tree-optimization/103551 - Always set EDGE_EXECUTABLE in ranger vrp.
Commit Message
The simplify_and_fold engine uses the EDGE_EXECUTABLE flag to eliminate
branches:
substitute_and_fold_dom_walker::before_dom_children:
if (gimple_code (stmt) == GIMPLE_COND)
{
if ((EDGE_SUCC (bb, 0)->flags & EDGE_EXECUTABLE)
^ (EDGE_SUCC (bb, 1)->flags & EDGE_EXECUTABLE))
... but if certain passes before VRP2 are turned off, the flag can be in
an uninitialized state upon entry to VRP2. This patch simply always
sets EDGE_EXECUTABLE on all edges before invoking ranger and the S&F engine.
Bootstraps on x86_64-pc-linux-gnu with no regressions.
OK for trunk?
Andrew
Comments
On Tue, Jan 11, 2022 at 8:49 PM Andrew MacLeod via Gcc-patches
<gcc-patches@gcc.gnu.org> wrote:
>
> The simplify_and_fold engine uses the EDGE_EXECUTABLE flag to eliminate
> branches:
>
> substitute_and_fold_dom_walker::before_dom_children:
>
> if (gimple_code (stmt) == GIMPLE_COND)
> {
> if ((EDGE_SUCC (bb, 0)->flags & EDGE_EXECUTABLE)
> ^ (EDGE_SUCC (bb, 1)->flags & EDGE_EXECUTABLE))
>
> ... but if certain passes before VRP2 are turned off, the flag can be in
> an uninitialized state upon entry to VRP2. This patch simply always
> sets EDGE_EXECUTABLE on all edges before invoking ranger and the S&F engine.
>
> Bootstraps on x86_64-pc-linux-gnu with no regressions.
>
> OK for trunk?
OK.
> Andrew
>
>
>
>
>
commit 09934a28871701f3cef5175c2a510cd09ec13836
Author: Andrew MacLeod <amacleod@redhat.com>
Date: Tue Jan 11 09:59:21 2022 -0500
Always set EDGE_EXECUTABLE in VRP2.
PR tree-optimization/103551
* tree-vrp.c (execute_ranger_vrp): Always set EDGE_EXECUTABLE.
@@ -4332,6 +4332,7 @@ execute_ranger_vrp (struct function *fun, bool warn_array_bounds_p)
scev_initialize ();
calculate_dominance_info (CDI_DOMINATORS);
+ set_all_edges_as_executable (fun);
gimple_ranger *ranger = enable_ranger (fun);
rvrp_folder folder (ranger);
folder.substitute_and_fold ();