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| author | Andrew Pinski <quic_apinski@quicinc.com> | 2024-09-03 12:48:46 -0700 |
|---|---|---|
| committer | Andrew Pinski <quic_apinski@quicinc.com> | 2024-09-04 07:32:47 -0700 |
| commit | 97e011a472e16ddab67d7374ee9c3db040b62798 (patch) | |
| tree | 9607adb6e788974ca9b819bd004d11223b0daf8b /gcc | |
| parent | 284feaa809294995d6c133b8d002850a069c1ded (diff) | |
| download | gcc-97e011a472e16ddab67d7374ee9c3db040b62798.zip gcc-97e011a472e16ddab67d7374ee9c3db040b62798.tar.gz gcc-97e011a472e16ddab67d7374ee9c3db040b62798.tar.bz2 | |
object-size: Use simple_dce_from_worklist in object-size pass
While trying to see if there was a way to improve object-size pass
to use the ranger (for pointer plus), I noticed that it leaves around
the statement containing __builtin_object_size if it was reduced to a constant.
This fixes that by using simple_dce_from_worklist.
Bootstrapped and tested on x86_64-linux-gnu.
gcc/ChangeLog:
* tree-object-size.cc (object_sizes_execute): Mark lhs for maybe dceing
if doing a propagate. Call simple_dce_from_worklist.
Signed-off-by: Andrew Pinski <quic_apinski@quicinc.com>
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/tree-object-size.cc | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/gcc/tree-object-size.cc b/gcc/tree-object-size.cc index 4c1fa9b..6544730 100644 --- a/gcc/tree-object-size.cc +++ b/gcc/tree-object-size.cc @@ -38,6 +38,7 @@ along with GCC; see the file COPYING3. If not see #include "builtins.h" #include "gimplify-me.h" #include "gimplify.h" +#include "tree-ssa-dce.h" struct object_size_info { @@ -2187,6 +2188,7 @@ static unsigned int object_sizes_execute (function *fun, bool early) { todo = 0; + auto_bitmap sdce_worklist; basic_block bb; FOR_EACH_BB_FN (bb, fun) @@ -2277,13 +2279,18 @@ object_sizes_execute (function *fun, bool early) /* Propagate into all uses and fold those stmts. */ if (!SSA_NAME_OCCURS_IN_ABNORMAL_PHI (lhs)) - replace_uses_by (lhs, result); + { + replace_uses_by (lhs, result); + /* Mark lhs as being possiblely DCEd. */ + bitmap_set_bit (sdce_worklist, SSA_NAME_VERSION (lhs)); + } else replace_call_with_value (&i, result); } } fini_object_sizes (); + simple_dce_from_worklist (sdce_worklist); return todo; } |