gallivm: added lp_build_assert() function to make assertions in LLVM code

src/gallium/auxiliary/Makefile

@@ -149,6 +149,7 @@ C_SOURCES = \
 
 GALLIVM_SOURCES = \
         gallivm/lp_bld_arit.c \
+        gallivm/lp_bld_assert.c \
         gallivm/lp_bld_const.c \
         gallivm/lp_bld_conv.c \
         gallivm/lp_bld_debug.c \

src/gallium/auxiliary/SConscript

@@ -198,6 +198,7 @@ source = [
 if env['llvm']:
     source += [
     'gallivm/lp_bld_arit.c',
+    'gallivm/lp_bld_assert.c',
     'gallivm/lp_bld_const.c',
     'gallivm/lp_bld_conv.c',
     'gallivm/lp_bld_debug.c',

src/gallium/auxiliary/gallivm/lp_bld_assert.c

@@ -0,0 +1,101 @@
+/**************************************************************************
+ *
+ * Copyright 2010 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.
+ *
+ **************************************************************************/
+
+#include "util/u_debug.h"
+#include "util/u_memory.h"
+#include "lp_bld_assert.h"
+#include "lp_bld_init.h"
+#include "lp_bld_printf.h"
+
+
+/**
+ * A call to lp_build_assert() will build a function call to this function.
+ */
+static void
+lp_assert(int condition, const char *msg)
+{
+   if (!condition) {
+      debug_printf("LLVM assertion '%s' failed!\n", msg);
+      assert(condition);
+   }
+}
+
+
+
+/**
+ * lp_build_assert.
+ *
+ * Build an assertion in LLVM IR by building a function call to the
+ * lp_assert() function above.
+ *
+ * \param condition should be an 'i1' or 'i32' value
+ * \param msg  a string to print if the assertion fails.
+ */
+LLVMValueRef
+lp_build_assert(LLVMBuilderRef builder, LLVMValueRef condition,
+                const char *msg)
+{
+   LLVMModuleRef module;
+   LLVMTypeRef arg_types[2];
+   LLVMValueRef msg_string, assert_func, params[2], r;
+
+   module = LLVMGetGlobalParent(LLVMGetBasicBlockParent(
+                            LLVMGetInsertBlock(builder)));
+
+   msg_string = lp_build_const_string_variable(module, msg, strlen(msg) + 1);
+
+   arg_types[0] = LLVMInt32Type();
+   arg_types[1] = LLVMPointerType(LLVMInt8Type(), 0);
+
+   /* lookup the lp_assert function */
+   assert_func = LLVMGetNamedFunction(module, "lp_assert");
+
+   /* Create the assertion function if not found */
+   if (!assert_func) {
+      LLVMTypeRef func_type =
+         LLVMFunctionType(LLVMVoidType(), arg_types, 2, 0);
+
+      assert_func = LLVMAddFunction(module, "lp_assert", func_type);
+      LLVMSetFunctionCallConv(assert_func, LLVMCCallConv);
+      LLVMSetLinkage(assert_func, LLVMExternalLinkage);
+      LLVMAddGlobalMapping(lp_build_engine, assert_func,
+                           func_to_pointer((func_pointer)lp_assert));
+   }
+   assert(assert_func);
+
+   /* build function call param list */
+   params[0] = LLVMBuildZExt(builder, condition, arg_types[0], "");
+   params[1] = LLVMBuildBitCast(builder, msg_string, arg_types[1], "");
+
+   /* check arg types */
+   assert(LLVMTypeOf(params[0]) == arg_types[0]);
+   assert(LLVMTypeOf(params[1]) == arg_types[1]);
+
+   r = LLVMBuildCall(builder, assert_func, params, 2, "");
+
+   return r;
+}

src/gallium/auxiliary/gallivm/lp_bld_assert.h

@@ -0,0 +1,41 @@
+/**************************************************************************
+ *
+ * Copyright 2010 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.
+ *
+ **************************************************************************/
+
+#ifndef LP_BLD_ASSERT_H
+#define LP_BLD_ASSERT_H
+
+
+#include "lp_bld.h"
+
+
+LLVMValueRef
+lp_build_assert(LLVMBuilderRef builder, LLVMValueRef condition,
+                const char *msg);
+
+
+#endif
+