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| author | Richard Biener <rguenther@suse.de> | 2022-01-18 13:31:56 +0100 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2022-01-18 15:43:04 +0100 |
| commit | e89b2a270d31d7298d516ae545e256645992c7b9 (patch) | |
| tree | 52263b0204531b2d254bc7905f7b15d1156fb60a /gcc | |
| parent | 7402e40a2e2f5eac4489d28ac696e15c88c07f51 (diff) | |
| download | gcc-e89b2a270d31d7298d516ae545e256645992c7b9.zip gcc-e89b2a270d31d7298d516ae545e256645992c7b9.tar.gz gcc-e89b2a270d31d7298d516ae545e256645992c7b9.tar.bz2 | |
ipa/103989 - tame IPA optimizations at -Og
With -Og we are not prepared to do cleanup after IPA optimizations
and dead code exposed by those confuses late diagnostic passes.
This is a first patch removing unwanted IPA optimizations, namely
both late modref and pure-const analysis.
2022-01-18 Richard Biener <rguenther@suse.de>
PR ipa/103989
* passes.def (pass_all_optimizations_g): Remove pass_modref
and pass_local_pure_const.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/passes.def | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/gcc/passes.def b/gcc/passes.def index 7880842..3e75de4 100644 --- a/gcc/passes.def +++ b/gcc/passes.def @@ -372,6 +372,9 @@ along with GCC; see the file COPYING3. If not see POP_INSERT_PASSES () NEXT_PASS (pass_all_optimizations_g); PUSH_INSERT_PASSES_WITHIN (pass_all_optimizations_g) + /* The idea is that with -Og we do not perform any IPA optimization + so post-IPA work should be restricted to semantically required + passes and all optimization work is done early. */ NEXT_PASS (pass_remove_cgraph_callee_edges); NEXT_PASS (pass_strip_predict_hints, false /* early_p */); /* Lower remaining pieces of GIMPLE. */ @@ -399,8 +402,6 @@ along with GCC; see the file COPYING3. If not see number of false positives from it. */ NEXT_PASS (pass_split_crit_edges); NEXT_PASS (pass_late_warn_uninitialized); - NEXT_PASS (pass_local_pure_const); - NEXT_PASS (pass_modref); /* uncprop replaces constants by SSA names. This makes analysis harder and thus it should be run last. */ NEXT_PASS (pass_uncprop); |