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| author | Jan Hubicka <jh@suse.cz> | 2021-11-19 18:09:13 +0100 |
|---|---|---|
| committer | Jan Hubicka <jh@suse.cz> | 2021-11-19 18:09:13 +0100 |
| commit | ada63d56beb0e535d35b165b55f85e29a0b36929 (patch) | |
| tree | b809bfa4f6a962e625f2c437130a2eb60e0ba7d4 /libgcc | |
| parent | 16137fbb9256ef365dd498d39024eb33de1a4cd8 (diff) | |
| download | gcc-ada63d56beb0e535d35b165b55f85e29a0b36929.zip gcc-ada63d56beb0e535d35b165b55f85e29a0b36929.tar.gz gcc-ada63d56beb0e535d35b165b55f85e29a0b36929.tar.bz2 | |
Use modref even for nested functions in ref_maybe_used_by_call_p_1
Remove test for function not having call chain guarding modref use in
ref_maybe_used_by_call_p_1. It never made sense since modref treats call chain
accesses explicitly. It was however copied from earlier check for ECF_CONST
(which seems dubious too, but I would like to discuss it independelty).
This enables us to detect that memory pointed to static chain (or parts of it)
are unused by the function.
lto-bootstrapped-regtested all lanugages on x86_64-linux.
gcc/ChangeLog:
2021-11-19 Jan Hubicka <hubicka@ucw.cz>
* tree-ssa-alias.c (ref_maybe_used_by_call_p_1): Do not guard modref
by !gimple_call_chain.
gcc/testsuite/ChangeLog:
2021-11-19 Jan Hubicka <hubicka@ucw.cz>
* gcc.dg/tree-ssa/modref-dse-6.c: New test.
Diffstat (limited to 'libgcc')
0 files changed, 0 insertions, 0 deletions