diff options
Diffstat (limited to 'gcc/flow.c')
| -rw-r--r-- | gcc/flow.c | 7 |
1 files changed, 4 insertions, 3 deletions
@@ -2554,15 +2554,17 @@ mark_set_1 (struct propagate_block_info *pbi, enum rtx_code code, rtx reg, rtx c flags); return; - case ZERO_EXTRACT: case SIGN_EXTRACT: + /* SIGN_EXTRACT cannot be an lvalue. */ + gcc_unreachable (); + + case ZERO_EXTRACT: case STRICT_LOW_PART: /* ??? Assumes STRICT_LOW_PART not used on multi-word registers. */ do reg = XEXP (reg, 0); while (GET_CODE (reg) == SUBREG || GET_CODE (reg) == ZERO_EXTRACT - || GET_CODE (reg) == SIGN_EXTRACT || GET_CODE (reg) == STRICT_LOW_PART); if (MEM_P (reg)) break; @@ -3844,7 +3846,6 @@ mark_used_regs (struct propagate_block_info *pbi, rtx x, rtx cond, rtx insn) then this SET is not needed. */ while (GET_CODE (testreg) == STRICT_LOW_PART || GET_CODE (testreg) == ZERO_EXTRACT - || GET_CODE (testreg) == SIGN_EXTRACT || GET_CODE (testreg) == SUBREG) { #ifdef CANNOT_CHANGE_MODE_CLASS |