https://bugs.llvm.org/show_bug.cgi?id=47425
Bug ID: 47425
Summary: return type for isnan instrinsic math function causes
problem in conditional
Product: flang
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: Frontend
Assignee: unassignedb...@nondot.org
Reporter: narom...@anl.gov
CC: david.tr...@arm.com, jper...@nvidia.com,
kirankuma...@gmail.com, llvm-bugs@lists.llvm.org,
sscalp...@nvidia.com
Created attachment 23930
--> https://bugs.llvm.org/attachment.cgi?id=23930&action=edit
conditional on return value is isnan
Assuming isnan is a standard Fortran intrinsic math function, this short
program fails to compile with Flang. It compiles successfully with PGI, ifort,
and gfortran.
[naromero@naromero-desktop bugs]$
/nfs/gce/projects/naromero-workspace/llvm-master/bin/flang -c testisnan.F
testisnan.F:6:11: error: Must have LOGICAL type, but is INTEGER(4)
if (isnan(dum)) write (*,*) 'dum is NaN'
^^^^^^^^^^
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