File: no-int-to-ptr.cpp

package info (click to toggle)
llvm-toolchain-15 1%3A15.0.6-4
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,554,644 kB
  • sloc: cpp: 5,922,452; ansic: 1,012,136; asm: 674,362; python: 191,568; objc: 73,855; f90: 42,327; lisp: 31,913; pascal: 11,973; javascript: 10,144; sh: 9,421; perl: 7,447; ml: 5,527; awk: 3,523; makefile: 2,520; xml: 885; cs: 573; fortran: 567
file content (22 lines) | stat: -rw-r--r-- 850 bytes parent folder | download | duplicates (19) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
 
// RUN: %check_clang_tidy %s performance-no-int-to-ptr %t

// can't implicitly cast int to a pointer.
// can't use static_cast<>() to cast integer to a pointer.
// can't use dynamic_cast<>() to cast integer to a pointer.
// can't use const_cast<>() to cast integer to a pointer.

void *t0(long long int x) {
  return (void *)x;
  // CHECK-MESSAGES: [[@LINE-1]]:10: warning: integer to pointer cast pessimizes optimization opportunities [performance-no-int-to-ptr]
}

void *t1(int x) {
  return reinterpret_cast<void *>(x);
  // CHECK-MESSAGES: [[@LINE-1]]:10: warning: integer to pointer cast pessimizes optimization opportunities [performance-no-int-to-ptr]
}

// Don't diagnose casts from integer literals.
// It's a widely-used technique in embedded/microcontroller/hardware interfacing.
void *t3(long long int x) {
  return (void *)0xFEEDFACE;
}