From b8a2a12464d25c45a51c14a025e8e2d3ca8ebeb0 Mon Sep 17 00:00:00 2001 From: Richard Biener Date: Wed, 20 Sep 2023 08:40:34 +0200 Subject: tree-optimization/111489 - turn uninit limits to params The following turns MAX_NUM_CHAINS and MAX_CHAIN_LEN to params which allows to experiment with raising them. For the testcase in PR111489 raising MAX_CHAIN_LEN from 5 to 8 avoids the bogus diagnostics at -O2, at -O3 we need a MAX_CHAIN_LEN of 6. PR tree-optimization/111489 * doc/invoke.texi (--param uninit-max-chain-len): Document. (--param uninit-max-num-chains): Likewise. * params.opt (-param=uninit-max-chain-len=): New. (-param=uninit-max-num-chains=): Likewise. * gimple-predicate-analysis.cc (MAX_NUM_CHAINS): Define to param_uninit_max_num_chains. (MAX_CHAIN_LEN): Define to param_uninit_max_chain_len. (uninit_analysis::init_use_preds): Avoid VLA. (uninit_analysis::init_from_phi_def): Likewise. (compute_control_dep_chain): Avoid using MAX_CHAIN_LEN in template parameter. --- gcc/doc/invoke.texi | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'gcc/doc') diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 09b2b92..ba7984b 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -16348,6 +16348,13 @@ crossing a loop backedge when comparing to Maximum number of nested calls to search for control dependencies during uninitialized variable analysis. +@item uninit-max-chain-len +Maximum number of predicates anded for each predicate ored in the normalized +predicate chain. + +@item uninit-max-num-chains +Maximum number of predicates ored in the normalized predicate chain. + @item sched-autopref-queue-depth Hardware autoprefetcher scheduler model control flag. Number of lookahead cycles the model looks into; at ' -- cgit v1.1