https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99872
--- Comment #7 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:b51321bc5193b65b308a26663fc02f786ba6cc89 commit r11-8028-gb51321bc5193b65b308a26663fc02f786ba6cc89 Author: Jakub Jelinek <ja...@redhat.com> Date: Wed Apr 7 15:51:15 2021 +0200 varasm: Fix up constpool alias handling [PR99872] Last year, I have added in r11-2944-g0106300f6c3f7bae5eb1c46dbd45aa07c94e1b15 (aka PR54201 fix) code to find bitwise duplicates in constant pool and output them as aliases instead of duplicating the data. Unfortunately this broke mingw32 -m32. On most targets, ASM_GENERATE_INTERNAL_LABEL with "LC" emits something like *.LC123 and the targets don't add user label prefixes, so the aliases that we print should be something like .set .LC5, .LC6 or .set .LC5, .LC6 + 8 and I wasn't sure if ASM_OUTPUT_DEF can handle the * and therefore I have stripped it. But, on mingw32 -m32, ASM_GENERATE_INTERNAL_LABEL with "LC" emits *LC123 and the target has user label prefixes, which means what I wrote results in LC6: ... .set _LC5, _LC6 which results in unresolved symbols. I went through the ASM_OUTPUT_DEF definitions of all targets and all of them use assemble_name twice under the hood (with various differences on what they print before, in between or after those names). And assemble_name handles the name encoding properly, so if we pass it ASM_OUTPUT_DEF (..., "*.LC123", "*.LC456+16") it will emit .LC123 and .LC456+16 and if we pass it "*LC789", it will emit LC789. 2021-04-07 Jakub Jelinek <ja...@redhat.com> PR target/99872 * varasm.c (output_constant_pool_contents): Don't strip name encoding from XSTR (desc->sym, 0) or from label before passing those to ASM_OUTPUT_DEF.
