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[Ada] Add/fix documentation for the Double_*_Alignment parameters 

2019-08-13  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

	* doc/gnat_ugn/building_executable_programs_with_gnat.rst
	(-gnateT): Document Double_Float_Alignment parameter and fix
	description of Double_Scalar_Alignment parameter.
	* gnat_ugn.texi: Regenerate.

From-SVN: r274337
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Eric Botcazou 2019-08-13 08:06:44 +00:00 committed by Pierre-Marie de Rodat
parent d71e9fb2a5
commit 114042b886
3 changed files with 20 additions and 9 deletions
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7
gcc/ada/ChangeLog
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@ -1,3 +1,10 @@
2019-08-13 Eric Botcazou <ebotcazou@adacore.com>
* doc/gnat_ugn/building_executable_programs_with_gnat.rst
(-gnateT): Document Double_Float_Alignment parameter and fix
description of Double_Scalar_Alignment parameter.
* gnat_ugn.texi: Regenerate.
2019-08-13 Eric Botcazou <ebotcazou@adacore.com>
* exp_ch6.adb (Expand_Call_Helper): If back-end inlining is

10
gcc/ada/doc/gnat_ugn/building_executable_programs_with_gnat.rst
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@ -1714,11 +1714,13 @@ Alphabetical List of All Switches
GCC macro ``BITS_PER_WORD`` documented as follows: `Number of bits in a word;
normally 32.`
``Double_Scalar_Alignment`` is the alignment for a scalar whose size is two
machine words. It should be the same as the alignment for C ``long_long`` on
most targets.
``Double_Float_Alignment``, if not zero, is the maximum alignment that the
compiler can choose by default for a 64-bit floating-point type or object.
``Maximum_Alignment`` is the maximum alignment that the compiler might choose
``Double_Scalar_Alignment``, if not zero, is the maximum alignment that the
compiler can choose by default for a 64-bit or larger scalar type or object.
``Maximum_Alignment`` is the maximum alignment that the compiler can choose
by default for a type or object, which is also the maximum alignment that can
be specified in GNAT. It is computed for GCC backends as ``BIGGEST_ALIGNMENT
/ BITS_PER_UNIT`` where GCC macro ``BIGGEST_ALIGNMENT`` is documented as

12
gcc/ada/gnat_ugn.texi
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@ -21,7 +21,7 @@
@copying
@quotation
GNAT User's Guide for Native Platforms , Jun 21, 2019
GNAT User's Guide for Native Platforms , Jul 31, 2019
AdaCore
@ -9452,11 +9452,13 @@ GCC macro @code{BITS_PER_UNIT} documented as follows: @cite{Define this macro to
@code{Bits_Per_Word} is the number of bits in a machine word, the equivalent of
GCC macro @code{BITS_PER_WORD} documented as follows: @cite{Number of bits in a word; normally 32.}
@code{Double_Scalar_Alignment} is the alignment for a scalar whose size is two
machine words. It should be the same as the alignment for C @code{long_long} on
most targets.
@code{Double_Float_Alignment}, if not zero, is the maximum alignment that the
compiler can choose by default for a 64-bit floating-point type or object.
@code{Maximum_Alignment} is the maximum alignment that the compiler might choose
@code{Double_Scalar_Alignment}, if not zero, is the maximum alignment that the
compiler can choose by default for a 64-bit or larger scalar type or object.
@code{Maximum_Alignment} is the maximum alignment that the compiler can choose
by default for a type or object, which is also the maximum alignment that can
be specified in GNAT. It is computed for GCC backends as @code{BIGGEST_ALIGNMENT
/ BITS_PER_UNIT} where GCC macro @code{BIGGEST_ALIGNMENT} is documented as