[Mesa-dev] [PATCH 05/19] glsl: Add tracking for elements of an array-of-arrays that have been accessed
Ian Romanick
idr at freedesktop.org
Fri Dec 16 04:10:17 UTC 2016
From: Ian Romanick <ian.d.romanick at intel.com>
If there's a better way to provide access to ir_array_refcount_entry
private members to the test functions, I am very interested to know
about it.
Signed-off-by: Ian Romanick <ian.d.romanick at intel.com>
Cc: Francisco Jerez <currojerez at riseup.net>
Cc: mesa-stable at lists.freedesktop.org
---
src/compiler/Makefile.glsl.am | 1 +
src/compiler/glsl/ir_array_refcount.cpp | 10 +-
src/compiler/glsl/ir_array_refcount.h | 24 ++++
src/compiler/glsl/tests/array_refcount_test.cpp | 143 ++++++++++++++++++++++++
4 files changed, 177 insertions(+), 1 deletion(-)
create mode 100644 src/compiler/glsl/tests/array_refcount_test.cpp
diff --git a/src/compiler/Makefile.glsl.am b/src/compiler/Makefile.glsl.am
index 5b1d74e..5520aca 100644
--- a/src/compiler/Makefile.glsl.am
+++ b/src/compiler/Makefile.glsl.am
@@ -69,6 +69,7 @@ glsl_tests_cache_test_LDADD = \
$(PTHREAD_LIBS)
glsl_tests_general_ir_test_SOURCES = \
+ glsl/tests/array_refcount_test.cpp \
glsl/tests/builtin_variable_test.cpp \
glsl/tests/invalidate_locations_test.cpp \
glsl/tests/general_ir_test.cpp \
diff --git a/src/compiler/glsl/ir_array_refcount.cpp b/src/compiler/glsl/ir_array_refcount.cpp
index 41a0914..fd831a8 100644
--- a/src/compiler/glsl/ir_array_refcount.cpp
+++ b/src/compiler/glsl/ir_array_refcount.cpp
@@ -56,7 +56,15 @@ ir_array_refcount_visitor::~ir_array_refcount_visitor()
ir_array_refcount_entry::ir_array_refcount_entry(ir_variable *var)
: var(var), is_referenced(false)
{
- /* empty */
+ num_bits = MAX2(1, var->type->arrays_of_arrays_size());
+ bits = new BITSET_WORD[BITSET_WORDS(num_bits)];
+ memset(bits, 0, BITSET_WORDS(num_bits) * sizeof(bits[0]));
+}
+
+
+ir_array_refcount_entry::~ir_array_refcount_entry()
+{
+ delete [] bits;
}
diff --git a/src/compiler/glsl/ir_array_refcount.h b/src/compiler/glsl/ir_array_refcount.h
index 9ec46d2..4296e4b 100644
--- a/src/compiler/glsl/ir_array_refcount.h
+++ b/src/compiler/glsl/ir_array_refcount.h
@@ -30,16 +30,40 @@
#include "ir.h"
#include "ir_visitor.h"
#include "compiler/glsl_types.h"
+#include "util/bitset.h"
class ir_array_refcount_entry
{
public:
ir_array_refcount_entry(ir_variable *var);
+ ~ir_array_refcount_entry();
ir_variable *var; /* The key: the variable's pointer. */
/** Has the variable been referenced? */
bool is_referenced;
+
+ /** Has a linearized array index been referenced? */
+ bool is_linearized_index_referenced(unsigned linearized_index) const
+ {
+ assert(bits != 0);
+ assert(linearized_index <= num_bits);
+
+ return BITSET_TEST(bits, linearized_index);
+ }
+
+private:
+ /** Set of bit-flags to note which array elements have been accessed. */
+ BITSET_WORD *bits;
+
+ /**
+ * Total number of bits referenced by \c bits.
+ *
+ * Also the total number of array(s-of-arrays) elements of \c var.
+ */
+ unsigned num_bits;
+
+ friend class array_refcount_test;
};
class ir_array_refcount_visitor : public ir_hierarchical_visitor {
diff --git a/src/compiler/glsl/tests/array_refcount_test.cpp b/src/compiler/glsl/tests/array_refcount_test.cpp
new file mode 100644
index 0000000..d80ea81
--- /dev/null
+++ b/src/compiler/glsl/tests/array_refcount_test.cpp
@@ -0,0 +1,143 @@
+/*
+ * Copyright © 2016 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.
+ */
+#include <gtest/gtest.h>
+#include "ir.h"
+#include "ir_array_refcount.h"
+
+class array_refcount_test : public ::testing::Test {
+public:
+ virtual void SetUp();
+ virtual void TearDown();
+
+ void *mem_ctx;
+
+ /**
+ * glsl_type for a vec4[3][4][5].
+ *
+ * The exceptionally verbose name is picked because it matches the syntax
+ * of http://cdecl.org/.
+ */
+ const glsl_type *array_3_of_array_4_of_array_5_of_vec4;
+
+ /**
+ * Wrapper to access private member "bits" of ir_array_refcount_entry
+ *
+ * The test class is a friend to ir_array_refcount_entry, but the
+ * individual tests are not part of the class. Since the friendliness of
+ * the test class does not extend to the tests, provide a wrapper.
+ */
+ const BITSET_WORD *get_bits(const ir_array_refcount_entry &entry)
+ {
+ return entry.bits;
+ }
+
+ /**
+ * Wrapper to access private member "num_bits" of ir_array_refcount_entry
+ *
+ * The test class is a friend to ir_array_refcount_entry, but the
+ * individual tests are not part of the class. Since the friendliness of
+ * the test class does not extend to the tests, provide a wrapper.
+ */
+ unsigned get_num_bits(const ir_array_refcount_entry &entry)
+ {
+ return entry.num_bits;
+ }
+};
+
+void
+array_refcount_test::SetUp()
+{
+ mem_ctx = ralloc_context(NULL);
+
+ /* The type of vec4 x[3][4][5]; */
+ const glsl_type *const array_5_of_vec4 =
+ glsl_type::get_array_instance(glsl_type::vec4_type, 5);
+ const glsl_type *const array_4_of_array_5_of_vec4 =
+ glsl_type::get_array_instance(array_5_of_vec4, 4);
+ array_3_of_array_4_of_array_5_of_vec4 =
+ glsl_type::get_array_instance(array_4_of_array_5_of_vec4, 3);
+}
+
+void
+array_refcount_test::TearDown()
+{
+ ralloc_free(mem_ctx);
+ mem_ctx = NULL;
+}
+
+TEST_F(array_refcount_test, ir_array_refcount_entry_initial_state_for_scalar)
+{
+ ir_variable *const var =
+ new(mem_ctx) ir_variable(glsl_type::int_type, "a", ir_var_auto);
+
+ ir_array_refcount_entry entry(var);
+
+ ASSERT_NE((void *)0, get_bits(entry));
+ EXPECT_FALSE(entry.is_referenced);
+ EXPECT_EQ(1, get_num_bits(entry));
+ EXPECT_FALSE(entry.is_linearized_index_referenced(0));
+}
+
+TEST_F(array_refcount_test, ir_array_refcount_entry_initial_state_for_vector)
+{
+ ir_variable *const var =
+ new(mem_ctx) ir_variable(glsl_type::vec4_type, "a", ir_var_auto);
+
+ ir_array_refcount_entry entry(var);
+
+ ASSERT_NE((void *)0, get_bits(entry));
+ EXPECT_FALSE(entry.is_referenced);
+ EXPECT_EQ(1, get_num_bits(entry));
+ EXPECT_FALSE(entry.is_linearized_index_referenced(0));
+}
+
+TEST_F(array_refcount_test, ir_array_refcount_entry_initial_state_for_matrix)
+{
+ ir_variable *const var =
+ new(mem_ctx) ir_variable(glsl_type::mat4_type, "a", ir_var_auto);
+
+ ir_array_refcount_entry entry(var);
+
+ ASSERT_NE((void *)0, get_bits(entry));
+ EXPECT_FALSE(entry.is_referenced);
+ EXPECT_EQ(1, get_num_bits(entry));
+ EXPECT_FALSE(entry.is_linearized_index_referenced(0));
+}
+
+TEST_F(array_refcount_test, ir_array_refcount_entry_initial_state_for_array)
+{
+ ir_variable *const var =
+ new(mem_ctx) ir_variable(array_3_of_array_4_of_array_5_of_vec4,
+ "a",
+ ir_var_auto);
+ const unsigned total_elements = var->type->arrays_of_arrays_size();
+
+ ir_array_refcount_entry entry(var);
+
+ ASSERT_NE((void *)0, get_bits(entry));
+ EXPECT_FALSE(entry.is_referenced);
+ EXPECT_EQ(total_elements, get_num_bits(entry));
+
+ for (unsigned i = 0; i < total_elements; i++)
+ EXPECT_FALSE(entry.is_linearized_index_referenced(i)) << "index = " << i;
+}
--
2.7.4
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