[PR 82808] Use proper result types for arithmetic jump functions

2017-11-28  Prathamesh Kulkarni  <prathamesh.kulkarni@linaro.org>
	    Martin Jambor  <mjambor@suse.cz>

	PR ipa/82808
	* tree.h (expr_type_first_operand_type_p): Declare
	* tree.c (expr_type_first_operand_type_p): New function.
	* ipa-prop.h (ipa_get_type): Allow i to be out of bounds.
	(ipa_value_from_jfunc): Adjust declaration.
	* ipa-cp.c (ipa_get_jf_pass_through_result): New parameter RES_TYPE.
	Use it as result type for arithmetics, unless it is NULL in which case
	be more conservative.
	(ipa_value_from_jfunc): New parameter PARM_TYPE, pass it to
	ipa_get_jf_pass_through_result.
	(propagate_vals_across_pass_through): Likewise.
	(propagate_scalar_across_jump_function): New parameter PARM_TYPE, pass
	is to propagate_vals_across_pass_through.
	(propagate_constants_across_call): Pass PARM_TYPE to
	propagate_scalar_across_jump_function.
	(find_more_scalar_values_for_callers_subset): Pass parameter type to
	ipa_value_from_jfunc.
	(cgraph_edge_brings_all_scalars_for_node): Likewise.
	* ipa-fnsummary.c (evaluate_properties_for_edge): Renamed parms_info
	to caller_parms_info, pass parameter type to ipa_value_from_jfunc.
	* ipa-prop.c (try_make_edge_direct_simple_call): New parameter
	target_type, pass it to ipa_value_from_jfunc.
	(update_indirect_edges_after_inlining): Pass parameter type to
	try_make_edge_direct_simple_call.

testsuite/
	* gcc.dg/ipa/pr82808.c: New test.


Co-Authored-By: Martin Jambor <mjambor@suse.cz>

From-SVN: r255212

1 files changed, 44 insertions, 0 deletions

diff --git a/gcc/tree.c b/gcc/tree.c
index 28970df..b99304c 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -13898,6 +13898,50 @@ arg_size_in_bytes (const_tree type)
   return TYPE_EMPTY_P (type) ? size_zero_node : size_in_bytes (type);
 }
 
+/* Return true if an expression with CODE has to have the same result type as
+   its first operand.  */
+
+bool
+expr_type_first_operand_type_p (tree_code code)
+{
+  switch (code)
+    {
+    case NEGATE_EXPR:
+    case ABS_EXPR:
+    case BIT_NOT_EXPR:
+    case PAREN_EXPR:
+    case CONJ_EXPR:
+
+    case PLUS_EXPR:
+    case MINUS_EXPR:
+    case MULT_EXPR:
+    case TRUNC_DIV_EXPR:
+    case CEIL_DIV_EXPR:
+    case FLOOR_DIV_EXPR:
+    case ROUND_DIV_EXPR:
+    case TRUNC_MOD_EXPR:
+    case CEIL_MOD_EXPR:
+    case FLOOR_MOD_EXPR:
+    case ROUND_MOD_EXPR:
+    case RDIV_EXPR:
+    case EXACT_DIV_EXPR:
+    case MIN_EXPR:
+    case MAX_EXPR:
+    case BIT_IOR_EXPR:
+    case BIT_XOR_EXPR:
+    case BIT_AND_EXPR:
+
+    case LSHIFT_EXPR:
+    case RSHIFT_EXPR:
+    case LROTATE_EXPR:
+    case RROTATE_EXPR:
+      return true;
+
+    default:
+      return false;
+    }
+}
+
 /* List of pointer types used to declare builtins before we have seen their
    real declaration.