bench: refactor to use dynamic memory allocation in blas/ext/base/snansumpw

PR-URL: #9314
Ref: #8643
Co-authored-by: Athan Reines <[email protected]>
Reviewed-by: Athan Reines <[email protected]>

Author: ROKUMATE

lib/node_modules/@stdlib/blas/ext/base/snansumpw/benchmark/c/benchmark.length.c

@@ -96,11 +96,12 @@ static float rand_float( void ) {
 */
 static double benchmark1( int iterations, int len ) {
 	double elapsed;
-	float x[ len ];
+	float *x;
 	float v;
 	double t;
 	int i;
 
+	x = (float *)malloc( len * sizeof( float ) );
 	for ( i = 0; i < len; i++ ) {
 		if ( rand_float() < 0.2f ) {
 			x[ i ] = 0.0f / 0.0f; // NaN
@@ -122,6 +123,7 @@ static double benchmark1( int iterations, int len ) {
 	if ( v != v ) {
 		printf( "should not return NaN\n" );
 	}
+	free( x );
 	return elapsed;
 }
 
@@ -134,11 +136,12 @@ static double benchmark1( int iterations, int len ) {
 */
 static double benchmark2( int iterations, int len ) {
 	double elapsed;
-	float x[ len ];
+	float *x;
 	float v;
 	double t;
 	int i;
 
+	x = (float *)malloc( len * sizeof( float ) );
 	for ( i = 0; i < len; i++ ) {
 		if ( rand_float() < 0.2f ) {
 			x[ i ] = 0.0f / 0.0f; // NaN
@@ -160,6 +163,7 @@ static double benchmark2( int iterations, int len ) {
 	if ( v != v ) {
 		printf( "should not return NaN\n" );
 	}
+	free( x );
 	return elapsed;
 }