[Flang] No error checking of using integer to initialize logical

[ohno-fj]

Version of flang : 20.0.0(590f451b60d434b26c634a07125fb05baf461fa0)/AArch64

Flang does not detect an error for using integer to initialize logical.
Flang and ifx do not detect errors, but Gfortran does.

The following are the test program, Flang, Gfortran and ifx compilation/execution result.

i810_22.f:

      program main
      logical b/4/
      write(6,*) "b = ", b
      end

$ flang i810_22.f; ./a.out
 b =  T
$

$ gfortran i810_22.f
i810_22.f:2:15:

    2 |       logical b/4/
      |               1
Error: Incompatible types in DATA statement at (1); attempted conversion of INTEGER(4) to LOGICAL(4)
$

$ ifx i810_22.f; ./a.out
 b =  F
$

[llvmbot]

@llvm/issue-subscribers-flang-frontend

Author: None (ohno-fj)

``` Version of flang : 20.0.0(590f451)/AArch64 ```

Flang does not detect an error for using integer to initialize logical.
Flang and ifx do not detect errors, but Gfortran does.

The following are the test program, Flang, Gfortran and ifx compilation/execution result.

i810_22.f:

      program main
      logical b/4/
      write(6,*) "b = ", b
      end

$ flang i810_22.f; ./a.out
 b =  T
$

$ gfortran i810_22.f
i810_22.f:2:15:

    2 |       logical b/4/
      |               1
Error: Incompatible types in DATA statement at (1); attempted conversion of INTEGER(4) to LOGICAL(4)
$

$ ifx i810_22.f; ./a.out
 b =  F
$

[klausler]

Use -pedantic for enhanced detection of nonstandard usage to observe:

portability: nonstandard usage: initialization of LOGICAL(4) with INTEGER(4)