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[flang] Address complaints in bug flang-compiler/f18#912 

Original-commit: flang-compiler/f18@829f5647d6
Reviewed-on: https://github.com/flang-compiler/f18/pull/917
This commit is contained in:
peter klausler 2020-01-09 09:39:09 -08:00
parent 866ab07837
commit e6ab4a7869
1 changed files with 10 additions and 9 deletions
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19
flang/documentation/Extensions.md
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@ -115,15 +115,6 @@ Extensions, deletions, and legacy features supported by default
allowed. The values are normalized.
* An effectively empty source file (no program unit) is accepted and
produces an empty relocatable output file.
* The default `INTEGER` type is required by the standard to occupy
the same amount of storage as the default `REAL` type. Default
`REAL` is of course 32-bit IEEE-754 floating-point today. This legacy
rule imposes an artificially small constraint in some cases
where Fortran mandates that something have the default `INTEGER`
type: specifically, the results of references to the intrinsic functions
`SIZE`, `LBOUND`, `UBOUND`, `SHAPE`, and the location reductions
`FINDLOC`, `MAXLOC`, and `MINLOC`. We return `INTEGER(KIND=8)` by
default in these cases when the `-flarge-sizes` option is enabled.
Extensions supported when enabled by options
--------------------------------------------
@ -132,6 +123,16 @@ Extensions supported when enabled by options
* Logical abbreviations `.T.`, `.F.`, `.N.`, `.A.`, `.O.`, and `.X.`
[-flogical-abbreviations]
* `.XOR.` as a synonym for `.NEQV.` [-fxor-operator]
* The default `INTEGER` type is required by the standard to occupy
the same amount of storage as the default `REAL` type. Default
`REAL` is of course 32-bit IEEE-754 floating-point today. This legacy
rule imposes an artificially small constraint in some cases
where Fortran mandates that something have the default `INTEGER`
type: specifically, the results of references to the intrinsic functions
`SIZE`, `LBOUND`, `UBOUND`, `SHAPE`, and the location reductions
`FINDLOC`, `MAXLOC`, and `MINLOC` in the absence of an explicit
`KIND=` actual argument. We return `INTEGER(KIND=8)` by default in
these cases when the `-flarge-sizes` option is enabled.
Extensions and legacy features deliberately not supported
---------------------------------------------------------