https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108684
--- Comment #15 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-12 branch has been updated by Andrew Pinski <pins...@gcc.gnu.org>: https://gcc.gnu.org/g:657e1e89d34b114ca47fe1f2c5366927c5850af7 commit r12-9239-g657e1e89d34b114ca47fe1f2c5366927c5850af7 Author: Andrew Pinski <apin...@marvell.com> Date: Tue Feb 7 23:09:40 2023 +0000 tree-optimization: [PR108684] ICE in verify_ssa due to simple_dce_from_worklist In simple_dce_from_worklist, we were removing an inline-asm which had a vdef. We should not be removing inline-asm which have a vdef as this code does not check to the store. This fixes that oversight. This was a latent bug exposed recently by both VRP and removal of stores to static starting to use simple_dce_from_worklist. Backported after bootstrapped and tested on x86_64-linux-gnu with no regressions. PR tree-optimization/108684 gcc/ChangeLog: * tree-ssa-dce.cc (simple_dce_from_worklist): Check all ssa names and not just non-vdef ones before accepting the inline-asm. Call unlink_stmt_vdef on the statement before removing it. gcc/testsuite/ChangeLog: * gcc.c-torture/compile/dce-inline-asm-1.c: New test. * gcc.c-torture/compile/dce-inline-asm-2.c: New test. * gcc.dg/tree-ssa/pr108684-1.c: New test. co-authored-by: Andrew Macleod <amacl...@redhat.com> (cherry picked from commit 6a5cb782d1486b378d70857c8efae558da0eb2cc)
