diff options
| author | Thomas Koenig <tkoenig@gcc.gnu.org> | 2011-03-21 07:14:42 +0000 |
|---|---|---|
| committer | Thomas Koenig <tkoenig@gcc.gnu.org> | 2011-03-21 07:14:42 +0000 |
| commit | 2757d5ecfc14883087e062b169e8355f8cc74b19 (patch) | |
| tree | e7fa9989715e0c8733622fdf2e9e11eb709cdcb1 /gcc/fortran/invoke.texi | |
| parent | 14a41392aab6bc963db2b4248b16aa2b5af09aa5 (diff) | |
| download | gcc-2757d5ecfc14883087e062b169e8355f8cc74b19.zip gcc-2757d5ecfc14883087e062b169e8355f8cc74b19.tar.gz gcc-2757d5ecfc14883087e062b169e8355f8cc74b19.tar.bz2 | |
re PR fortran/22572 (Double occurrence of matmul intrinsic not optimised)
2010-03-21 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/22572
* gfortran.h (gfc_option_t) : Add
flag_aggressive_function_elimination.
(gfc_dep_compare_functions): Add prototype.
* lang.opt: Add faggressive-function-elimination.
* invoke.texi: Document -faggressive-function-elimination.
* frontend_passes (expr_array): New static variable.
(expr_size): Likewise.
(expr_count): Likewise.
(current_code): Likewise.
(current_ns): Likewise.
(gfc_run_passes): Allocate and free space for expressions.
(cfe_register_funcs): New function.
(create_var): New function.
(cfc_expr_0): New function.
(cfe_code): New function.
(optimize_namespace): Invoke gfc_code_walker with cfe_code
and cfe_expr_0.
* dependency.c (gfc_dep_compare_functions): New function.
(gfc_dep_compare_expr): Use it.
* options.c (gfc_init_options): Handle
flag_aggressive_function_elimination.
(gfc_handle_option): Likewise.
2010-03-21 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/22572
* gfortran.dg/function_optimize_1.f90: New test.
* gfortran.dg/function_optimize_2.f90: New test.
From-SVN: r171207
Diffstat (limited to 'gcc/fortran/invoke.texi')
| -rw-r--r-- | gcc/fortran/invoke.texi | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/gcc/fortran/invoke.texi b/gcc/fortran/invoke.texi index 22245c9..d7388d0 100644 --- a/gcc/fortran/invoke.texi +++ b/gcc/fortran/invoke.texi @@ -1468,6 +1468,18 @@ need to be in effect. An allocatable left-hand side of an intrinsic assignment is automatically (re)allocated if it is either unallocated or has a different shape. The option is enabled by default except when @option{-std=f95} is given. + +@item -faggressive-function-elimination +@opindex @code{faggressive-function-elimination} +@cindex Elimination of functions with identical argument lists +Functions with identical argument lists are eliminated within +statements, regardless of whether these functions are marked +@code{PURE} or not. For example, in +@smallexample + a = f(b,c) + f(b,c) +@end smallexample +there will only be a single call to @code{f}. + @end table @xref{Code Gen Options,,Options for Code Generation Conventions, @@ -1475,7 +1487,6 @@ gcc,Using the GNU Compiler Collection (GCC)}, for information on more options offered by the GBE shared by @command{gfortran}, @command{gcc}, and other GNU compilers. - @c man end @node Environment Variables |