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| author | Olivier Hainque <hainque@adacore.com> | 2006-09-13 18:48:21 +0000 |
|---|---|---|
| committer | Eric Botcazou <ebotcazou@gcc.gnu.org> | 2006-09-13 18:48:21 +0000 |
| commit | 6f2789da074d0d9e68af0cf4bc79a64a3e552d03 (patch) | |
| tree | 07363f60721190c943580bee201d42d01e2ec4d8 /gcc | |
| parent | efaa616eeb3b3cc2cbe664ba9305d3035fb2d2d9 (diff) | |
| download | gcc-6f2789da074d0d9e68af0cf4bc79a64a3e552d03.zip gcc-6f2789da074d0d9e68af0cf4bc79a64a3e552d03.tar.gz gcc-6f2789da074d0d9e68af0cf4bc79a64a3e552d03.tar.bz2 | |
re PR ada/29025 (procedure doesn't modify In Out parameter)
PR ada/29025
* trans.c (gnat_gimplify_expr) <ADDR_EXPR>: When taking the address
of a SAVE_EXPR, just make the operand addressable/not-readonly and
let the common gimplifier code make and propagate a temporary copy.
(call_to_gnu): Clarify the use of SAVE_EXPR for not addressable
out/in-out actuals and defer setting the addressable/readonly bits
to the gimplifier.
From-SVN: r116929
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ada/ChangeLog | 10 | ||||
| -rw-r--r-- | gcc/ada/trans.c | 27 |
2 files changed, 27 insertions, 10 deletions
diff --git a/gcc/ada/ChangeLog b/gcc/ada/ChangeLog index 60fbf11..77cf3d31 100644 --- a/gcc/ada/ChangeLog +++ b/gcc/ada/ChangeLog @@ -1,3 +1,13 @@ +2006-09-13 Olivier Hainque <hainque@adacore.com> + + PR ada/29025 + * trans.c (gnat_gimplify_expr) <ADDR_EXPR>: When taking the address + of a SAVE_EXPR, just make the operand addressable/not-readonly and + let the common gimplifier code make and propagate a temporary copy. + (call_to_gnu): Clarify the use of SAVE_EXPR for not addressable + out/in-out actuals and defer setting the addressable/readonly bits + to the gimplifier. + 2006-09-13 Eric Botcazou <ebotcazou@adacore.com> PR ada/28591 diff --git a/gcc/ada/trans.c b/gcc/ada/trans.c index b7b3598..7fecc6f 100644 --- a/gcc/ada/trans.c +++ b/gcc/ada/trans.c @@ -1775,18 +1775,12 @@ call_to_gnu (Node_Id gnat_node, tree *gnu_result_type_p, tree gnu_target) && (TYPE_JUSTIFIED_MODULAR_P (gnu_name_type))) gnu_name = convert (gnu_name_type, gnu_name); + /* Make a SAVE_EXPR to both properly account for potential side + effects and handle the creation of a temporary copy. Special + code in gnat_gimplify_expr ensures that the same temporary is + used as the actual and copied back after the call. */ gnu_actual = save_expr (gnu_name); - /* Since we're going to take the address of the SAVE_EXPR, we - don't want it to be marked as unchanging. So set - TREE_ADDRESSABLE. */ - gnu_temp = skip_simple_arithmetic (gnu_actual); - if (TREE_CODE (gnu_temp) == SAVE_EXPR) - { - TREE_ADDRESSABLE (gnu_temp) = 1; - TREE_READONLY (gnu_temp) = 0; - } - /* Set up to move the copy back to the original. */ gnu_temp = build_binary_op (MODIFY_EXPR, NULL_TREE, gnu_copy, gnu_actual); @@ -4697,6 +4691,19 @@ gnat_gimplify_expr (tree *expr_p, tree *pre_p, tree *post_p ATTRIBUTE_UNUSED) return GS_ALL_DONE; } + /* If we are taking the address of a SAVE_EXPR, we are typically + processing a misaligned argument to be passed by reference in a + procedure call. We just mark the operand as addressable + not + readonly here and let the common gimplifier code perform the + temporary creation, initialization, and "instantiation" in place of + the SAVE_EXPR in further operands, in particular in the copy back + code inserted after the call. */ + else if (TREE_CODE (op) == SAVE_EXPR) + { + TREE_ADDRESSABLE (op) = 1; + TREE_READONLY (op) = 0; + } + /* Otherwise, if we are taking the address of something that is neither reference, declaration, or constant, make a variable for the operand here and then take its address. If we don't do it this way, we may |