https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120019
--- Comment #12 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Uros Bizjak <u...@gcc.gnu.org>: https://gcc.gnu.org/g:c182f4d14d65b3e012ad65b5014d86352fabc86f commit r16-393-gc182f4d14d65b3e012ad65b5014d86352fabc86f Author: Uros Bizjak <ubiz...@gmail.com> Date: Mon May 5 13:59:43 2025 +0200 i386: Do not use explicit operands for MOVS instructions [PR120019] Some assemblers do not support MOVS instructions with explicit operands. Emit instruction with implicit operands, but prefix the instruction with a segment override prefix if the memory operand refers to ADDR_SPACE_SEG_FS or ADDR_SPACE_SEG_GS named address space. PR target/120019 gcc/ChangeLog: * config/i386/i386.cc (ix86_print_operand): Handle 'v' operand modifier to emit segment override prefix. * config/i386/i386.md (*strmovdi_rex_1): Use %v operand modifier to emit segment override prefix. (*strmovsi_1): Ditto. (*strmovhi_1): Ditto. (*strmovqi_1): Ditto. (*rep_movdi_rex64): Ditto. (*rep_movsi): Ditto. (*rep_movqi): Ditto. gcc/testsuite/ChangeLog: * gcc.target/i386/pr111657-1.c (dg-do): Change to "assemble". (dg-options): Remove -masm=att and add -save-temps. (dg-final): Update scan-assembler and scan-assembler-not strings. Co-authored-by: Rainer Orth <r...@cebitec.uni-bielefeld.de>
