[expr.c] PR target/65358 Avoid clobbering partial argument during sibcall

	PR target/65358
	* expr.c (memory_load_overlap): New function.
	(emit_push_insn): When pushing partial args to the stack would
	clobber the register part load the overlapping part into a pseudo
	and put it into the hard reg after pushing.  Change return type
	to bool.  Add bool argument.
	* expr.h (emit_push_insn): Change return type to bool.
	Add bool argument.
	* calls.c (expand_call): Cancel sibcall optimization when encountering
	partial argument on targets with ARGS_GROW_DOWNWARD and
	!STACK_GROWS_DOWNWARD.
	(emit_library_call_value_1): Update callsite of emit_push_insn.
	(store_one_arg): Likewise. 

	PR target/65358
	* gcc.dg/pr65358.c: New test.

From-SVN: r223753

1 files changed, 2 insertions, 2 deletions

diff --git a/gcc/expr.h b/gcc/expr.h
index e3afa8d..7b28ffd 100644
--- a/gcc/expr.h
+++ b/gcc/expr.h
@@ -219,8 +219,8 @@ extern rtx emit_move_resolve_push (machine_mode, rtx);
 extern rtx push_block (rtx, int, int);
 
 /* Generate code to push something onto the stack, given its mode and type.  */
-extern void emit_push_insn (rtx, machine_mode, tree, rtx, unsigned int,
-			    int, rtx, int, rtx, rtx, int, rtx);
+extern bool emit_push_insn (rtx, machine_mode, tree, rtx, unsigned int,
+			    int, rtx, int, rtx, rtx, int, rtx, bool);
 
 /* Expand an assignment that stores the value of FROM into TO.  */
 extern void expand_assignment (tree, tree, bool);