[Mesa-dev] [PATCH v4 16/17] glsl linker: compare interface blocks during intrastage linking

Jordan Justen jordan.l.justen at intel.com
Thu May 16 17:44:55 PDT 2013


Verify that interface blocks match when combining compilation
units at the same stage. (For example, when merging all vertex
shaders.)

Fixes piglit glsl-1.50 test:
* linker/interface-blocks-multiple-vs-member-count-mismatch.shader_test

Signed-off-by: Jordan Justen <jordan.l.justen at intel.com>
---
 src/glsl/Makefile.sources     |    1 +
 src/glsl/interface_blocks.cpp |   86 +++++++++++++++++++++++++++++++++++++++++
 src/glsl/interface_blocks.h   |   32 +++++++++++++++
 src/glsl/linker.cpp           |    7 ++++
 4 files changed, 126 insertions(+)
 create mode 100644 src/glsl/interface_blocks.cpp
 create mode 100644 src/glsl/interface_blocks.h

diff --git a/src/glsl/Makefile.sources b/src/glsl/Makefile.sources
index b9fd283..e39cb1a 100644
--- a/src/glsl/Makefile.sources
+++ b/src/glsl/Makefile.sources
@@ -26,6 +26,7 @@ LIBGLSL_FILES = \
 	$(GLSL_SRCDIR)/glsl_types.cpp \
 	$(GLSL_SRCDIR)/glsl_symbol_table.cpp \
 	$(GLSL_SRCDIR)/hir_field_selection.cpp \
+	$(GLSL_SRCDIR)/interface_blocks.cpp \
 	$(GLSL_SRCDIR)/ir_basic_block.cpp \
 	$(GLSL_SRCDIR)/ir_builder.cpp \
 	$(GLSL_SRCDIR)/ir_clone.cpp \
diff --git a/src/glsl/interface_blocks.cpp b/src/glsl/interface_blocks.cpp
new file mode 100644
index 0000000..6dfd0c4
--- /dev/null
+++ b/src/glsl/interface_blocks.cpp
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 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 interface_blocks.cpp
+ * GLSL interface blocks support
+ */
+
+#include "ir.h"
+#include "glsl_symbol_table.h"
+#include "main/macros.h"
+#include "program/hash_table.h"
+
+static bool
+cross_validate_interface_blocks(const gl_shader **shader_list,
+                                unsigned num_shaders)
+{
+   bool ok = true;
+   glsl_symbol_table interfaces;
+
+   for (unsigned int i = 0; ok && i < num_shaders; i++) {
+      if (shader_list[i] == NULL)
+         continue;
+
+      foreach_list(node, shader_list[i]->ir) {
+         ir_variable *var = ((ir_instruction *) node)->as_variable();
+         if (!var)
+            continue;
+
+         const glsl_type *iface_type = var->interface_type;
+
+         if (iface_type == NULL)
+            continue;
+
+         const char *iface_name = iface_type->name;
+
+         const glsl_type *old_iface_type =
+            interfaces.get_interface(iface_name,
+                                     (enum ir_variable_mode) var->mode);
+
+         /* This is the first time we've seen the interface, so save
+          * it into our symbol table.
+          */
+         if (old_iface_type == NULL) {
+            interfaces.add_interface(iface_name, iface_type,
+                                     (enum ir_variable_mode) var->mode);
+            old_iface_type = iface_type;
+         }
+
+         ok &= old_iface_type == iface_type;
+         if (!ok)
+            break;
+      }
+   }
+
+   return ok;
+}
+
+bool
+validate_intrastage_interface_blocks(const gl_shader **shader_list,
+                                     unsigned num_shaders)
+{
+   return cross_validate_interface_blocks(shader_list,
+                                          num_shaders);
+}
+
diff --git a/src/glsl/interface_blocks.h b/src/glsl/interface_blocks.h
new file mode 100644
index 0000000..4c37c02
--- /dev/null
+++ b/src/glsl/interface_blocks.h
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 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.
+ */
+
+#pragma once
+#ifndef GLSL_INTERFACE_BLOCKS_H
+#define GLSL_INTERFACE_BLOCKS_H
+
+bool
+validate_intrastage_interface_blocks(const gl_shader **shader_list,
+                                     unsigned num_shaders);
+
+#endif /* GLSL_INTERFACE_BLOCKS_H */
diff --git a/src/glsl/linker.cpp b/src/glsl/linker.cpp
index c8d430c..4f2cab2 100644
--- a/src/glsl/linker.cpp
+++ b/src/glsl/linker.cpp
@@ -66,6 +66,7 @@
 
 #include "main/core.h"
 #include "glsl_symbol_table.h"
+#include "interface_blocks.h"
 #include "ir.h"
 #include "program.h"
 #include "program/hash_table.h"
@@ -938,6 +939,12 @@ link_intrastage_shaders(void *mem_ctx,
    if (!cross_validate_globals(prog, shader_list, num_shaders, false))
       return NULL;
 
+   /* Check that interface blocks defined in multiple shaders are consistent.
+    */
+   if (!validate_intrastage_interface_blocks((const gl_shader **)shader_list,
+                                             num_shaders))
+      return NULL;
+
    /* Check that uniform blocks between shaders for a stage agree. */
    const int num_uniform_blocks =
       link_uniform_blocks(mem_ctx, prog, shader_list, num_shaders,
-- 
1.7.10.4



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