> Hi. > > Following patch implements new predictors that annotates malloc-like > functions. > These almost every time return a non-null value. > > Patch can bootstrap on ppc64le-redhat-linux and survives regression tests. > > Ready to be installed? > Martin > > gcc/ChangeLog: > > 2018-07-26 Martin Liska <mli...@suse.cz> > > PR middle-end/83023 > * predict.c (expr_expected_value_1): Handle DECL_IS_MALLOC > declarations. > * predict.def (PRED_MALLOC_NONNULL): New predictor. > > gcc/testsuite/ChangeLog: > > 2018-07-26 Martin Liska <mli...@suse.cz> > > PR middle-end/83023 > * gcc.dg/predict-16.c: New test.
These are two conceptually different things - wether you return new memory and whether the return value is commonly non-null. While it goes together for majority of malloc function I wonder if this is safe WRT the auto-detected malloc attributes. I do not know how common is code that returns new memory only under some conditions? Honza
