diff options
Diffstat (limited to 'gcc/reg-stack.c')
| -rw-r--r-- | gcc/reg-stack.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/reg-stack.c b/gcc/reg-stack.c index 83f4ebb..fc742bd 100644 --- a/gcc/reg-stack.c +++ b/gcc/reg-stack.c @@ -2282,6 +2282,16 @@ subst_stack_regs (rtx insn, stack regstack) if (NOTE_P (insn) || INSN_DELETED_P (insn)) return control_flow_insn_deleted; + /* If this a noreturn call, we can't insert pop insns after it. + Instead, reset the stack state to empty. */ + if (CALL_P (insn) + && find_reg_note (insn, REG_NORETURN, NULL)) + { + regstack->top = -1; + CLEAR_HARD_REG_SET (regstack->reg_set); + return control_flow_insn_deleted; + } + /* If there is a REG_UNUSED note on a stack register on this insn, the indicated reg must be popped. The REG_UNUSED note is removed, since the form of the newly emitted pop insn references the reg, |