diff options
Diffstat (limited to 'gcc/cse.c')
| -rw-r--r-- | gcc/cse.c | 12 |
1 files changed, 6 insertions, 6 deletions
@@ -8731,7 +8731,7 @@ count_reg_usage (x, counts, dest, incr) case EXPR_LIST: case INSN_LIST: if (REG_NOTE_KIND (x) == REG_EQUAL - || GET_CODE (XEXP (x,0)) == USE) + || (REG_NOTE_KIND (x) != REG_NONNEG && GET_CODE (XEXP (x,0)) == USE)) count_reg_usage (XEXP (x, 0), counts, NULL_RTX, incr); count_reg_usage (XEXP (x, 1), counts, NULL_RTX, incr); return; @@ -8754,13 +8754,13 @@ count_reg_usage (x, counts, dest, incr) /* Scan all the insns and delete any that are dead; i.e., they store a register that is never used or they copy a register to itself. - This is used to remove insns made obviously dead by cse. It improves the - heuristics in loop since it won't try to move dead invariants out of loops - or make givs for dead quantities. The remaining passes of the compilation - are also sped up. */ + This is used to remove insns made obviously dead by cse, loop or other + optimizations. It improves the heuristics in loop since it won't try to + move dead invariants out of loops or make givs for dead quantities. The + remaining passes of the compilation are also sped up. */ void -delete_dead_from_cse (insns, nreg) +delete_trivially_dead_insns (insns, nreg) rtx insns; int nreg; { |