Intel/Linux Fortran Compiler Diagnostic Capabilities
Download Diagnostic test source code (diagnose.zip 17K)
| Source | Run-time Error | Absoft | g95 | gfortran | Intel | Lahey | Nag | Pathscale | PGI | Sun |
|---|---|---|---|---|---|---|---|---|---|---|
| Percentage Passes 1 | 35% | 47% | 43% | 55% | 96% | 90% | 39% | 29% | 43% | |
| TFFT execution time with diagnostic switches (seconds)2 | 14 | 16 | 8 | 9 | 521 | 12 |
8 | 88614 | 13 | |
| Can mix checked and unchecked code | Yes | Yes | Yes | Yes | No | No | Yes | Yes | Yes | |
| ARG1 | argument mismatch - same file | No | Yes3 | No | Yes4 | Yes4 | Yes4 | Yes3 | No | Yes3 |
| ARG2 | argument mismatch - different file6 | No | No | No | Yes4,11 | Yes4 | Yes5 | No | No | No |
| ARG3 | Illegal assignment to constant argument - no INTENT specified | No | No | No | Yes4,12 | Yes5 | Yes5 | No | No | No |
| ARG4 | Illegal assignment to constant argument - INTENT specified | Yes4 | Yes4 | Yes4 | Yes4 | Yes4 | Yes4 | Yes4 | Yes3 | Yes4 |
| ARG5 | Illegal assignment to DO loop variable in SUBROUTINE - no INTENT specified | No | No | No | No | Yes5 | Yes5 | No | No | No |
| ARG6 | Illegal assignment to DO loop variable in SUBROUTINE - INTENT specified | Yes4 | Yes4 | Yes4 | Yes4 | Yes4 | Yes4 | Yes4 | Yes3 | Yes4 |
| ARG7 | Scalar constant passed to array dummy argument | No | No | No | Yes4 | Yes5 | Yes5 | Yes3 | No | Yes3 |
| OARG1 | Illegal use of optional argument | No | No | No | Yes5,12 | Yes5 | Yes5 | No | No | Yes5 |
| Source | Run-time Error | Absoft | g95 | gfortran | Intel | Lahey | Nag | Pathscale | PGI | Sun |
| ALIAS1 | Aliased dummy argument variable10 | No | No | No | No | Yes5 | No | No7 | No | No |
| ALIAS2 | Aliased dummy argument array | No | No | No | No | Yes5 | No | No7 | No | No |
| BND1 | array bound error - X(100) | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 |
| BND2 | array bound error - X(N) N is argument | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 |
| BND3 | array bound error - X(N) N is in COMMON | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 |
| BND4 | array bound error - X(N) N is in MODULE | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 |
| BND5 | array bound error - X(*) | No | No | No9 | No | Yes5 | Yes5 | No | No | No |
| BND6 | array bound error - X(M:N) M and N argument - lower bound violated | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 |
| BND7 | array bound error - automatic array | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 |
| BND8 | array bound error - allocatable array | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 |
| BND9 | multi-dimensional array bound error within overall array bounds | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 |
| BND10 | array bound error - assign to dummy arg array beyond bounds of actual array | No | No | No | No | Yes5 | Yes5 | No | No | No |
| BND11 | array bound error - pointer array component of derived type | Yes5 | Yes5 | Yes5 | Yes5 | No | Yes5 | Yes5 | Yes5 | Yes5 |
| Source | Run-time Error | Absoft | g95 | gfortran | Intel | Lahey | Nag | Pathscale | PGI | Sun |
| CBND1 | character bound error - local | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | No | No | Yes5 |
| CBND2 | character bound error - COMMON | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | No | No | Yes5 |
| CBND3 | character bound error - assign to dummy which is larger than actual arg | No | No | No | Yes4 | Yes4 | Yes5 | No | No | No |
| CBND4 | character bound error - CHARACTER*(*) | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | No | No | Yes5 |
| UIN1 | uninitialized variable8 - local | No | Yes3 | Yes3 | Yes5 | Yes3,5 | Yes3,5 | Yes3 | No | No |
| UIN2 | uninitialized variable - argument | No | No | No | No | Yes3,5 | Yes5 | No | No | No |
| UIN3 | uninitialized variable - COMMON | No | No | No | No | Yes3,5 | Yes5 | No | No | No |
| UIN4 | uninitialized variable - MODULE | No | No | No | No | Yes5 | Yes5 | No | No | No |
| UIN5 | uninitialized array element - local | No | No | No | No | Yes5 | Yes5 | No | No | No |
| UIN6 | uninitialized array element - argument | No | No | No | No | Yes5 | Yes5 | No | No | No |
| UIN7 | uninitialized array element - COMMON | No | No | No | No | Yes5 | Yes5 | No | No | No |
| Source | Run-time Error | Absoft | g95 | gfortran | Intel | Lahey | Nag | Pathscale | PGI | Sun |
| UIN8 | uninitialized array element - MODULE | No | No | No | No | Yes5 | Yes5 | No | No | No |
| UIN9 | uninitialized array element - local array in SUBROUTINE | No | No | No | No | Yes3,5 | Yes5 | No | No | No |
| UIN10 | uninitialized array element - automatic arrays | No | No | No | No | Yes5 | Yes5 | No | No | No |
| UIN11 | uninitialized array element - allocatable arrays | No | No | No | No | Yes5 | Yes5 | No | No | No |
| UIN12 | uninitialized array element - saved arrays | No | No | No | No | Yes5 | Yes5 | No | No | No |
| UIN13 | uninitialized array element - INTENT(OUT) arrays | No | No | No | No | Yes5 | Yes5 | No | No | No |
| DO1 | zero increment DO loop | DIV0 | DIV05,12 | DIV05,12 | DIV05,12 | Yes5 | Yes5 | DIV0 | DIV0 | DIV0 |
| DO2 | Illegal assignment to local DO loop variable | Yes4 | Yes4 | Yes4 | Yes4 | Yes4 | Yes4 | Yes4 | Yes3 | Yes4 |
| DO3 | Illegal assignment to local DO loop variable via EQUIVALENCE | No | No | No | No | Yes3 | Yes4 | No | No | No |
| DO4 | Illegal assignment to DO variables in CONTAINed subprogram | No | Yes3 | No | No | Yes5 | No | No | No | No |
| Source | Run-time Error | Absoft | g95 | gfortran | Intel | Lahey | Nag | Pathscale | PGI | Sun |
| SF1 | SUBROUTINE referenced as a FUNCTION - same file | No | Yes4 | Yes4 | Yes4 | Yes4 | Yes4 | Yes4 | No | Yes4 |
| SF2 | SUBROUTINE referenced as a FUNCTION - different file6 | No | No | No | Yes4,11 | Yes4 | Yes5 | No | No | No |
| FH1 | Same file opened on 2 different units13 | No | Yes5 | Yes5 | No | Yes5 | No | Yes | Yes | No |
| FMT1 | Illegal run-time format | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 | Yes5 |
| CONF | Non-conformant array assignment | Yes5 | No | Yes5 | No | Yes5 | Yes5 | Yes5 | No | Yes5 |
| PTR1 | Assign via pointer after target deallocated | No | No | No | No | Yes5 | Yes5 | No | No | No |
| PTR2 | Assign via global pointer to local array after subprogram return | No | No | No | No | Yes5 | Yes5 | No | No | No |
| UFL | underflow | Option | Option | Option | Option | Option | Warning | Option | Option | Option |
| OFL | overflow | Option | Option | Option | Option | Option | Trap | Option | Option | Option |
| DIV0 | divide zero | Option | Option | Option | Option | Option | Trap | Option | Option | Option |
| IOFL | integer overflow | Silent | Silent | Silent | Silent | Silent | Silent | Silent | Silent | Silent |
| Full trace-back from run-time errors | No | Yes | Yes | Yes | Yes | Yes | No | No | No |
| Key | |
| DIV0 | Produced Divide Exception |
| Silent | No indication |
| Trap | Execution halted |
| Option | User can select Silent or Trap |
|
Compiler Switches
|
|
| Absoft | af95 -Rb -Rc -Rp -Rs -m2 -dq -trap=DIVBYZERO,OVERFLOW,UNDERFLOW -et |
|
g95
|
g95 -Wall -pedantic -fbounds-check -ftrace=full
|
| gfortran | gfortran -W -Wall -fbounds-check -pedantic-errors -std=f2003 -Wunderflow -O -fbacktrace -ffpe-trap=zero,overflow,underflow -g |
| Intel | ifort -check all -warn all,nodec,interfaces -gen_interfaces -traceback -fpe0 -fpstkchk |
| Lahey | lf95 --chkglobal -g --co --f95 --lst --trace --nsav --warn --xref |
|
NAG
|
f95 -C=all -C=undefined -info -g -gline
|
| Pathscale | pathf90 -C -Wuninitialized -fullwarn -ffortran-bounds-check -TENV:simd_omask=OFF -TENV:simd_umask=OFF -TENV:simd_zmask=OFF |
| PGI | pgf90 -g -Mbounds -Mchkstk -Mchkptr -Mchkfpstk -Minform=inform -C |
| Sun | sunf95 -ansi -w4 -xcheck=%all -C -ftrap=common,overflow,underflow |
| Notes | |
| Thanks to Herman D. Knoble and Arnaud Desitter for supplying some of the diagnostic tests. You can find more tests like these at Herman's site: //ftp.cac.psu.edu/pub/ger/fortran/test/ | |
| 1 | "Percentage Passes" is calculated from a total of 51 tests. No score is assigned for exception handling. |
| 2 | Execution Time for TFFT benchmark, compiled using the diagnostic switches (see table above) - measured on the same machine as the benchmarks. |
| 3 | Compiler issued warning message |
| 4 | Compiler issued fatal error message - no executable produced |
| 5 | Run-time message |
| 6 | Arranged so that error is not visible at compile time |
| 7 | Compiler has option to allow or disallow aliasing - a change in behaviour suggests an aliasing error. |
| 8 | A variable is "uninitialized" if it has never been assigned a value. Data elements should be initialized before their value is used. The illegal use of an uninitialized variable can sometimes be detected at compile-time, but, because it may be data and flow dependent, usually requires run-time monitoring. |
| 9 | Run time message "Array reference out of bounds" does not specify array name or line number. |
| 10 | Spotted by Forcheck |
| 11 | Compilation order dependent. Compiler generates .mod file to allow interface checking. |
| 12 | Non-specific error message, but full traceback. |
| 13 | The test is passed if the program refuses the second open. For some reason, the Fortran standard does not allow a file to be opened twice, even for read-only access. It has been argued to me that allowing the second open is an extension to the standard, rather than a failure to spot an error. |
| 14 | Much faster without -Mchkfpstk. |