On Thu, Sep 1, 2011 at 11:34 AM, Arnaud Charlet <char...@adacore.com> wrote:
> After doing a binary search, the first revision which breaks bootstrap on
> my environment with Ada enabled is the following:
>
> r178353 | vries | 2011-08-31 09:04:25 +0200 (Wed, 31 Aug 2011) | 8 lines
>
> 2011-08-31 Tom de Vries <t...@codesourcery.com>
>
> PR middle-end/43513
> * Makefile.in (tree-ssa-ccp.o): Add $(PARAMS_H) to rule.
> * tree-ssa-ccp.c (params.h): Include.
> (fold_builtin_alloca_for_var): New function.
> (ccp_fold_stmt): Use fold_builtin_alloca_for_var.
>
> Which makes sense, since Ada uses alloca a lot, much more than other
> languages.
>
> In other words, none of the changes in the Ada repository is reponsible for
> this regression.
>
> So Tom and/or Richard, could you please have a look at this regression? TIA.
Probably worth checking
Index: gcc/tree-ssa-ccp.c
===================================================================
--- gcc/tree-ssa-ccp.c (revision 178394)
+++ gcc/tree-ssa-ccp.c (working copy)
@@ -1714,7 +1714,7 @@ fold_builtin_alloca_for_var (gimple stmt
block = gimple_block (stmt);
if (!(cfun->after_inlining
&& TREE_CODE (BLOCK_SUPERCONTEXT (block)) == FUNCTION_DECL))
- threshold /= 10;
+ return NULL_TREE;
if (size > threshold)
return NULL_TREE;
should be reproducable with low stack ulimit.
Richard.
> Arno
>
