[mlir][CAPI][test] Change casts and fprintf format strings from long …

…to intptr_t

A test in ir.c makes use of casting a void* to an integer type to print it's address. This cast is currently done with the datatype `long` however, which is only guaranteed to be equal to the pointer width on LP64 system. Other platforms may use a length not equal to the pointer width. 64bit Windows as an example uses 32 bit for `long` which does not match the 64 bit pointers.
This also results in clang warning due to `-Wvoid-pointer-to-int-cast`.

Technically speaking, since the test only passes the value 42, it does not cause any issues, but it'd be nice to fix the warning at least.

Differential Revision: https://reviews.llvm.org/D103085

mlir/test/CAPI/ir.c

@@ -21,6 +21,7 @@
 #include "mlir-c/Registration.h"
 
 #include <assert.h>
+#include <inttypes.h>
 #include <math.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -1597,7 +1598,7 @@ int testOperands() {
 
   // Test operand APIs.
   intptr_t numOperands = mlirOperationGetNumOperands(op);
-  fprintf(stderr, "Num Operands: %ld\n", numOperands);
+  fprintf(stderr, "Num Operands: %" PRIdPTR "\n", numOperands);
   // CHECK: Num Operands: 1
 
   MlirValue opOperand = mlirOperationGetOperand(op, 0);
@@ -1653,19 +1654,22 @@ int testClone() {
 
 // Wraps a diagnostic into additional text we can match against.
 MlirLogicalResult errorHandler(MlirDiagnostic diagnostic, void *userData) {
-  fprintf(stderr, "processing diagnostic (userData: %ld) <<\n", (long)userData);
+  fprintf(stderr, "processing diagnostic (userData: %" PRIdPTR ") <<\n",
+          (intptr_t)userData);
   mlirDiagnosticPrint(diagnostic, printToStderr, NULL);
   fprintf(stderr, "\n");
   MlirLocation loc = mlirDiagnosticGetLocation(diagnostic);
   mlirLocationPrint(loc, printToStderr, NULL);
   assert(mlirDiagnosticGetNumNotes(diagnostic) == 0);
-  fprintf(stderr, "\n>> end of diagnostic (userData: %ld)\n", (long)userData);
+  fprintf(stderr, "\n>> end of diagnostic (userData: %" PRIdPTR ")\n",
+          (intptr_t)userData);
   return mlirLogicalResultSuccess();
 }
 
 // Logs when the delete user data callback is called
 static void deleteUserData(void *userData) {
-  fprintf(stderr, "deleting user data (userData: %ld)\n", (long)userData);
+  fprintf(stderr, "deleting user data (userData: %" PRIdPTR ")\n",
+          (intptr_t)userData);
 }
 
 void testDiagnostics() {