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authoramacleod <amacleod@138bc75d-0d04-0410-961f-82ee72b054a4>2013-10-02 15:29:35 +0000
committeramacleod <amacleod@138bc75d-0d04-0410-961f-82ee72b054a4>2013-10-02 15:29:35 +0000
commit0f4161b1bbf72b9dc7be8c5158b0b64c2de98c9f (patch)
tree5c2214fabbf4c67fc675ef1f8b0c28a4e7685280 /gcc/tree-ssa-copy.c
parent45ae37cf28ca90f34353a6d9fd0eec06e1ae1e4b (diff)
downloadgcc-0f4161b1bbf72b9dc7be8c5158b0b64c2de98c9f.tar.gz
2013-10-02 Andrew MacLeod <amacleod@redhat.com>
* tree-flow.h: Remove some prototypes. * gimple-fold.h: Add prototypes from gimple.h and tree-flow.h. * tree-ssa-propagate.h: Relocate prototypes from tree-flow.h. * tree-ssa-copy.c (may_propagate*, propagate_value, replace_exp, propagate_tree_value*): Move from here to... * tree-ssa-propagate.c (may_propagate*, propagate_value, replace_exp, propagate_tree_value*): Relocate here. * tree-ssa-propagate.h: Relocate prototypes from tree-flow.h. * gimple.h: Include gimple-fold.h, move prototypes into gimple-fold.h. * gimple-fold.c: Remove gimple-fold.h from include list. * tree-vrp.c: Remove gimple-fold.h from include list. * tree-ssa-sccvn.c: Remove gimple-fold.h from include list. * tree-ssa-ccp.c: Remove gimple-fold.h from include list. * tree-scalar-evolution.c: Add tree-ssa-propagate.h to include list. * tree-ssa-pre.c: Add tree-ssa-propagate.h to include list. * sese.c: Add tree-ssa-propagate.h to include list. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@203118 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/tree-ssa-copy.c')
-rw-r--r--gcc/tree-ssa-copy.c214
1 files changed, 0 insertions, 214 deletions
diff --git a/gcc/tree-ssa-copy.c b/gcc/tree-ssa-copy.c
index 5ab5389a7fa..c85749d511d 100644
--- a/gcc/tree-ssa-copy.c
+++ b/gcc/tree-ssa-copy.c
@@ -50,220 +50,6 @@ along with GCC; see the file COPYING3. If not see
replacements of one SSA_NAME with a different SSA_NAME to use the
APIs defined in this file. */
-/* Return true if we may propagate ORIG into DEST, false otherwise. */
-
-bool
-may_propagate_copy (tree dest, tree orig)
-{
- tree type_d = TREE_TYPE (dest);
- tree type_o = TREE_TYPE (orig);
-
- /* If ORIG flows in from an abnormal edge, it cannot be propagated. */
- if (TREE_CODE (orig) == SSA_NAME
- && SSA_NAME_OCCURS_IN_ABNORMAL_PHI (orig)
- /* If it is the default definition and an automatic variable then
- we can though and it is important that we do to avoid
- uninitialized regular copies. */
- && !(SSA_NAME_IS_DEFAULT_DEF (orig)
- && (SSA_NAME_VAR (orig) == NULL_TREE
- || TREE_CODE (SSA_NAME_VAR (orig)) == VAR_DECL)))
- return false;
-
- /* If DEST is an SSA_NAME that flows from an abnormal edge, then it
- cannot be replaced. */
- if (TREE_CODE (dest) == SSA_NAME
- && SSA_NAME_OCCURS_IN_ABNORMAL_PHI (dest))
- return false;
-
- /* Do not copy between types for which we *do* need a conversion. */
- if (!useless_type_conversion_p (type_d, type_o))
- return false;
-
- /* Generally propagating virtual operands is not ok as that may
- create overlapping life-ranges. */
- if (TREE_CODE (dest) == SSA_NAME && virtual_operand_p (dest))
- return false;
-
- /* Anything else is OK. */
- return true;
-}
-
-/* Like may_propagate_copy, but use as the destination expression
- the principal expression (typically, the RHS) contained in
- statement DEST. This is more efficient when working with the
- gimple tuples representation. */
-
-bool
-may_propagate_copy_into_stmt (gimple dest, tree orig)
-{
- tree type_d;
- tree type_o;
-
- /* If the statement is a switch or a single-rhs assignment,
- then the expression to be replaced by the propagation may
- be an SSA_NAME. Fortunately, there is an explicit tree
- for the expression, so we delegate to may_propagate_copy. */
-
- if (gimple_assign_single_p (dest))
- return may_propagate_copy (gimple_assign_rhs1 (dest), orig);
- else if (gimple_code (dest) == GIMPLE_SWITCH)
- return may_propagate_copy (gimple_switch_index (dest), orig);
-
- /* In other cases, the expression is not materialized, so there
- is no destination to pass to may_propagate_copy. On the other
- hand, the expression cannot be an SSA_NAME, so the analysis
- is much simpler. */
-
- if (TREE_CODE (orig) == SSA_NAME
- && SSA_NAME_OCCURS_IN_ABNORMAL_PHI (orig))
- return false;
-
- if (is_gimple_assign (dest))
- type_d = TREE_TYPE (gimple_assign_lhs (dest));
- else if (gimple_code (dest) == GIMPLE_COND)
- type_d = boolean_type_node;
- else if (is_gimple_call (dest)
- && gimple_call_lhs (dest) != NULL_TREE)
- type_d = TREE_TYPE (gimple_call_lhs (dest));
- else
- gcc_unreachable ();
-
- type_o = TREE_TYPE (orig);
-
- if (!useless_type_conversion_p (type_d, type_o))
- return false;
-
- return true;
-}
-
-/* Similarly, but we know that we're propagating into an ASM_EXPR. */
-
-bool
-may_propagate_copy_into_asm (tree dest ATTRIBUTE_UNUSED)
-{
- return true;
-}
-
-
-/* Common code for propagate_value and replace_exp.
-
- Replace use operand OP_P with VAL. FOR_PROPAGATION indicates if the
- replacement is done to propagate a value or not. */
-
-static void
-replace_exp_1 (use_operand_p op_p, tree val,
- bool for_propagation ATTRIBUTE_UNUSED)
-{
-#if defined ENABLE_CHECKING
- tree op = USE_FROM_PTR (op_p);
-
- gcc_assert (!(for_propagation
- && TREE_CODE (op) == SSA_NAME
- && TREE_CODE (val) == SSA_NAME
- && !may_propagate_copy (op, val)));
-#endif
-
- if (TREE_CODE (val) == SSA_NAME)
- SET_USE (op_p, val);
- else
- SET_USE (op_p, unshare_expr (val));
-}
-
-
-/* Propagate the value VAL (assumed to be a constant or another SSA_NAME)
- into the operand pointed to by OP_P.
-
- Use this version for const/copy propagation as it will perform additional
- checks to ensure validity of the const/copy propagation. */
-
-void
-propagate_value (use_operand_p op_p, tree val)
-{
- replace_exp_1 (op_p, val, true);
-}
-
-/* Replace *OP_P with value VAL (assumed to be a constant or another SSA_NAME).
-
- Use this version when not const/copy propagating values. For example,
- PRE uses this version when building expressions as they would appear
- in specific blocks taking into account actions of PHI nodes.
-
- The statement in which an expression has been replaced should be
- folded using fold_stmt_inplace. */
-
-void
-replace_exp (use_operand_p op_p, tree val)
-{
- replace_exp_1 (op_p, val, false);
-}
-
-
-/* Propagate the value VAL (assumed to be a constant or another SSA_NAME)
- into the tree pointed to by OP_P.
-
- Use this version for const/copy propagation when SSA operands are not
- available. It will perform the additional checks to ensure validity of
- the const/copy propagation, but will not update any operand information.
- Be sure to mark the stmt as modified. */
-
-void
-propagate_tree_value (tree *op_p, tree val)
-{
- gcc_checking_assert (!(TREE_CODE (val) == SSA_NAME
- && *op_p
- && TREE_CODE (*op_p) == SSA_NAME
- && !may_propagate_copy (*op_p, val)));
-
- if (TREE_CODE (val) == SSA_NAME)
- *op_p = val;
- else
- *op_p = unshare_expr (val);
-}
-
-
-/* Like propagate_tree_value, but use as the operand to replace
- the principal expression (typically, the RHS) contained in the
- statement referenced by iterator GSI. Note that it is not
- always possible to update the statement in-place, so a new
- statement may be created to replace the original. */
-
-void
-propagate_tree_value_into_stmt (gimple_stmt_iterator *gsi, tree val)
-{
- gimple stmt = gsi_stmt (*gsi);
-
- if (is_gimple_assign (stmt))
- {
- tree expr = NULL_TREE;
- if (gimple_assign_single_p (stmt))
- expr = gimple_assign_rhs1 (stmt);
- propagate_tree_value (&expr, val);
- gimple_assign_set_rhs_from_tree (gsi, expr);
- }
- else if (gimple_code (stmt) == GIMPLE_COND)
- {
- tree lhs = NULL_TREE;
- tree rhs = build_zero_cst (TREE_TYPE (val));
- propagate_tree_value (&lhs, val);
- gimple_cond_set_code (stmt, NE_EXPR);
- gimple_cond_set_lhs (stmt, lhs);
- gimple_cond_set_rhs (stmt, rhs);
- }
- else if (is_gimple_call (stmt)
- && gimple_call_lhs (stmt) != NULL_TREE)
- {
- tree expr = NULL_TREE;
- bool res;
- propagate_tree_value (&expr, val);
- res = update_call_from_tree (gsi, expr);
- gcc_assert (res);
- }
- else if (gimple_code (stmt) == GIMPLE_SWITCH)
- propagate_tree_value (gimple_switch_index_ptr (stmt), val);
- else
- gcc_unreachable ();
-}
-
/*---------------------------------------------------------------------------
Copy propagation
---------------------------------------------------------------------------*/