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| author | Michael Matz <matz@suse.de> | 2011-04-15 19:48:25 +0000 |
|---|---|---|
| committer | Michael Matz <matz@gcc.gnu.org> | 2011-04-15 19:48:25 +0000 |
| commit | 63d2a3533fb013061b3a20ddcc26233d6368de32 (patch) | |
| tree | 2ca8a4769f794f0a8bad0116318e591f72ee7e8e /gcc/tree-inline.c | |
| parent | dee74c343634bec2e6909f197ce0b669820acc56 (diff) | |
| download | gcc-63d2a3533fb013061b3a20ddcc26233d6368de32.zip gcc-63d2a3533fb013061b3a20ddcc26233d6368de32.tar.gz gcc-63d2a3533fb013061b3a20ddcc26233d6368de32.tar.bz2 | |
tree.h (ALLOCA_FOR_VAR_P): Rename to CALL_ALLOCA_FOR_VAR_P.
* tree.h (ALLOCA_FOR_VAR_P): Rename to CALL_ALLOCA_FOR_VAR_P.
* builtins.c (expand_builtin): Use CALL_ALLOCA_FOR_VAR_P.
* function.c (gimplify_parameters): Ditto.
* gimplify.c (gimplify_vla_decl): Ditto.
* gimple.h (enum gf_mask): Add GF_CALL_ALLOCA_FOR_VAR.
(gimple_call_set_alloca_for_var): New inline function.
(gimple_call_alloca_for_var_p): Ditto.
* gimple.c (gimple_build_call_from_tree): Remember CALL_ALLOCA_FOR_VAR_P
state.
* cfgexpand.c (expand_call_stmt): Restore CALL_ALLOCA_FOR_VAR_P state.
* tree-inline.c (inline_forbidden_p_stmt): Don't reject alloca
calls if they were for VLA objects.
From-SVN: r172516
Diffstat (limited to 'gcc/tree-inline.c')
| -rw-r--r-- | gcc/tree-inline.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/gcc/tree-inline.c b/gcc/tree-inline.c index 84307ac..79c9538 100644 --- a/gcc/tree-inline.c +++ b/gcc/tree-inline.c @@ -2997,8 +2997,11 @@ inline_forbidden_p_stmt (gimple_stmt_iterator *gsi, bool *handled_ops_p, this may change program's memory overhead drastically when the function using alloca is called in loop. In GCC present in SPEC2000 inlining into schedule_block cause it to require 2GB of - RAM instead of 256MB. */ + RAM instead of 256MB. Don't do so for alloca calls emitted for + VLA objects as those can't cause unbounded growth (they're always + wrapped inside stack_save/stack_restore regions. */ if (gimple_alloca_call_p (stmt) + && !gimple_call_alloca_for_var_p (stmt) && !lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn))) { inline_forbidden_reason |