GCC modified for the FreeChainXenon project
b1f30bf42d
Fix wrong code issues in ipa-sra where we are trying to prove that on every execution of a given function a call to other function will happen. The code uses post dominators and makes a wrong query (which passes only for first BB in function). Hoever post-dominators are only valid if fake edges for every possible reason for fuction execution to terminate are added. Fixing this using postdominators is somewhat costy since one needs to walk whole body and add a lot of fake edges. I ended up implementing a special purpose function for this which is also useful in ipa-modref and other places that does similar analysis. One does not need to modify CFG to use it and moreover for complex functions it usually stops on first unanalyzed function call and ends up being relatively cheap. Bootstrapped/regtested x86_64-linux, plan to commit it shortly. gcc/ChangeLog: 2023-01-16 Jan Hubicka <hubicka@ucw.cz> PR ipa/106077 * ipa-modref.cc (modref_access_analysis::analyze): Use find_always_executed_bbs. * ipa-sra.cc (process_scan_results): Likewise. * ipa-utils.cc (stmt_may_terminate_function_p): New function. (find_always_executed_bbs): New function. * ipa-utils.h (stmt_may_terminate_function_p): Declare. (find_always_executed_bbs): Declare. gcc/testsuite/ChangeLog: 2023-01-16 Jan Hubicka <hubicka@ucw.cz> * g++.dg/tree-ssa/pr106077.C: New test. |
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| c++tools | ||
| config | ||
| contrib | ||
| fixincludes | ||
| gcc | ||
| gnattools | ||
| gotools | ||
| include | ||
| INSTALL | ||
| intl | ||
| libada | ||
| libatomic | ||
| libbacktrace | ||
| libcc1 | ||
| libcody | ||
| libcpp | ||
| libdecnumber | ||
| libffi | ||
| libgcc | ||
| libgfortran | ||
| libgm2 | ||
| libgo | ||
| libgomp | ||
| libiberty | ||
| libitm | ||
| libobjc | ||
| libphobos | ||
| libquadmath | ||
| libsanitizer | ||
| libssp | ||
| libstdc++-v3 | ||
| libvtv | ||
| lto-plugin | ||
| maintainer-scripts | ||
| zlib | ||
| .dir-locals.el | ||
| .gitattributes | ||
| .gitignore | ||
| ABOUT-NLS | ||
| ar-lib | ||
| ChangeLog | ||
| ChangeLog.jit | ||
| ChangeLog.tree-ssa | ||
| compile | ||
| config-ml.in | ||
| config.guess | ||
| config.rpath | ||
| config.sub | ||
| configure | ||
| configure.ac | ||
| COPYING | ||
| COPYING.LIB | ||
| COPYING.RUNTIME | ||
| COPYING3 | ||
| COPYING3.LIB | ||
| depcomp | ||
| install-sh | ||
| libtool-ldflags | ||
| libtool.m4 | ||
| ltgcc.m4 | ||
| ltmain.sh | ||
| ltoptions.m4 | ||
| ltsugar.m4 | ||
| ltversion.m4 | ||
| lt~obsolete.m4 | ||
| MAINTAINERS | ||
| Makefile.def | ||
| Makefile.in | ||
| Makefile.tpl | ||
| missing | ||
| mkdep | ||
| mkinstalldirs | ||
| move-if-change | ||
| multilib.am | ||
| README | ||
| symlink-tree | ||
| test-driver | ||
| ylwrap | ||
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