Viewing file:  test-nested-loops.c (5.16 KB) -rw-r--r--
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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "libgccjit.h"
#include "harness.h"
void
create_code (gcc_jit_context *ctxt, void *user_data)
{
/* Let's try to inject the equivalent of:
double
test_nested_loops (int n, double *a, double *b)
{
double result = 0.;
for (int i = 0; i < n; i++)
for (int j = 0; j < n; j++)
result += a[i] * b[j];
return result
}
*/
gcc_jit_type *val_type =
gcc_jit_context_get_type (ctxt, GCC_JIT_TYPE_DOUBLE);
gcc_jit_type *ptr_type = gcc_jit_type_get_pointer (val_type);
gcc_jit_type *int_type =
gcc_jit_context_get_type (ctxt, GCC_JIT_TYPE_INT);
gcc_jit_type *return_type = val_type;
gcc_jit_param *param_n =
gcc_jit_context_new_param (ctxt, NULL, int_type, "n");
gcc_jit_param *param_a =
gcc_jit_context_new_param (ctxt, NULL, ptr_type, "a");
gcc_jit_param *param_b =
gcc_jit_context_new_param (ctxt, NULL, ptr_type, "b");
gcc_jit_param *params[3] = {param_n, param_a, param_b};
gcc_jit_function *func =
gcc_jit_context_new_function (ctxt, NULL,
GCC_JIT_FUNCTION_EXPORTED,
return_type,
"test_nested_loops",
3, params, 0);
/* Create locals. */
gcc_jit_lvalue *result =
gcc_jit_function_new_local (func, NULL, val_type, "result");
gcc_jit_lvalue *i =
gcc_jit_function_new_local (func, NULL, int_type, "i");
gcc_jit_lvalue *j =
gcc_jit_function_new_local (func, NULL, int_type, "j");
/* Create basic blocks. */
gcc_jit_block *b_entry =
gcc_jit_function_new_block (func, "b_entry");
gcc_jit_block *b_outer_loop_cond =
gcc_jit_function_new_block (func, "b_outer_loop_cond");
gcc_jit_block *b_outer_loop_head =
gcc_jit_function_new_block (func, "b_outer_loop_head");
gcc_jit_block *b_outer_loop_tail =
gcc_jit_function_new_block (func, "b_outer_loop_tail");
gcc_jit_block *b_inner_loop_cond =
gcc_jit_function_new_block (func, "b_inner_loop_cond");
gcc_jit_block *b_inner_loop_body =
gcc_jit_function_new_block (func, "b_inner_loop_body");
gcc_jit_block *b_exit =
gcc_jit_function_new_block (func, "b_exit");
/* Populate b_entry. */
/* "result = 0.;" */
gcc_jit_block_add_assignment (
b_entry, NULL,
result,
gcc_jit_context_zero (ctxt, val_type));
/* "i = 0;" */
gcc_jit_block_add_assignment (
b_entry, NULL,
i,
gcc_jit_context_zero (ctxt, int_type));
gcc_jit_block_end_with_jump (b_entry, NULL, b_outer_loop_cond);
/* Populate b_outer_loop_cond. */
gcc_jit_block_end_with_conditional (
b_outer_loop_cond,
NULL,
/* (i < n) */
gcc_jit_context_new_comparison (
ctxt, NULL,
GCC_JIT_COMPARISON_LT,
gcc_jit_lvalue_as_rvalue (i),
gcc_jit_param_as_rvalue (param_n)),
b_outer_loop_head,
b_exit);
/* Populate b_outer_loop_head. */
/* j = 0; */
gcc_jit_block_add_assignment (
b_outer_loop_head, NULL,
j,
gcc_jit_context_zero (ctxt, int_type));
gcc_jit_block_end_with_jump (b_outer_loop_head, NULL, b_inner_loop_cond);
/* Populate b_inner_loop_cond. */
gcc_jit_block_end_with_conditional (
b_inner_loop_cond,
NULL,
/* (j < n) */
gcc_jit_context_new_comparison (
ctxt, NULL,
GCC_JIT_COMPARISON_LT,
gcc_jit_lvalue_as_rvalue (j),
gcc_jit_param_as_rvalue (param_n)),
b_inner_loop_body,
b_outer_loop_tail);
/* Populate b_inner_loop_body. */
/* "result += a[i] * b[j];" */
gcc_jit_block_add_assignment_op (
b_inner_loop_body, NULL,
result,
GCC_JIT_BINARY_OP_PLUS,
gcc_jit_context_new_binary_op (
ctxt, NULL,
GCC_JIT_BINARY_OP_MULT,
val_type,
gcc_jit_lvalue_as_rvalue (
gcc_jit_context_new_array_access(
ctxt, NULL,
gcc_jit_param_as_rvalue (param_a),
gcc_jit_lvalue_as_rvalue (i))),
gcc_jit_lvalue_as_rvalue (
gcc_jit_context_new_array_access(
ctxt, NULL,
gcc_jit_param_as_rvalue (param_b),
gcc_jit_lvalue_as_rvalue (j)))));
/* "j++" */
gcc_jit_block_add_assignment_op (
b_inner_loop_body, NULL,
j,
GCC_JIT_BINARY_OP_PLUS,
gcc_jit_context_one (ctxt, int_type));
gcc_jit_block_end_with_jump (b_inner_loop_body, NULL, b_inner_loop_cond);
/* Populate b_outer_loop_tail. */
/* "i++" */
gcc_jit_block_add_assignment_op (
b_outer_loop_tail, NULL,
i,
GCC_JIT_BINARY_OP_PLUS,
gcc_jit_context_one (ctxt, int_type));
gcc_jit_block_end_with_jump (b_outer_loop_tail, NULL, b_outer_loop_cond);
/* Populate b_exit. */
/* "return result;" */
gcc_jit_block_end_with_return (
b_exit,
NULL,
gcc_jit_lvalue_as_rvalue (result));
}
void
verify_code (gcc_jit_context *ctxt, gcc_jit_result *result)
{
typedef double (*test_nested_loops_fn_type) (int n, double *a, double *b);
CHECK_NON_NULL (result);
test_nested_loops_fn_type test_nested_loops =
(test_nested_loops_fn_type)gcc_jit_result_get_code (result,
"test_nested_loops");
CHECK_NON_NULL (test_nested_loops);
double test_a[] = {1., 2., 3., 4., 5., 6., 7., 8., 9., 10.};
double test_b[] = {5., 6., 7., 8., 9., 10., 1., 2., 3., 4.};
double val = test_nested_loops (10, test_a, test_b);
note ("test_nested_loops returned: %f", val);
CHECK_VALUE (val, 3025.0);
}
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