rtx insn = PREV_INSN (x);
rtx sequence = 0;
int seq_size = 0;
+ rtx next = NEXT_INSN (x);
int i;
/* If we are part of a delay slot sequence, point at the SEQUENCE. */
if (NEXT_INSN (insn) != x)
{
+ next = NEXT_INSN (NEXT_INSN (insn));
sequence = PATTERN (NEXT_INSN (insn));
seq_size = XVECLEN (sequence, 0);
if (GET_CODE (sequence) != SEQUENCE)
if (global_regs[i])
SET_HARD_REG_BIT (res->regs, i);
+ /* Check for a NOTE_INSN_SETJMP. If it exists, then we must
+ assume that this call can need any register.
+
+ This is done to be more conservative about how we handle setjmp.
+ We assume that they both use and set all registers. Using all
+ registers ensures that a register will not be considered dead
+ just because it crosses a setjmp call. A register should be
+ considered dead only if the setjmp call returns non-zero. */
+ if (next && GET_CODE (next) == NOTE
+ && NOTE_LINE_NUMBER (next) == NOTE_INSN_SETJMP)
+ SET_HARD_REG_SET (res->regs);
+
{
rtx link;