_scaffolding.cpp
+++ b/mesalib/src/glsl/standalone_scaffolding.cpp
@@ -97,6 +97,7 @@ void initialize_context_to_defaults(struct gl_context *ctx, gl_api api)
    ctx->Extensions.ARB_explicit_attrib_location = true;
    ctx->Extensions.ARB_fragment_coord_conventions = true;
    ctx->Extensions.ARB_gpu_shader5 = true;
+   ctx->Extensions.ARB_sample_shading = true;
    ctx->Extensions.ARB_shader_bit_encoding = true;
    ctx->Extensions.ARB_shader_stencil_export = true;
    ctx->Extensions.ARB_shader_texture_lod = true;
diff --git a/mesalib/src/mapi/glapi/gen/ARB_sample_shading.xml b/mesalib/src/mapi/glapi/gen/ARB_sample_shading.xml
new file mode 100644
index 000000000..cc8296a47
--- /dev/null
+++ b/mesalib/src/mapi/glapi/gen/ARB_sample_shading.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0"?>
+<!DOCTYPE OpenGLAPI SYSTEM "gl_API.dtd">
+
+<!-- Note: no GLX protocol info yet. -->
+
+<OpenGLAPI>
+
+<category name="GL_ARB_sample_shading" number="70">
+
+   <enum name="SAMPLE_SHADING_ARB"                          value="0x8C36"/>
+   <enum name="MIN_SAMPLE_SHADING_VALUE_ARB"                value="0x8C37"/>
+
+   <function name="MinSampleShadingARB" alias="MinSampleShading">
+      <param name="value" type="GLfloat"/>
+   </function>
+
+</category>
+
+</OpenGLAPI>
diff --git a/mesalib/src/mapi/glapi/gen/GL4x.xml b/mesalib/src/mapi/glapi/gen/GL4x.xml
new file mode 100644
index 000000000..6706278ce
--- /dev/null
+++ b/mesalib/src/mapi/glapi/gen/GL4x.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0"?>
+<!DOCTYPE OpenGLAPI SYSTEM "gl_API.dtd">
+
+<!-- Note: no GLX protocol info yet. -->
+
+<OpenGLAPI>
+
+<category name="4.0">
+  <enum name="SAMPLE_SHADING"                          value="0x8C36"/>
+  <enum name="MIN_SAMPLE_SHADING_VALUE"                value="0x8C37"/>
+
+  <function name="MinSampleShading" offset="assign">
+    <param name="value" type="GLfloat"/>
+  </function>
+</category>
+
+<category name="4.3">
+
+</category>
+
+</OpenGLAPI>
diff --git a/mesalib/src/mapi/glapi/gen/Makefile.am b/mesalib/src/mapi/glapi/gen/Makefile.am
index 390245216..cbbf659dd 100644
--- a/mesalib/src/mapi/glapi/gen/Makefile.am
+++ b/mesalib/src/mapi/glapi/gen/Makefile.am
@@ -108,6 +108,7 @@ API_XML = \
 	ARB_invalidate_subdata.xml \
 	ARB_map_buffer_range.xml \
 	ARB_robustness.xml \
+	ARB_sample_shading.xml \
 	ARB_sampler_objects.xml \
 	ARB_seamless_cube_map.xml \
 	ARB_shader_atomic_counters.xml \
@@ -144,7 +145,9 @@ API_XML = \
 	NV_texture_barrier.xml \
 	NV_vdpau_interop.xml \
 	OES_EGL_image.xml \
-	GL3x.xml
+	GL3x.xml \
+	GL4x.xml
+
 
 
 COMMON = $(API_XML) \
diff --git a/mesalib/src/mapi/glapi/gen/gl_API.xml b/mesalib/src/mapi/glapi/gen/gl_API.xml
index 45d69b40a..69014c5d2 100644
--- a/mesalib/src/mapi/glapi/gen/gl_API.xml
+++ b/mesalib/src/mapi/glapi/gen/gl_API.xml
@@ -8187,7 +8187,7 @@
 <xi:include href="ARB_draw_buffers_blend.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
 <xi:include href="AMD_draw_buffers_blend.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
 
-<!-- 70. GL_ARB_sample_shading -->
+<xi:include href="ARB_sample_shading.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
 <xi:include href="ARB_texture_cube_map_array.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
 <xi:include href="ARB_texture_gather.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
 <!-- 73. GL_ARB_texture_query_lod -->
@@ -13122,4 +13122,6 @@
 
 <xi:include href="NV_vdpau_interop.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
 
+<xi:include href="GL4x.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
+
 </OpenGLAPI>
diff --git a/mesalib/src/mesa/drivers/common/meta.c b/mesalib/src/mesa/drivers/common/meta.c
index 798efa680..aa50dde73 100644
--- a/mesalib/src/mesa/drivers/common/meta.c
+++ b/mesalib/src/mesa/drivers/common/meta.c
@@ -1729,10 +1729,10 @@ blitframebuffer_texture(struct gl_context *ctx,
             }
             else {
                assert(target == GL_TEXTURE_RECTANGLE_ARB);
-               s0 = srcX0;
-               s1 = srcX1;
-               t0 = srcY0;
-               t1 = srcY1;
+               s0 = (float) srcX0;
+               s1 = (float) srcX1;
+               t0 = (float) srcY0;
+               t1 = (float) srcY1;
             }
 
             /* setup vertex positions */
@@ -2825,7 +2825,7 @@ _mesa_meta_DrawPixels(struct gl_context *ctx,
             _mesa_StencilMask(mask);
 
             _mesa_ProgramLocalParameter4fARB(GL_FRAGMENT_PROGRAM_ARB, 0,
-                                             255.0 / mask, 0.5, 0.0, 0.0);
+                                             255.0f / mask, 0.5f, 0.0f, 0.0f);
 
             _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
          }
@@ -3184,7 +3184,7 @@ setup_texture_coords(GLenum faceTarget,
          r = (slice + 0.5f) / depth;
       }
       else if (faceTarget == GL_TEXTURE_2D_ARRAY)
-         r = slice;
+         r = (float) slice;
       else
          r = 0.0F;
       coords0[0] = 0.0F; /* s */
@@ -3204,28 +3204,28 @@ setup_texture_coords(GLenum faceTarget,
       coords0[0] = 0.0F; /* s */
       coords0[1] = 0.0F; /* t */
       coords0[2] = 0.0F; /* r */
-      coords1[0] = width;
+      coords1[0] = (float) width;
       coords1[1] = 0.0F;
       coords1[2] = 0.0F;
-      coords2[0] = width;
-      coords2[1] = height;
+      coords2[0] = (float) width;
+      coords2[1] = (float) height;
       coords2[2] = 0.0F;
       coords3[0] = 0.0F;
-      coords3[1] = height;
+      coords3[1] = (float) height;
       coords3[2] = 0.0F;
       break;
    case GL_TEXTURE_1D_ARRAY:
       coords0[0] = 0.0F; /* s */
-      coords0[1] = slice; /* t */
+      coords0[1] = (float) slice; /* t */
       coords0[2] = 0.0F; /* r */
       coords1[0] = 1.0f;
-      coords1[1] = slice;
+      coords1[1] = (float) slice;
       coords1[2] = 0.0F;
       coords2[0] = 1.0F;
-      coords2[1] = slice;
+      coords2[1] = (float) slice;
       coords2[2] = 0.0F;
       coords3[0] = 0.0F;
-      coords3[1] = slice;
+      coords3[1] = (float) slice;
       coords3[2] = 0.0F;
       break;
 
diff --git a/mesalib/src/mesa/main/dd.h b/mesalib/src/mesa/main/dd.h
index 501192199..d7c432713 100644
--- a/mesalib/src/mesa/main/dd.h
+++ b/mesalib/src/mesa/main/dd.h
@@ -843,6 +843,14 @@ struct dd_function_table {
                                    struct gl_transform_feedback_object *obj);
 
    /**
+    * Return the number of vertices written to a stream during the last
+    * Begin/EndTransformFeedback block.
+    */
+   GLsizei (*GetTransformFeedbackVertexCount)(struct gl_context *ctx,
+                                              struct gl_transform_feedback_object *obj,
+                                              GLuint stream);
+
+   /**
     * \name GL_NV_texture_barrier interface
     */
    void (*TextureBarrier)(struct gl_context *ctx);
diff --git a/mesalib/src/mesa/main/enable.c b/mesalib/src/mesa/main/enable.c
index 5e2fd80d2..dd6a772f9 100644
--- a/mesalib/src/mesa/main/enable.c
+++ b/mesalib/src/mesa/main/enable.c
@@ -802,6 +802,17 @@ _mesa_set_enable(struct gl_context *ctx, GLenum cap, GLboolean state)
          ctx->Multisample.SampleCoverageInvert = state;
          break;
 
+      /* GL_ARB_sample_shading */
+      case GL_SAMPLE_SHADING:
+         if (!_mesa_is_desktop_gl(ctx))
+            goto invalid_enum_error;
+         CHECK_EXTENSION(ARB_sample_shading, cap);
+         if (ctx->Multisample.SampleShading == state)
+            return;
+         FLUSH_VERTICES(ctx, _NEW_MULTISAMPLE);
+         ctx->Multisample.SampleShading = state;
+         break;
+
       /* GL_IBM_rasterpos_clip */
       case GL_RASTER_POSITION_UNCLIPPED_IBM:
          if (ctx->API != API_OPENGL_COMPAT)
@@ -1594,6 +1605,13 @@ _mesa_IsEnabled( GLenum cap )
          CHECK_EXTENSION(ARB_texture_multisample);
          return ctx->Multisample.SampleMask;
 
+      /* ARB_sample_shading */
+      case GL_SAMPLE_SHADING:
+         if (!_mesa_is_desktop_gl(ctx))
+            goto invalid_enum_error;
+         CHECK_EXTENSION(ARB_sample_shading);
+         return ctx->Multisample.SampleShading;
+
       default:
          goto invalid_enum_error;
    }
diff --git a/mesalib/src/mesa/main/extensions.c b/mesalib/src/mesa/main/extensions.c
index 285ec377c..48c4e9f1b 100644
--- a/mesalib/src/mesa/main/extensions.c
+++ b/mesalib/src/mesa/main/extensions.c
@@ -118,6 +118,7 @@ static const struct extension extension_table[] = {
    { "GL_ARB_point_sprite",                        o(ARB_point_sprite),                        GL,             2003 },
    { "GL_ARB_provoking_vertex",                    o(EXT_provoking_vertex),                    GL,             2009 },
    { "GL_ARB_robustness",                          o(dummy_true),                              GL,             2010 },
+   { "GL_ARB_sample_shading",                      o(ARB_sample_shading),                      GL,             2009 },
    { "GL_ARB_sampler_objects",                     o(dummy_true),                              GL,             2009 },
    { "GL_ARB_seamless_cube_map",                   o(ARB_seamless_cube_map),                   GL,             2009 },
    { "GL_ARB_shader_atomic_counters",              o(ARB_shader_atomic_counters),              GL,             2011 },
diff --git a/mesalib/src/mesa/main/get.c b/mesalib/src/mesa/main/get.c
index 6e72ff5c2..6a0de0c16 100644
--- a/mesalib/src/mesa/main/get.c
+++ b/mesalib/src/mesa/main/get.c
@@ -131,6 +131,7 @@ enum value_extra {
    EXTRA_VERSION_30,
    EXTRA_VERSION_31,
    EXTRA_VERSION_32,
+   EXTRA_VERSION_40,
    EXTRA_API_GL,
    EXTRA_API_GL_CORE,
    EXTRA_API_ES2,
@@ -391,6 +392,7 @@ extra_NV_primitive_restart[] = {
 static const int extra_version_30[] = { EXTRA_VERSION_30, EXTRA_END };
 static const int extra_version_31[] = { EXTRA_VERSION_31, EXTRA_END };
 static const int extra_version_32[] = { EXTRA_VERSION_32, EXTRA_END };
+static const int extra_version_40[] = { EXTRA_VERSION_40, EXTRA_END };
 
 static const int extra_gl30_es3[] = {
     EXTRA_VERSION_30,
@@ -410,6 +412,12 @@ static const int extra_gl32_ARB_geometry_shader4[] = {
     EXTRA_END
 };
 
+static const int extra_gl40_ARB_sample_shading[] = {
+   EXTRA_VERSION_40,
+   EXT(ARB_sample_shading),
+   EXTRA_END
+};
+
 static const int
 extra_ARB_vertex_program_api_es2[] = {
    EXT(ARB_vertex_program),
diff --git a/mesalib/src/mesa/main/get_hash_params.py b/mesalib/src/mesa/main/get_hash_params.py
index 9f79f3406..0851b7b70 100644
--- a/mesalib/src/mesa/main/get_hash_params.py
+++ b/mesalib/src/mesa/main/get_hash_params.py
@@ -83,6 +83,9 @@ descriptor=[
   [ "SAMPLE_BUFFERS_ARB", "BUFFER_INT(Visual.sampleBuffers), extra_new_buffers" ],
   [ "SAMPLES_ARB", "BUFFER_INT(Visual.samples), extra_new_buffers" ],
 
+# GL_ARB_sample_shading
+  [ "MIN_SAMPLE_SHADING_VALUE_ARB", "CONTEXT_FLOAT(Multisample.MinSampleShadingValue), extra_gl40_ARB_sample_shading" ],
+
 # GL_SGIS_generate_mipmap
   [ "GENERATE_MIPMAP_HINT_SGIS", "CONTEXT_ENUM(Hint.GenerateMipmap), NO_EXTRA" ],
 
diff --git a/mesalib/src/mesa/main/mtypes.h b/mesalib/src/mesa/main/mtypes.h
index a1a5eb4bf..b5c5583d6 100644
--- a/mesalib/src/mesa/main/mtypes.h
+++ b/mesalib/src/mesa/main/mtypes.h
@@ -274,6 +274,11 @@ typedef enum
 #define VARYING_BIT_VAR(V) BITFIELD64_BIT(VARYING_SLOT_VAR0 + (V))
 /*@}*/
 
+/**
+ * Bitflags for system values.
+ */
+#define SYSTEM_BIT_SAMPLE_ID BITFIELD64_BIT(SYSTEM_VALUE_SAMPLE_ID)
+#define SYSTEM_BIT_SAMPLE_POS BITFIELD64_BIT(SYSTEM_VALUE_SAMPLE_POS)
 
 /**
  * Determine if the given gl_varying_slot appears in the fragment shader.
@@ -306,12 +311,13 @@ typedef enum
     * register is written.  No FRAG_RESULT_DATAn will be written.
     */
    FRAG_RESULT_COLOR = 2,
+   FRAG_RESULT_SAMPLE_MASK = 3,
 
    /* FRAG_RESULT_DATAn are the per-render-target (GLSL gl_FragData[n]
     * or ARB_fragment_program fragment.color[n]) color results.  If
     * any are written, FRAG_RESULT_COLOR will not be written.
     */
-   FRAG_RESULT_DATA0 = 3,
+   FRAG_RESULT_DATA0 = 4,
    FRAG_RESULT_MAX = (FRAG_RESULT_DATA0 + MAX_DRAW_BUFFERS)
 } gl_frag_result;
 
@@ -872,6 +878,8 @@ struct gl_multisample_attrib
    GLboolean SampleCoverage;
    GLfloat SampleCoverageValue;
    GLboolean SampleCoverageInvert;
+   GLboolean SampleShading;
+   GLfloat MinSampleShadingValue;
 
    /* ARB_texture_multisample / GL3.2 additions */
    GLboolean SampleMask;
@@ -1902,6 +1910,8 @@ typedef enum
    SYSTEM_VALUE_FRONT_FACE,  /**< Fragment shader only (not done yet) */
    SYSTEM_VALUE_VERTEX_ID,   /**< Vertex shader only */
    SYSTEM_VALUE_INSTANCE_ID, /**< Vertex shader only */
+   SYSTEM_VALUE_SAMPLE_ID,   /**< Fragment shader only */
+   SYSTEM_VALUE_SAMPLE_POS,  /**< Fragment shader only */
    SYSTEM_VALUE_MAX          /**< Number of values */
 } gl_system_value;
 
@@ -3156,6 +3166,12 @@ struct gl_constants
     */
    GLboolean PrimitiveRestartInSoftware;
 
+   /**
+    * Always use the GetTransformFeedbackVertexCount() driver hook, rather
+    * than passing the transform feedback object to the drawing function.
+    */
+   GLboolean AlwaysUseGetTransformFeedbackVertexCount;
+
    /** GL_ARB_map_buffer_alignment */
    GLuint MinMapBufferAlignment;
 
@@ -3239,6 +3255,7 @@ struct gl_extensions
    GLboolean ARB_occlusion_query;
    GLboolean ARB_occlusion_query2;
    GLboolean ARB_point_sprite;
+   GLboolean ARB_sample_shading;
    GLboolean ARB_seamless_cube_map;
    GLboolean ARB_shader_atomic_counters;
    GLboolean ARB_shader_bit_encoding;
diff --git a/mesalib/src/mesa/main/multisample.c b/mesalib/src/mesa/main/multisample.c
index bd97c5096..599cdee74 100644
--- a/mesalib/src/mesa/main/multisample.c
+++ b/mesalib/src/mesa/main/multisample.c
@@ -119,6 +119,24 @@ _mesa_SampleMaski(GLuint index, GLbitfield mask)
    ctx->Multisample.SampleMaskValue = mask;
 }
 
+/**
+ * Called via glMinSampleShadingARB
+ */
+void GLAPIENTRY
+_mesa_MinSampleShading(GLclampf value)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   if (!ctx->Extensions.ARB_sample_shading || !_mesa_is_desktop_gl(ctx)) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glMinSampleShading");
+      return;
+   }
+
+   FLUSH_VERTICES(ctx, 0);
+
+   ctx->Multisample.MinSampleShadingValue = CLAMP(value, 0.0, 1.0);
+   ctx->NewState |= _NEW_MULTISAMPLE;
+}
 
 /**
  * Helper for checking a requested sample count against the limit
diff --git a/mesalib/src/mesa/main/multisample.h b/mesalib/src/mesa/main/multisample.h
index 66848d269..7441d3ee9 100644
--- a/mesalib/src/mesa/main/multisample.h
+++ b/mesalib/src/mesa/main/multisample.h
@@ -44,6 +44,8 @@ _mesa_GetMultisamplefv(GLenum pname, GLuint index, GLfloat* val);
 extern void GLAPIENTRY
 _mesa_SampleMaski(GLuint index, GLbitfield mask);
 
+extern void GLAPIENTRY
+_mesa_MinSampleShading(GLclampf value);
 
 extern GLenum
 _mesa_check_sample_count(struct gl_context *ctx, GLenum target,
diff --git a/mesalib/src/mesa/main/performance_monitor.c b/mesalib/src/mesa/main/performance_monitor.c
index 8dfa8261e..17cae5183 100644
--- a/mesalib/src/mesa/main/performance_monitor.c
+++ b/mesalib/src/mesa/main/performance_monitor.c
@@ -127,7 +127,7 @@ _mesa_GetPerfMonitorGroupsAMD(GLint *numGroups, GLsizei groupsSize,
 
    if (groupsSize > 0 && groups != NULL) {
       unsigned i;
-      unsigned n = MIN2(groupsSize, ctx->PerfMonitor.NumGroups);
+      unsigned n = MIN2((GLuint) groupsSize, ctx->PerfMonitor.NumGroups);
 
       /* We just use the index in the Groups array as the ID. */
       for (i = 0; i < n; i++)
@@ -156,7 +156,7 @@ _mesa_GetPerfMonitorCountersAMD(GLuint group, GLint *numCounters,
 
    if (counters != NULL) {
       unsigned i;
-      unsigned n = MIN2(group_obj->NumCounters, countersSize);
+      unsigned n = MIN2(group_obj->NumCounters, (GLuint) countersSize);
       for (i = 0; i < n; i++) {
          /* We just use the index in the Counters array as the ID. */
          counters[i] = i;
@@ -379,7 +379,7 @@ _mesa_SelectPerfMonitorCountersAMD(GLuint monitor, GLboolean enable,
                                    GLuint *counterList)
 {
    GET_CURRENT_CONTEXT(ctx);
-   unsigned i;
+   int i;
    struct gl_perf_monitor_object *m;
    const struct gl_perf_monitor_group *group_obj;
 
diff --git a/mesalib/src/mesa/main/transformfeedback.c b/mesalib/src/mesa/main/transformfeedback.c
index bc9b52ab9..76d213b16 100644
--- a/mesalib/src/mesa/main/transformfeedback.c
+++ b/mesalib/src/mesa/main/transformfeedback.c
@@ -205,17 +205,27 @@ _mesa_free_transform_feedback(struct gl_context *ctx)
 }
 
 
+/** Initialize the fields of a gl_transform_feedback_object. */
+void
+_mesa_init_transform_feedback_object(struct gl_transform_feedback_object *obj,
+                                     GLuint name)
+{
+   if (!obj)
+      return;
+
+   obj->Name = name;
+   obj->RefCount = 1;
+   obj->EverBound = GL_FALSE;
+}
+
+
 /** Default fallback for ctx->Driver.NewTransformFeedback() */
 static struct gl_transform_feedback_object *
 new_transform_feedback(struct gl_context *ctx, GLuint name)
 {
    struct gl_transform_feedback_object *obj;
    obj = CALLOC_STRUCT(gl_transform_feedback_object);
-   if (obj) {
-      obj->Name = name;
-      obj->RefCount = 1;
-      obj->EverBound = GL_FALSE;
-   }
+   _mesa_init_transform_feedback_object(obj, name);
    return obj;
 }
 
diff --git a/mesalib/src/mesa/main/transformfeedback.h b/mesalib/src/mesa/main/transformfeedback.h
index 0ffaab508..7aecd66a7 100644
--- a/mesalib/src/mesa/main/transformfeedback.h
+++ b/mesalib/src/mesa/main/transformfeedback.h
@@ -91,6 +91,9 @@ _mesa_GetTransformFeedbackVarying(GLuint program, GLuint index,
 
 
 /*** GL_ARB_transform_feedback2 ***/
+extern void
+_mesa_init_transform_feedback_object(struct gl_transform_feedback_object *obj,
+                                     GLuint name);
 
 struct gl_transform_feedback_object *
 _mesa_lookup_transform_feedback_object(struct gl_context *ctx, GLuint name);
diff --git a/mesalib/src/mesa/main/uniforms.c b/mesalib/src/mesa/main/uniforms.c
index 2e847fe31..17e24f678 100644
--- a/mesalib/src/mesa/main/uniforms.c
+++ b/mesalib/src/mesa/main/uniforms.c
@@ -853,7 +853,7 @@ _mesa_GetActiveAtomicCounterBufferiv(GLuint program, GLuint bufferIndex,
    GET_CURRENT_CONTEXT(ctx);
    struct gl_shader_program *shProg;
    struct gl_active_atomic_buffer *ab;
-   int i;
+   GLuint i;
 
    if (!ctx->Extensions.ARB_shader_atomic_counters) {
       _mesa_error(ctx, GL_INVALID_OPERATION,
diff --git a/mesalib/src/mesa/main/vdpau.c b/mesalib/src/mesa/main/vdpau.c
index e21a26b43..359757607 100644
--- a/mesalib/src/mesa/main/vdpau.c
+++ b/mesalib/src/mesa/main/vdpau.c
@@ -324,7 +324,7 @@ void GLAPIENTRY
 _mesa_VDPAUMapSurfacesNV(GLsizei numSurfaces, const GLintptr *surfaces)
 {
    GET_CURRENT_CONTEXT(ctx);
-   int i, j;
+   int i;
 
    if (!ctx->vdpDevice || !ctx->vdpGetProcAddress || !ctx->vdpSurfaces) {
       _mesa_error(ctx, GL_INVALID_OPERATION, "VDPAUUnmapSurfacesNV");
@@ -348,6 +348,7 @@ _mesa_VDPAUMapSurfacesNV(GLsizei numSurfaces, const GLintptr *surfaces)
    for (i = 0; i < numSurfaces; ++i) {
       struct vdp_surface *surf = (struct vdp_surface *)surfaces[i];
       unsigned numTextureNames = surf->output ? 1 : 4;
+      unsigned j;
 
       for (j = 0; j < numTextureNames; ++j) {
          struct gl_texture_object *tex = surf->textures[j];
@@ -377,7 +378,7 @@ void GLAPIENTRY
 _mesa_VDPAUUnmapSurfacesNV(GLsizei numSurfaces, const GLintptr *surfaces)
 {
    GET_CURRENT_CONTEXT(ctx);
-   int i, j;
+   int i;
 
    if (!ctx->vdpDevice || !ctx->vdpGetProcAddress || !ctx->vdpSurfaces) {
       _mesa_error(ctx, GL_INVALID_OPERATION, "VDPAUUnmapSurfacesNV");
@@ -401,6 +402,7 @@ _mesa_VDPAUUnmapSurfacesNV(GLsizei numSurfaces, const GLintptr *surfaces)
    for (i = 0; i < numSurfaces; ++i) {
       struct vdp_surface *surf = (struct vdp_surface *)surfaces[i];
       unsigned numTextureNames = surf->output ? 1 : 4;
+      unsigned j;
 
       for (j = 0; j < numTextureNames; ++j) {
          struct gl_texture_object *tex = surf->textures[j];
diff --git a/mesalib/src/mesa/program/prog_print.c b/mesalib/src/mesa/program/prog_print.c
index cf852132d..fa9063f5b 100644
--- a/mesalib/src/mesa/program/prog_print.c
+++ b/mesalib/src/mesa/program/prog_print.c
@@ -311,6 +311,7 @@ arb_output_attrib_string(GLint index, GLenum progType)
       "result.depth", /* FRAG_RESULT_DEPTH */
       "result.(one)", /* FRAG_RESULT_STENCIL */
       "result.color", /* FRAG_RESULT_COLOR */
+      "result.samplemask", /* FRAG_RESULT_SAMPLE_MASK */
       "result.color[0]", /* FRAG_RESULT_DATA0 (named for GLSL's gl_FragData) */
       "result.color[1]",
       "result.color[2]",
diff --git a/mesalib/src/mesa/program/prog_statevars.c b/mesalib/src/mesa/program/prog_statevars.c
index 145c07c67..f6fd53576 100644
--- a/mesalib/src/mesa/program/prog_statevars.c
+++ b/mesalib/src/mesa/program/prog_statevars.c
@@ -349,6 +349,9 @@ _mesa_fetch_state(struct gl_context *ctx, const gl_state_index state[],
          }
       }
       return;
+   case STATE_NUM_SAMPLES:
+      ((int *)value)[0] = ctx->DrawBuffer->Visual.samples;
+      return;
    case STATE_DEPTH_RANGE:
       value[0] = ctx->Viewport.Near;                     /* near       */
       value[1] = ctx->Viewport.Far;                      /* far        */
@@ -665,6 +668,9 @@ _mesa_program_state_flags(const gl_state_index state[STATE_LENGTH])
    case STATE_PROGRAM_MATRIX:
       return _NEW_TRACK_MATRIX;
 
+   case STATE_NUM_SAMPLES:
+      return _NEW_BUFFERS;
+
    case STATE_DEPTH_RANGE:
       return _NEW_VIEWPORT;
 
@@ -852,6 +858,9 @@ append_token(char *dst, gl_state_index k)
    case STATE_TEXENV_COLOR:
       append(dst, "texenv");
       break;
+   case STATE_NUM_SAMPLES:
+      append(dst, "numsamples");
+      break;
    case STATE_DEPTH_RANGE:
       append(dst, "depth.range");
       break;
@@ -1027,6 +1036,8 @@ _mesa_program_state_string(const gl_state_index state[STATE_LENGTH])
       break;
    case STATE_FOG_COLOR:
       break;
+   case STATE_NUM_SAMPLES:
+      break;
    case STATE_DEPTH_RANGE:
       break;
    case STATE_FRAGMENT_PROGRAM:
diff --git a/mesalib/src/mesa/program/prog_statevars.h b/mesalib/src/mesa/program/prog_statevars.h
index ec22b7376..23a9f48c3 100644
--- a/mesalib/src/mesa/program/prog_statevars.h
+++ b/mesalib/src/mesa/program/prog_statevars.h
@@ -103,6 +103,8 @@ typedef enum gl_state_index_ {
 
    STATE_TEXENV_COLOR,
 
+   STATE_NUM_SAMPLES,    /* An integer, not a float like the other state vars */
+
    STATE_DEPTH_RANGE,
 
    STATE_VERTEX_PROGRAM,
diff --git a/mesalib/src/mesa/program/program.c b/mesalib/src/mesa/program/program.c
index 093d37297..a102ec17a 100644
--- a/mesalib/src/mesa/program/program.c
+++ b/mesalib/src/mesa/program/program.c
@@ -32,6 +32,7 @@
 #include "main/glheader.h"
 #include "main/context.h"
 #include "main/hash.h"
+#include "main/macros.h"
 #include "program.h"
 #include "prog_cache.h"
 #include "prog_parameter.h"
@@ -1024,3 +1025,34 @@ _mesa_postprocess_program(struct gl_context *ctx, struct gl_program *prog)
 
    }
 }
+
+/* Gets the minimum number of shader invocations per fragment.
+ * This function is useful to determine if we need to do per
+ * sample shading or per fragment shading.
+ */
+GLint
+_mesa_get_min_invocations_per_fragment(struct gl_context *ctx,
+                                       const struct gl_fragment_program *prog)
+{
+   /* From ARB_sample_shading specification:
+    * "Using gl_SampleID in a fragment shader causes the entire shader
+    *  to be evaluated per-sample."
+    *
+    * "Using gl_SamplePosition in a fragment shader causes the entire
+    *  shader to be evaluated per-sample."
+    *
+    * "If MULTISAMPLE or SAMPLE_SHADING_ARB is disabled, sample shading
+    *  has no effect."
+    */
+   if (ctx->Multisample.Enabled) {
+      if (prog->Base.SystemValuesRead & (SYSTEM_BIT_SAMPLE_ID |
+                                         SYSTEM_BIT_SAMPLE_POS))
+         return MAX2(ctx->DrawBuffer->Visual.samples, 1);
+      else if (ctx->Multisample.SampleShading)
+         return MAX2(ceil(ctx->Multisample.MinSampleShadingValue *
+                          ctx->DrawBuffer->Visual.samples), 1);
+      else
+         return 1;
+   }
+   return 1;
+}
diff --git a/mesalib/src/mesa/program/program.h b/mesalib/src/mesa/program/program.h
index 34965ab99..353ccab47 100644
--- a/mesalib/src/mesa/program/program.h
+++ b/mesalib/src/mesa/program/program.h
@@ -187,6 +187,9 @@ _mesa_valid_register_index(const struct gl_context *ctx,
 extern void
 _mesa_postprocess_program(struct gl_context *ctx, struct gl_program *prog);
 
+extern GLint
+_mesa_get_min_invocations_per_fragment(struct gl_context *ctx,
+                                       const struct gl_fragment_program *prog);
 
 static inline GLuint
 _mesa_program_target_to_index(GLenum v)
diff --git a/mesalib/src/mesa/state_tracker/st_cb_xformfb.c b/mesalib/src/mesa/state_tracker/st_cb_xformfb.c
index e1a7a88a1..e824fe9b3 100644
--- a/mesalib/src/mesa/state_tracker/st_cb_xformfb.c
+++ b/mesalib/src/mesa/state_tracker/st_cb_xformfb.c
@@ -74,8 +74,8 @@ st_new_transform_feedback(struct gl_context *ctx, GLuint name)
    if (!obj)
       return NULL;
 
-   obj->base.Name = name;
-   obj->base.RefCount = 1;
+   _mesa_init_transform_feedback_object(&obj->base, name);
+
    return &obj->base;
 }
 
diff --git a/mesalib/src/mesa/state_tracker/st_draw.h b/mesalib/src/mesa/state_tracker/st_draw.h
index 3313fc8c7..394473b20 100644
--- a/mesalib/src/mesa/state_tracker/st_draw.h
+++ b/mesalib/src/mesa/state_tracker/st_draw.h
@@ -77,7 +77,7 @@ st_feedback_draw_vbo(struct gl_context *ctx,
 static INLINE unsigned
 pointer_to_offset(const void *ptr)
 {
-   return (unsigned) (((unsigned long) ptr) & 0xffffffffUL);
+   return (unsigned) (((GLsizeiptr) ptr) & 0xffffffffUL);
 }
 
 
diff --git a/mesalib/src/mesa/swrast/s_texfetch_tmp.h b/mesalib/src/mesa/swrast/s_texfetch_tmp.h
index 7a687532d..e2521b50c 100644
--- a/mesalib/src/mesa/swrast/s_texfetch_tmp.h
+++ b/mesalib/src/mesa/swrast/s_texfetch_tmp.h
@@ -1537,7 +1537,7 @@ static void FETCH(f_z24_s8)( const struct swrast_texture_image *texImage,
    /* only return Z, not stencil data */
    const GLuint *src = TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
    const GLdouble scale = 1.0 / (GLdouble) 0xffffff;
-   texel[0] = ((*src) >> 8) * scale;
+   texel[0] = (GLfloat) (((*src) >> 8) * scale);
    ASSERT(texImage->Base.TexFormat == MESA_FORMAT_Z24_S8 ||
 	  texImage->Base.TexFormat == MESA_FORMAT_Z24_X8);
    ASSERT(texel[0] >= 0.0F);
@@ -1555,7 +1555,7 @@ static void FETCH(f_s8_z24)( const struct swrast_texture_image *texImage,
    /* only return Z, not stencil data */
    const GLuint *src = TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
    const GLdouble scale = 1.0 / (GLdouble) 0xffffff;
-   texel[0] = ((*src) & 0x00ffffff) * scale;
+   texel[0] = (GLfloat) (((*src) & 0x00ffffff) * scale);
    ASSERT(texImage->Base.TexFormat == MESA_FORMAT_S8_Z24 ||
 	  texImage->Base.TexFormat == MESA_FORMAT_X8_Z24);
    ASSERT(texel[0] >= 0.0F);
diff --git a/mesalib/src/mesa/vbo/vbo_attrib_tmp.h b/mesalib/src/mesa/vbo/vbo_attrib_tmp.h
index 02c283da4..bbc020539 100644
--- a/mesalib/src/mesa/vbo/vbo_attrib_tmp.h
+++ b/mesalib/src/mesa/vbo/vbo_attrib_tmp.h
@@ -140,7 +140,7 @@ static inline float conv_i10_to_norm_float(const struct gl_context *ctx, int i10
        (ctx->API == API_OPENGL_CORE && ctx->Version >= 42)) {
       /* Equation 2.3 above. */
       float f = ((float) val.x) / 511.0F;
-      return MAX2(f, -1.0);
+      return MAX2(f, -1.0f);
    } else {
       /* Equation 2.2 above. */
       return (2.0F * (float)val.x + 1.0F) * (1.0F  / 1023.0F);
@@ -156,7 +156,7 @@ static inline float conv_i2_to_norm_float(const struct gl_context *ctx, int i2)
        (ctx->API == API_OPENGL_CORE && ctx->Version >= 42)) {
       /* Equation 2.3 above. */
       float f = (float) val.x;
-      return MAX2(f, -1.0);
+      return MAX2(f, -1.0f);
    } else {
       /* Equation 2.2 above. */
       return (2.0F * (float)val.x + 1.0F) * (1.0F / 3.0F);
diff --git a/mesalib/src/mesa/vbo/vbo_exec_array.c b/mesalib/src/mesa/vbo/vbo_exec_array.c
index 1670409d4..f25a9dec3 100644
--- a/mesalib/src/mesa/vbo/vbo_exec_array.c
+++ b/mesalib/src/mesa/vbo/vbo_exec_array.c
@@ -1464,6 +1464,16 @@ vbo_draw_transform_feedback(struct gl_context *ctx, GLenum mode,
       return;
    }
 
+   if (ctx->Driver.GetTransformFeedbackVertexCount &&
+       (ctx->Const.AlwaysUseGetTransformFeedbackVertexCount ||
+        (ctx->Const.PrimitiveRestartInSoftware &&
+         ctx->Array._PrimitiveRestart) ||
+        !vbo_all_varyings_in_vbos(exec->array.inputs))) {
+      GLsizei n = ctx->Driver.GetTransformFeedbackVertexCount(ctx, obj, stream);
+      vbo_draw_arrays(ctx, mode, 0, n, numInstances, 0);
+      return;
+   }
+
    vbo_bind_arrays(ctx);
 
    /* init most fields to zero */