30a8771c0f
This patch fixes a wrong-code bug in the wake of PR92729, the transition that turned the AVR backend from cc0 to CCmode. In cc0, the insn that uses cc0 like a conditional branch always follows the cc0 setter, which is no more the case with CCmode where set and use of REG_CC might be in different basic blocks. This patch removes the machine-dependent reorg pass in avr_reorg entirely. It is replaced by a new, AVR specific mini-pass that runs prior to split2. Canonicalization of comparisons away from the "difficult" codes GT[U] and LE[U] is now mostly performed by implementing TARGET_CANONICALIZE_COMPARISON. Moreover: * Text peephole conditions get "dead_or_set_regno_p (*, REG_CC)" as needed. * RTL peephole conditions get "peep2_regno_dead_p (*, REG_CC)" as needed. * Conditional branches no more clobber REG_CC. * insn output for compares looks ahead to determine the branch mode in use. This needs also "dead_or_set_regno_p (*, REG_CC)". * Add RTL peepholes for decrement-and-branch detection. * Some of the patterns like "*cmphi.zero-extend.0" lost their combine-ational part wit PR92729. Restore them. Finally, it fixes some of the many indentation glitches left over from PR92729. gcc/ PR target/109650 PR target/92729 * config/avr/avr-passes.def (avr_pass_ifelse): Insert new pass. * config/avr/avr.cc (avr_pass_ifelse): New RTL pass. (avr_pass_data_ifelse): New pass_data for it. (make_avr_pass_ifelse, avr_redundant_compare, avr_cbranch_cost) (avr_canonicalize_comparison, avr_out_plus_set_ZN) (avr_out_cmp_ext): New functions. (compare_condtition): Make sure REG_CC dies in the branch insn. (avr_rtx_costs_1): Add computation of cbranch costs. (avr_adjust_insn_length) [ADJUST_LEN_ADD_SET_ZN, ADJUST_LEN_CMP_ZEXT]: [ADJUST_LEN_CMP_SEXT]Handle them. (TARGET_CANONICALIZE_COMPARISON): New define. (avr_simplify_comparison_p, compare_diff_p, avr_compare_pattern) (avr_reorg_remove_redundant_compare, avr_reorg): Remove functions. (TARGET_MACHINE_DEPENDENT_REORG): Remove define. * config/avr/avr-protos.h (avr_simplify_comparison_p): Remove proto. (make_avr_pass_ifelse, avr_out_plus_set_ZN, cc_reg_rtx) (avr_out_cmp_zext): New Protos * config/avr/avr.md (branch, difficult_branch): Don't split insns. (*cbranchhi.zero-extend.0", *cbranchhi.zero-extend.1") (*swapped_tst<mode>, *add.for.eqne.<mode>): New insns. (*cbranch<mode>4): Rename to cbranch<mode>4_insn. (define_peephole): Add dead_or_set_regno_p(insn,REG_CC) as needed. (define_deephole2): Add peep2_regno_dead_p(*,REG_CC) as needed. Add new RTL peepholes for decrement-and-branch and *swapped_tst<mode>. Rework signtest-and-branch peepholes for *sbrx_branch<mode>. (adjust_len) [add_set_ZN, cmp_zext]: New. (QIPSI): New mode iterator. (ALLs1, ALLs2, ALLs4, ALLs234): New mode iterators. (gelt): New code iterator. (gelt_eqne): New code attribute. (rvbranch, *rvbranch, difficult_rvbranch, *difficult_rvbranch) (branch_unspec, *negated_tst<mode>, *reversed_tst<mode>) (*cmpqi_sign_extend): Remove insns. (define_c_enum "unspec") [UNSPEC_IDENTITY]: Remove. * config/avr/avr-dimode.md (cbranch<mode>4): Canonicalize comparisons. * config/avr/predicates.md (scratch_or_d_register_operand): New. * config/avr/constraints.md (Yxx): New constraint. gcc/testsuite/ PR target/109650 * gcc.target/avr/torture/pr109650-1.c: New test. * gcc.target/avr/torture/pr109650-2.c: New test. |
||
|---|---|---|
| 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 | ||
This directory contains the GNU Compiler Collection (GCC). The GNU Compiler Collection is free software. See the files whose names start with COPYING for copying permission. The manuals, and some of the runtime libraries, are under different terms; see the individual source files for details. The directory INSTALL contains copies of the installation information as HTML and plain text. The source of this information is gcc/doc/install.texi. The installation information includes details of what is included in the GCC sources and what files GCC installs. See the file gcc/doc/gcc.texi (together with other files that it includes) for usage and porting information. An online readable version of the manual is in the files gcc/doc/gcc.info*. See http://gcc.gnu.org/bugs/ for how to report bugs usefully. Copyright years on GCC source files may be listed using range notation, e.g., 1987-2012, indicating that every year in the range, inclusive, is a copyrightable year that could otherwise be listed individually.