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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
lp_assert(int condition,const char * msg)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
lp_build_assert(struct gallivm_state * gallivm,LLVMValueRef condition,const char * msg)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, ARRAY_SIZE(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, ARRAY_SIZE(args), "");
92 }
93