src/gallium/auxiliary/gallivm/lp_bld_assert.c

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   3  * Copyright 2010 VMware, Inc.
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  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
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  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 }