diff options
Diffstat (limited to 'gcc/reg-stack.c')
| -rw-r--r-- | gcc/reg-stack.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/gcc/reg-stack.c b/gcc/reg-stack.c index bace44e..25210f0c 100644 --- a/gcc/reg-stack.c +++ b/gcc/reg-stack.c @@ -1251,7 +1251,7 @@ swap_rtx_condition (rtx_insn *insn) { rtx pat = PATTERN (insn); - /* We're looking for a single set to cc0 or an HImode temporary. */ + /* We're looking for a single set to an HImode temporary. */ if (GET_CODE (pat) == SET && REG_P (SET_DEST (pat)) @@ -1298,7 +1298,7 @@ swap_rtx_condition (rtx_insn *insn) || ! dead_or_set_p (insn, dest)) return 0; - /* Now we are prepared to handle this as a normal cc0 setter. */ + /* Now we are prepared to handle this. */ insn = next_flags_user (insn); if (insn == NULL_RTX) return 0; @@ -1586,9 +1586,7 @@ subst_stack_regs_pat (rtx_insn *insn, stack_ptr regstack, rtx pat) break; case REG: - /* This is a `tstM2' case. */ - gcc_assert (*dest == cc0_rtx); - src1 = src; + gcc_unreachable (); /* Fall through. */ @@ -1596,8 +1594,7 @@ subst_stack_regs_pat (rtx_insn *insn, stack_ptr regstack, rtx pat) case SQRT: case ABS: case NEG: - /* These insns only operate on the top of the stack. DEST might - be cc0_rtx if we're processing a tstM pattern. Also, it's + /* These insns only operate on the top of the stack. It's possible that the tstM case results in a REG_DEAD note on the source. */ |