/**
* 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, "");
}
/**
* Generate LLVM IR for a c style printf
*/
LLVMValueRef
lp_build_printf(struct gallivm_state *gallivm,
const char *fmt, ...)
{
LLVMValueRef params[50];
va_list arglist;
int argcount;
int i;
argcount = lp_get_printf_arg_count(fmt);
assert(Elements(params) >= argcount + 1);
va_start(arglist, fmt);
for (i = 1; i <= argcount; i++) {
params[i] = va_arg(arglist, LLVMValueRef);
}
va_end(arglist);
params[0] = lp_build_const_string(gallivm, fmt);
return lp_build_print_args(gallivm, argcount + 1, params);
}
