Message ID | 33db0e440aacdf86ba48f56d6b91fe9a0f7abf1d.1465347472.git.segher@kernel.crashing.org |
---|---|
State | New |
Headers | show |
diff --git a/gcc/regrename.c b/gcc/regrename.c index 54c7768..00a5d02 100644 --- a/gcc/regrename.c +++ b/gcc/regrename.c @@ -1867,6 +1867,12 @@ build_def_use (basic_block bb) scan_rtx (insn, &XEXP (note, 0), NO_REGS, terminate_dead, OP_IN); } + + /* Step 8: Kill the chains involving register restores. Those + should restore _that_ register. */ + for (note = REG_NOTES (insn); note; note = XEXP (note, 1)) + if (REG_NOTE_KIND (note) == REG_CFA_RESTORE) + scan_rtx (insn, &XEXP (note, 0), NO_REGS, mark_all_read, OP_IN); } else if (DEBUG_INSN_P (insn) && !VAR_LOC_UNKNOWN_P (INSN_VAR_LOCATION_LOC (insn)))