diff options
Diffstat (limited to 'gcc/builtins.c')
| -rw-r--r-- | gcc/builtins.c | 43 |
1 files changed, 1 insertions, 42 deletions
diff --git a/gcc/builtins.c b/gcc/builtins.c index b3fc304..57d9379 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -1945,48 +1945,7 @@ expand_builtin_mathfn (tree exp, rtx target, rtx subtarget) before_call = get_last_insn (); - target = expand_call (exp, target, target == const0_rtx); - - /* If this is a sqrt operation and we don't care about errno, try to - attach a REG_EQUAL note with a SQRT rtx to the emitted libcall. - This allows the semantics of the libcall to be visible to the RTL - optimizers. */ - if (builtin_optab == sqrt_optab && !errno_set) - { - /* Search backwards through the insns emitted by expand_call looking - for the instruction with the REG_RETVAL note. */ - rtx last = get_last_insn (); - while (last != before_call) - { - if (find_reg_note (last, REG_RETVAL, NULL)) - { - rtx note = find_reg_note (last, REG_EQUAL, NULL); - /* Check that the REQ_EQUAL note is an EXPR_LIST with - two elements, i.e. symbol_ref(sqrt) and the operand. */ - if (note - && GET_CODE (note) == EXPR_LIST - && GET_CODE (XEXP (note, 0)) == EXPR_LIST - && XEXP (XEXP (note, 0), 1) != NULL_RTX - && XEXP (XEXP (XEXP (note, 0), 1), 1) == NULL_RTX) - { - rtx operand = XEXP (XEXP (XEXP (note, 0), 1), 0); - /* Check operand is a register with expected mode. */ - if (operand - && REG_P (operand) - && GET_MODE (operand) == mode) - { - /* Replace the REG_EQUAL note with a SQRT rtx. */ - rtx equiv = gen_rtx_SQRT (mode, operand); - set_unique_reg_note (last, REG_EQUAL, equiv); - } - } - break; - } - last = PREV_INSN (last); - } - } - - return target; + return expand_call (exp, target, target == const0_rtx); } /* Expand a call to the builtin binary math functions (pow and atan2). |