diff options
Diffstat (limited to 'gcc/reg-stack.c')
| -rw-r--r-- | gcc/reg-stack.c | 34 |
1 files changed, 16 insertions, 18 deletions
diff --git a/gcc/reg-stack.c b/gcc/reg-stack.c index 62f7d7b..83fc476 100644 --- a/gcc/reg-stack.c +++ b/gcc/reg-stack.c @@ -1560,12 +1560,6 @@ subst_stack_regs_pat (rtx_insn *insn, stack_ptr regstack, rtx pat) switch (GET_CODE (pat_src)) { - case COMPARE: - /* `fcomi' insn can't pop two regs. */ - compare_for_stack_reg (insn, regstack, pat_src, - REGNO (*dest) != FLAGS_REG); - break; - case CALL: { int count; @@ -1966,31 +1960,35 @@ subst_stack_regs_pat (rtx_insn *insn, stack_ptr regstack, rtx pat) replace_reg (src2, FIRST_STACK_REG + 1); break; - case UNSPEC_SAHF: - /* (unspec [(unspec [(compare)] UNSPEC_FNSTSW)] UNSPEC_SAHF) - The combination matches the PPRO fcomi instruction. */ - - pat_src = XVECEXP (pat_src, 0, 0); - gcc_assert (GET_CODE (pat_src) == UNSPEC); - gcc_assert (XINT (pat_src, 1) == UNSPEC_FNSTSW); - /* Fall through. */ - case UNSPEC_FNSTSW: /* Combined fcomp+fnstsw generated for doing well with CSE. When optimizing this would have been broken up before now. */ pat_src = XVECEXP (pat_src, 0, 0); - gcc_assert (GET_CODE (pat_src) == COMPARE); + if (GET_CODE (pat_src) == COMPARE) + goto do_compare; - compare_for_stack_reg (insn, regstack, pat_src, true); - break; + /* Fall through. */ + + case UNSPEC_NOTRAP: + + pat_src = XVECEXP (pat_src, 0, 0); + gcc_assert (GET_CODE (pat_src) == COMPARE); + goto do_compare; default: gcc_unreachable (); } break; + case COMPARE: + do_compare: + /* `fcomi' insn can't pop two regs. */ + compare_for_stack_reg (insn, regstack, pat_src, + REGNO (*dest) != FLAGS_REG); + break; + case IF_THEN_ELSE: /* This insn requires the top of stack to be the destination. */ |