diff options
Diffstat (limited to 'gcc/reg-stack.c')
| -rw-r--r-- | gcc/reg-stack.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/gcc/reg-stack.c b/gcc/reg-stack.c index 0df425eebeb..f21d833c00b 100644 --- a/gcc/reg-stack.c +++ b/gcc/reg-stack.c @@ -1629,6 +1629,27 @@ subst_stack_regs_pat (rtx insn, stack regstack, rtx pat) replace_reg (src1, FIRST_STACK_REG); break; + case UNSPEC_FXAM: + + /* This insn only operate on the top of the stack. */ + + src1 = get_true_reg (&XVECEXP (pat_src, 0, 0)); + emit_swap_insn (insn, regstack, *src1); + + src1_note = find_regno_note (insn, REG_DEAD, REGNO (*src1)); + + replace_reg (src1, FIRST_STACK_REG); + + if (src1_note) + { + remove_regno_note (insn, REG_DEAD, + REGNO (XEXP (src1_note, 0))); + emit_pop_insn (insn, regstack, XEXP (src1_note, 0), + EMIT_AFTER); + } + + break; + case UNSPEC_SIN: case UNSPEC_COS: case UNSPEC_FRNDINT: |