[llvm-bugs] [Bug 51889] New: error: comparison of distinct pointer types ('int *' and 'int * __ptr32')

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=51889

            Bug ID: 51889
           Summary: error: comparison of distinct pointer types ('int *'
                    and 'int * __ptr32')
           Product: clang
           Version: 12.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Frontend
          Assignee: akhuang at google.com
          Reporter: ararmine2 at gmail.com
                CC: llvm-bugs at lists.llvm.org, neeilans at live.com,
                    richard-llvm at metafoo.co.uk

1. cat test.cpp 

extern "C"
int printf(const char *,...);

int* b = (int*)-1;

int main()
{   
  if (b == (int * __ptr32) -1)
    printf("values are the same\n");
  else
    printf("values are different\n");
}

2. clang -fsyntax-only -target x86_64-windows-msvc -fms-extensions test.cpp

test.cpp:8:9: error: comparison of distinct pointer types ('int *' and 'int *
__ptr32')
  if (b == (int * __ptr32) -1)
      ~ ^  ~~~~~~~~~~~~~~~~~~
1 error generated.

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