#include "stringpool.h"
#include "attribs.h"
#include "cfgloop.h"
+#include "convert.h"
/* Describe the OpenACC looping structure of a function. The entire
function is held in a 'NULL' loop. */
return false;
}
+struct addr_expr_rewrite_info
+{
+ gimple *stmt;
+ hash_set<tree> *adjusted_vars;
+ bool avoid_pointer_conversion;
+ bool modified;
+};
+
+static tree
+rewrite_addr_expr (tree *tp, int *walk_subtrees, void *data)
+{
+ walk_stmt_info *wi = (walk_stmt_info *) data;
+ addr_expr_rewrite_info *info = (addr_expr_rewrite_info *) wi->info;
+
+ if (TREE_CODE (*tp) == ADDR_EXPR)
+ {
+ tree arg = TREE_OPERAND (*tp, 0);
+
+ if (info->adjusted_vars->contains (arg))
+ {
+ if (info->avoid_pointer_conversion)
+ {
+ *tp = build_fold_addr_expr (arg);
+ info->modified = true;
+ *walk_subtrees = 0;
+ }
+ else
+ {
+ gimple_stmt_iterator gsi = gsi_for_stmt (info->stmt);
+ tree repl = build_fold_addr_expr (arg);
+ gimple *stmt1
+ = gimple_build_assign (make_ssa_name (TREE_TYPE (repl)), repl);
+ tree conv = convert_to_pointer (TREE_TYPE (*tp),
+ gimple_assign_lhs (stmt1));
+ gimple *stmt2
+ = gimple_build_assign (make_ssa_name (TREE_TYPE (*tp)), conv);
+ gsi_insert_before (&gsi, stmt1, GSI_SAME_STMT);
+ gsi_insert_before (&gsi, stmt2, GSI_SAME_STMT);
+ *tp = gimple_assign_lhs (stmt2);
+ info->modified = true;
+ *walk_subtrees = 0;
+ }
+ }
+ }
+
+ return NULL_TREE;
+}
+
+/* Return TRUE if CALL is a call to a builtin atomic/sync operation. */
+
+static bool
+is_sync_builtin_call (gcall *call)
+{
+ tree callee = gimple_call_fndecl (call);
+
+ if (callee != NULL_TREE
+ && gimple_call_builtin_p (call, BUILT_IN_NORMAL))
+ switch (DECL_FUNCTION_CODE (callee))
+ {
+#undef DEF_SYNC_BUILTIN
+#define DEF_SYNC_BUILTIN(ENUM, NAME, TYPE, ATTRS) case ENUM:
+#include "sync-builtins.def"
+#undef DEF_SYNC_BUILTIN
+ return true;
+
+ default:
+ ;
+ }
+
+ return false;
+}
+
/* Main entry point for oacc transformations which run on the device
compiler after LTO, so we know what the target device is at this
point (including the host fallback). */
gsi_next (&gsi);
}
+ /* Make adjustments to gang-private local variables if required by the
+ target, e.g. forcing them into a particular address space. Afterwards,
+ ADDR_EXPR nodes which have adjusted variables as their argument need to
+ be modified in one of two ways:
+
+ 1. They can be recreated, making a pointer to the variable in the new
+ address space, or
+
+ 2. The address of the variable in the new address space can be taken,
+ converted to the default (original) address space, and the result of
+ that conversion subsituted in place of the original ADDR_EXPR node.
+
+ Which of these is done depends on the gimple statement being processed.
+ At present atomic operations and inline asms use (1), and everything else
+ uses (2). At least on AMD GCN, there are atomic operations that work
+ directly in the LDS address space. */
+
+ if (targetm.goacc.adjust_gangprivate_decl)
+ {
+ tree var;
+ unsigned i;
+ hash_set<tree> adjusted_vars;
+
+ FOR_EACH_LOCAL_DECL (cfun, i, var)
+ {
+ if (!VAR_P (var)
+ || !lookup_attribute ("oacc gangprivate", DECL_ATTRIBUTES (var)))
+ continue;
+
+ targetm.goacc.adjust_gangprivate_decl (var);
+ adjusted_vars.add (var);
+ }
+
+ FOR_ALL_BB_FN (bb, cfun)
+ for (gimple_stmt_iterator gsi = gsi_start_bb (bb);
+ !gsi_end_p (gsi);
+ gsi_next (&gsi))
+ {
+ gimple *stmt = gsi_stmt (gsi);
+ walk_stmt_info wi;
+ addr_expr_rewrite_info info;
+
+ info.avoid_pointer_conversion
+ = (is_gimple_call (stmt)
+ && is_sync_builtin_call (as_a <gcall *> (stmt)))
+ || gimple_code (stmt) == GIMPLE_ASM;
+ info.stmt = stmt;
+ info.modified = false;
+ info.adjusted_vars = &adjusted_vars;
+
+ memset (&wi, 0, sizeof (wi));
+ wi.info = &info;
+
+ walk_gimple_op (stmt, rewrite_addr_expr, &wi);
+
+ if (info.modified)
+ update_stmt (stmt);
+ }
+ }
+
free_oacc_loop (loops);
return 0;
projects / thirdparty / gcc.git / commitdiff
