builtins.c (interclass_mathfn_icode): New helper.

	* builtins.c (interclass_mathfn_icode): New helper.
	(expand_builtin_interclass_mathfn): Use it here, and split folding
	into ...
	(fold_builtin_interclass_mathfn): ... this new folder.
	(build_call_nofold_loc): New static helper.
	(build_call_nofold): New wrapper macro for above.
	(expand_builtin_int_roundingfn): Use it instead of build_call_expr.
	(expand_builtin_pow): Ditto.
	(expand_builtin_memset_args): Ditto.
	(expand_builtin_printf): Ditto.
	(expand_builtin_fprintf): Ditto.
	(expand_builtin_sprintf): Ditto.
	(expand_builtin_memory_chk): Ditto.
	(expand_builtin_mempcpy_args): Ditto and don't call folders.
	(expand_builtin_stpcpy): Ditto.
	(expand_builtin_strcmp): Ditto.
	(expand_builtin_strncmp): Ditto.
	(expand_builtin_strcpy): Remove FNDECL and MODE arguments.
	(expand_builtin_strcpy_args): Don't call folders.
	(expand_builtin_memcmp): Ditto.
	(expand_builtin_strncpy): Ditto, and use target.
	(expand_builtin_memcpy): Ditto.
	(expand_builtin_strstr, expand_builtin_strchr, expand_builtin_strrchr,
	expand_builtin_strpbrk, expand_builtin_memmove,
	expand_builtin_memmove_args, expand_builtin_bcopy,
	expand_builtin_memchr, expand_builtin_strcat, expand_builtin_strncat,
	expand_builtin_strspn, expand_builtin_strcspn,
	expand_builtin_fputs): Remove these.
	(expand_builtin): Don't call the above, change calls to other
	expanders that changed prototype.
	(fold_builtin_stpcpy): New folder split out from expand_builtin_stpcpy.
	(fold_builtin_1 <ISFINITE, ISINF, ISNORMAL>): Call
	fold_builtin_interclass_mathfn.
	(fold_builtin_2 <STPCPY>): Call fold_builtin_stpcpy.
	(fold_builtin_strcat): Add folding split from expand_builtin_strcat.

	* fold-const.c (fold_binary_loc <NE_EXPR>): Add !exp != 0 -> !exp.
	* passes.c (init_optimization_passes): Move pass_fold_builtins
	after last phiopt pass.
	* tree-inline.c (fold_marked_statements): When folding builtins
	iterate over all instruction potentially generated.
	* tree-ssa-ccp.c (gimplify_and_update_call_from_tree): Declare
	earlier.
	(fold_gimple_call): Use it to always fold calls (into potentially
	multiple instructions).
	* tree-ssa-dom.c (optimize_stmt): Resolve __builtin_constant_p
	calls into zero at this time.
	* tree-ssa-propagate.c (substitute_and_fold): Ignore multiple 
	statements generated by builtin folding.

testsuite/
	* gcc.dg/builtins-44.c: Use __builtin_isinf_sign when checking
	for sign of -Inf.

From-SVN: r152236

1 files changed, 14 insertions, 0 deletions

diff --git a/gcc/tree-ssa-dom.c b/gcc/tree-ssa-dom.c
index 067a911..05a8d92 100644
--- a/gcc/tree-ssa-dom.c
+++ b/gcc/tree-ssa-dom.c
@@ -2133,6 +2133,20 @@ optimize_stmt (basic_block bb, gimple_stmt_iterator si)
     {
       eliminate_redundant_computations (&si);
       stmt = gsi_stmt (si);
+      if (gimple_code (stmt) == GIMPLE_CALL)
+	{
+	  /* Resolve __builtin_constant_p.  If it hasn't been
+	     folded to integer_one_node by now, it's fairly
+	     certain that the value simply isn't constant.  */
+	  tree callee = gimple_call_fndecl (stmt);
+	  if (callee
+	      && DECL_BUILT_IN_CLASS (callee) == BUILT_IN_NORMAL
+	      && DECL_FUNCTION_CODE (callee) == BUILT_IN_CONSTANT_P)
+	    {
+	      propagate_tree_value_into_stmt (&si, integer_zero_node);
+	      stmt = gsi_stmt (si);
+	    }
+	}
     }
 
   /* Record any additional equivalences created by this statement.  */