[Bug tree-optimization/115157] incorrect TBAA for derived types involving enum types
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115157 --- Comment #6 from uecker at gcc dot gnu.org --- PATCH: https://gcc.gnu.org/pipermail/gcc-patches/2024-June/655473.html
[Bug tree-optimization/115157] incorrect TBAA for derived types involving enum types
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115157 Thiago Jung Bauermann changed: What|Removed |Added CC||thiago.bauermann at linaro dot org --- Comment #5 from Thiago Jung Bauermann --- FWIW this is being tracked in the Linaro CI at: https://linaro.atlassian.net/browse/GNU-1224
[Bug tree-optimization/115157] incorrect TBAA for derived types involving enum types
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115157 --- Comment #4 from Richard Earnshaw --- The tests in the last patch fail on arm-eabi. The tests assume that sizeof(enum) == sizeof(int), which is not true if -fshort-enum is the default. + Changes for ./gcc/testsuite/gcc/gcc.sum.sent + New tests that FAIL (6 tests): arm-qemu/-mthumb: gcc: gcc.dg/enum-alias-1.c (test for excess errors) arm-qemu/-mthumb: gcc: gcc.dg/enum-alias-2.c execution test arm-qemu/-mthumb: gcc: gcc.dg/enum-alias-3.c execution test
[Bug tree-optimization/115157] incorrect TBAA for derived types involving enum types
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115157 --- Comment #3 from GCC Commits --- The master branch has been updated by Martin Uecker : https://gcc.gnu.org/g:867d1264fe71d4291194373d1a1c409cac97a597 commit r15-933-g867d1264fe71d4291194373d1a1c409cac97a597 Author: Martin Uecker Date: Sun May 19 23:13:22 2024 +0200 C: allow aliasing of compatible types derived from enumeral types [PR115157] Aliasing of enumeral types with the underlying integer is now allowed by setting the aliasing set to zero. But this does not allow aliasing of derived types which are compatible as required by ISO C. Instead, initially set structural equality. Then set TYPE_CANONICAL and update pointers and main variants when the type is completed (as done for structures and unions in C23). PR tree-optimization/115157 PR tree-optimization/115177 gcc/c/ * c-decl.cc (shadow_tag-warned,parse_xref_tag,start_enum, finish_enum): Set SET_TYPE_STRUCTURAL_EQUALITY / TYPE_CANONICAL. * c-objc-common.cc (get_alias_set): Remove special case. (get_aka_type): Add special case. gcc/c-family/ * c-attribs.cc (handle_hardbool_attribute): Set TYPE_CANONICAL for hardbools. gcc/ * godump.cc (go_output_typedef): Use TYPE_MAIN_VARIANT instead of TYPE_CANONICAL. gcc/testsuite/ * gcc.dg/enum-alias-1.c: New test. * gcc.dg/enum-alias-2.c: New test. * gcc.dg/enum-alias-3.c: New test. * gcc.dg/enum-alias-4.c: New test.
[Bug tree-optimization/115157] incorrect TBAA for derived types involving enum types
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115157 --- Comment #2 from Martin Uecker --- PATCH: https://gcc.gnu.org/pipermail/gcc-patches/2024-May/652669.html
[Bug tree-optimization/115157] incorrect TBAA for derived types involving enum types
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115157 uecker at gcc dot gnu.org changed: What|Removed |Added CC||uecker at gcc dot gnu.org --- Comment #1 from uecker at gcc dot gnu.org --- Created attachment 58246 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=58246=edit patch Candidate patch by setting TYPE_CANONICAL based on the underlying type.
