Thanks for the quick response.
Patch built and regtested on x86_64-unknown-linux-gnu.
Currently the stub for sync memory in single.c invokes "asm volatile
("" : : : "memory")" but _gfortran_caf_sync_memory is not called when
the code is compiled with -fcoarray=single.
Please let me know if I have to change the patch for -fcoarray=single.
2015-03-06 11:20 GMT-08:00 Tobias Burnus <bur...@net-b.de>:
> Dear Alessandro,
>
> Alessandro Fanfarillo wrote:
>
> so far a "sync memory" statement is translated into a local
> "__sync_synchronize ()".
> The attached draft patch delegates the action for sync memory (when
> -fcoarray=lib is used) to the external function
> _gfortran_caf_sync_memory() implemented in the OpenCoarrays library.
>
>
> Looks good to me. However, you should add a test case with 'dg-options
> "-fdump-tree-original -fcoarray=lib"' to check that this works; cf.
> gcc/testsuite/gfortran.dg/coarray*.f90 for examples.
>
> And you have to provide a stub implementation in
> libgfortran/caf/{libcaf.h,single.c}.
>
> Tobias
>
> PS: I wonder whether it makes sense to remove the __sync_synchronize for
> -fcoarray=single and replace it by the equivalent to "asm volatile ("" : : :
> "memory")". It almost certainly does.
2015-03-09 Alessandro Fanfarillo fanfarillo....@gmail.com
trans-decl.c: Add function declaration caf_sync_memory
trans.h: Ditto
trans-stmt.c: Add caf_sync_memory invocation
coarray_38.f90: Test case
single.c: caf_sync_memory implementation
libcaf.h: caf_sync_memory prototype
diff --git a/gcc/fortran/trans-decl.c b/gcc/fortran/trans-decl.c
index 3664824..a66c25c 100644
--- a/gcc/fortran/trans-decl.c
+++ b/gcc/fortran/trans-decl.c
@@ -153,6 +153,7 @@ tree gfor_fndecl_caf_get;
tree gfor_fndecl_caf_send;
tree gfor_fndecl_caf_sendget;
tree gfor_fndecl_caf_sync_all;
+tree gfor_fndecl_caf_sync_memory;
tree gfor_fndecl_caf_sync_images;
tree gfor_fndecl_caf_error_stop;
tree gfor_fndecl_caf_error_stop_str;
@@ -3451,6 +3452,10 @@ gfc_build_builtin_function_decls (void)
get_identifier (PREFIX("caf_sync_all")), ".WW", void_type_node,
3, pint_type, pchar_type_node, integer_type_node);
+ gfor_fndecl_caf_sync_memory = gfc_build_library_function_decl_with_spec (
+ get_identifier (PREFIX("caf_sync_memory")), ".WW", void_type_node,
+ 3, pint_type, pchar_type_node, integer_type_node);
+
gfor_fndecl_caf_sync_images = gfc_build_library_function_decl_with_spec (
get_identifier (PREFIX("caf_sync_images")), ".RRWW", void_type_node,
5, integer_type_node, pint_type, pint_type,
diff --git a/gcc/fortran/trans-stmt.c b/gcc/fortran/trans-stmt.c
index 505f905..dce0e87 100644
--- a/gcc/fortran/trans-stmt.c
+++ b/gcc/fortran/trans-stmt.c
@@ -768,8 +768,7 @@ gfc_trans_sync (gfc_code *code, gfc_exec_op type)
else
stat = null_pointer_node;
- if (code->expr3 && flag_coarray == GFC_FCOARRAY_LIB
- && type != EXEC_SYNC_MEMORY)
+ if (code->expr3 && flag_coarray == GFC_FCOARRAY_LIB)
{
gcc_assert (code->expr3->expr_type == EXPR_VARIABLE);
gfc_init_se (&argse, NULL);
@@ -778,7 +777,7 @@ gfc_trans_sync (gfc_code *code, gfc_exec_op type)
errmsg = gfc_build_addr_expr (NULL, argse.expr);
errmsglen = argse.string_length;
}
- else if (flag_coarray == GFC_FCOARRAY_LIB && type != EXEC_SYNC_MEMORY)
+ else if (flag_coarray == GFC_FCOARRAY_LIB)
{
errmsg = null_pointer_node;
errmsglen = build_int_cst (integer_type_node, 0);
@@ -822,13 +821,13 @@ gfc_trans_sync (gfc_code *code, gfc_exec_op type)
gfc_add_expr_to_block (&se.pre, tmp);
}
- if (flag_coarray != GFC_FCOARRAY_LIB || type == EXEC_SYNC_MEMORY)
+ if (flag_coarray != GFC_FCOARRAY_LIB)
{
/* Set STAT to zero. */
if (code->expr2)
gfc_add_modify (&se.pre, stat, build_int_cst (TREE_TYPE (stat), 0));
}
- else if (type == EXEC_SYNC_ALL)
+ else if (type == EXEC_SYNC_ALL || type == EXEC_SYNC_MEMORY)
{
/* SYNC ALL => stat == null_pointer_node
SYNC ALL(stat=s) => stat has an integer type
@@ -840,8 +839,13 @@ gfc_trans_sync (gfc_code *code, gfc_exec_op type)
if (TREE_TYPE (stat) == integer_type_node)
stat = gfc_build_addr_expr (NULL, stat);
- tmp = build_call_expr_loc (input_location, gfor_fndecl_caf_sync_all,
- 3, stat, errmsg, errmsglen);
+ if(type == EXEC_SYNC_MEMORY)
+ tmp = build_call_expr_loc (input_location,
gfor_fndecl_caf_sync_memory,
+ 3, stat, errmsg, errmsglen);
+ else
+ tmp = build_call_expr_loc (input_location, gfor_fndecl_caf_sync_all,
+ 3, stat, errmsg, errmsglen);
+
gfc_add_expr_to_block (&se.pre, tmp);
}
else
diff --git a/gcc/fortran/trans.h b/gcc/fortran/trans.h
index bd1520a..3ba2f88 100644
--- a/gcc/fortran/trans.h
+++ b/gcc/fortran/trans.h
@@ -731,6 +731,7 @@ extern GTY(()) tree gfor_fndecl_caf_get;
extern GTY(()) tree gfor_fndecl_caf_send;
extern GTY(()) tree gfor_fndecl_caf_sendget;
extern GTY(()) tree gfor_fndecl_caf_sync_all;
+extern GTY(()) tree gfor_fndecl_caf_sync_memory;
extern GTY(()) tree gfor_fndecl_caf_sync_images;
extern GTY(()) tree gfor_fndecl_caf_error_stop;
extern GTY(()) tree gfor_fndecl_caf_error_stop_str;
diff --git a/gcc/testsuite/gfortran.dg/coarray_38.f90
b/gcc/testsuite/gfortran.dg/coarray_38.f90
new file mode 100644
index 0000000..01b5b31
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/coarray_38.f90
@@ -0,0 +1,11 @@
+! { dg-do compile }
+! { dg-options "-fcoarray=lib -fdump-tree-original" }
+!
+! Coarray sync memory managed by external library
+!
+implicit none
+integer :: n
+sync memory
+end
+! { dg-final { scan-tree-dump-times "_gfortran_caf_sync_memory \\(0B, 0B,
0\\);" 1 "original" } }
+! { dg-final { cleanup-tree-dump "original" } }
diff --git a/libgfortran/caf/libcaf.h b/libgfortran/caf/libcaf.h
index bd5c9c6..27e0d62 100644
--- a/libgfortran/caf/libcaf.h
+++ b/libgfortran/caf/libcaf.h
@@ -99,6 +99,7 @@ void *_gfortran_caf_register (size_t, caf_register_t,
caf_token_t *, int *,
char *, int);
void _gfortran_caf_deregister (caf_token_t *, int *, char *, int);
+void _gfortran_caf_sync_memory(int *, char *, int);
void _gfortran_caf_sync_all (int *, char *, int);
void _gfortran_caf_sync_images (int, int[], int *, char *, int);
diff --git a/libgfortran/caf/single.c b/libgfortran/caf/single.c
index 7405c91..8eb61c3 100644
--- a/libgfortran/caf/single.c
+++ b/libgfortran/caf/single.c
@@ -156,6 +156,17 @@ _gfortran_caf_deregister (caf_token_t *token, int *stat,
*stat = 0;
}
+void
+_gfortran_caf_sync_memory(int *stat,
+ char *errmsg __attribute__ ((unused)),
+ int errmsg_len __attribute__ ((unused)))
+{
+ if (stat)
+ *stat = 0;
+
+ asm volatile("" ::: "memory");
+}
+
void
_gfortran_caf_sync_all (int *stat,
