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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