/**
* 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;
}
/**
* lp_build_printf.
*
* Build printf call in LLVM IR. The output goes to stdout.
* The additional variable arguments need to have type
* LLVMValueRef.
*/
LLVMValueRef
lp_build_printf(struct gallivm_state *gallivm, const char *fmt, ...)
{
va_list arglist;
int i = 0;
int argcount = lp_get_printf_arg_count(fmt);
LLVMBuilderRef builder = gallivm->builder;
LLVMContextRef context = gallivm->context;
LLVMModuleRef module = gallivm->module;
LLVMValueRef params[50];
LLVMValueRef fmtarg = lp_build_const_string_variable(module, context,
fmt, strlen(fmt) + 1);
LLVMValueRef int0 = lp_build_const_int32(gallivm, 0);
LLVMValueRef index[2];
LLVMValueRef func_printf = LLVMGetNamedFunction(module, "printf");
assert(Elements(params) >= argcount + 1);
index[0] = index[1] = int0;
if (!func_printf) {
LLVMTypeRef printf_type = LLVMFunctionType(LLVMIntTypeInContext(context, 32), NULL, 0, 1);
func_printf = LLVMAddFunction(module, "printf", printf_type);
}
params[0] = LLVMBuildGEP(builder, fmtarg, index, 2, "");
va_start(arglist, fmt);
for (i = 1; i <= argcount; i++) {
LLVMValueRef val = va_arg(arglist, LLVMValueRef);
LLVMTypeRef type = LLVMTypeOf(val);
/* printf wants doubles, so lets convert so that
* we can actually print them */
if (LLVMGetTypeKind(type) == LLVMFloatTypeKind)
val = LLVMBuildFPExt(builder, val, LLVMDoubleTypeInContext(context), "");
params[i] = val;
}
va_end(arglist);
return LLVMBuildCall(builder, func_printf, params, argcount + 1, "");
}
