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calls.c (expand_call): Strip a TARGET_EXPR if we're passing by invisible reference. 

* calls.c (expand_call): Strip a TARGET_EXPR if we're passing by
	invisible reference.

From-SVN: r24763
This commit is contained in:
Jason Merrill 1999-01-19 11:55:37 +00:00 committed by Jason Merrill
parent 97f6e72f22
commit 60409070a6
2 changed files with 21 additions and 0 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
Tue Jan 19 11:54:04 1999 Jason Merrill <jason@yorick.cygnus.com>
* calls.c (expand_call): Strip a TARGET_EXPR if we're passing by
invisible reference.
Tue Jan 19 14:51:36 1999 David Edelsohn <edelsohn@mhpcc.edu>
* rs6000.c (offsettable_addr_operand): Delete.

16
gcc/calls.c
View File

@ -1345,6 +1345,22 @@ expand_call (exp, target, ignore)
#endif
)
{
/* C++ uses a TARGET_EXPR to indicate that we want to make a
new object from the argument. If we are passing by
invisible reference, the callee will do that for us, so we
can strip off the TARGET_EXPR. This is not always safe,
but it is safe in the only case where this is a useful
optimization; namely, when the argument is a plain object.
In that case, the frontend is just asking the backend to
make a bitwise copy of the argument. */
if (TREE_CODE (args[i].tree_value) == TARGET_EXPR
&& (TREE_CODE_CLASS (TREE_CODE (TREE_OPERAND
(args[i].tree_value, 1)))
== 'd')
&& ! REG_P (DECL_RTL (TREE_OPERAND (args[i].tree_value, 1))))
args[i].tree_value = TREE_OPERAND (args[i].tree_value, 1);
args[i].tree_value = build1 (ADDR_EXPR,
build_pointer_type (type),
args[i].tree_value);