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  1. /**************************************************************************
  2.  *
  3.  * Copyright 2010 VMware, Inc.
  4.  * All Rights Reserved.
  5.  *
  6.  * Permission is hereby granted, free of charge, to any person obtaining a
  7.  * copy of this software and associated documentation files (the
  8.  * "Software"), to deal in the Software without restriction, including
  9.  * without limitation the rights to use, copy, modify, merge, publish,
  10.  * distribute, sub license, and/or sell copies of the Software, and to
  11.  * permit persons to whom the Software is furnished to do so, subject to
  12.  * the following conditions:
  13.  *
  14.  * The above copyright notice and this permission notice (including the
  15.  * next paragraph) shall be included in all copies or substantial portions
  16.  * of the Software.
  17.  *
  18.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19.  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20.  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21.  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  22.  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23.  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24.  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25.  *
  26.  **************************************************************************/
  27.  
  28. #include "util/u_debug.h"
  29. #include "util/u_memory.h"
  30. #include "lp_bld_assert.h"
  31. #include "lp_bld_init.h"
  32. #include "lp_bld_const.h"
  33. #include "lp_bld_printf.h"
  34.  
  35.  
  36. /**
  37.  * A call to lp_build_assert() will build a function call to this function.
  38.  */
  39. static void
  40. lp_assert(int condition, const char *msg)
  41. {
  42.    if (!condition) {
  43.       debug_printf("LLVM assertion '%s' failed!\n", msg);
  44.       assert(condition);
  45.    }
  46. }
  47.  
  48.  
  49.  
  50. /**
  51.  * lp_build_assert.
  52.  *
  53.  * Build an assertion in LLVM IR by building a function call to the
  54.  * lp_assert() function above.
  55.  *
  56.  * \param condition should be an 'i1' or 'i32' value
  57.  * \param msg  a string to print if the assertion fails.
  58.  */
  59. void
  60. lp_build_assert(struct gallivm_state *gallivm,
  61.                 LLVMValueRef condition,
  62.                 const char *msg)
  63. {
  64.    LLVMBuilderRef builder = gallivm->builder;
  65.    LLVMContextRef context = gallivm->context;
  66.    LLVMTypeRef arg_types[2];
  67.    LLVMTypeRef ret_type;
  68.    LLVMValueRef function;
  69.    LLVMValueRef args[2];
  70.    LLVMValueRef msg_string;
  71.  
  72.    msg_string = lp_build_const_string(gallivm, msg);
  73.  
  74.    ret_type = LLVMVoidTypeInContext(context);
  75.    arg_types[0] = LLVMInt32TypeInContext(context);
  76.    arg_types[1] = LLVMPointerType(LLVMInt8TypeInContext(context), 0);
  77.  
  78.    function = lp_build_const_func_pointer(gallivm,
  79.                                           func_to_pointer((func_pointer)lp_assert),
  80.                                           ret_type, arg_types, Elements(arg_types),
  81.                                           "assert");
  82.  
  83.    /* build function call param list */
  84.    args[0] = LLVMBuildZExt(builder, condition, arg_types[0], "");
  85.    args[1] = msg_string;
  86.  
  87.    /* check arg types */
  88.    assert(LLVMTypeOf(args[0]) == arg_types[0]);
  89.    assert(LLVMTypeOf(args[1]) == arg_types[1]);
  90.  
  91.    LLVMBuildCall(builder, function, args, Elements(args), "");
  92. }
  93.