The transparent call insns like "*parityhi2.libgcc" output a single
[R]CALL instruction that can be skipped by the skip instructions.
Such insns have attribute "type" of "xcall" and can therefore
be easily recognized.
Ok for trunk?
Johann
--
AVR: Detect more skip opportunities.
The transparent call insns like "*parityhi2.libgcc" output a single
[R]CALL instruction that can be skipped by the skip instructions.
Such insns have attribute "type" of "xcall" and can therefore
be easily recognized. Same applies when "adjust_len" is "call".
gcc/
* config/avr/avr.cc (avr_2word_insn_p): Return true for
transparent calls: When insn attribute "type" is "xcall"
or when "adjust_len" is "call".
diff --git a/gcc/config/avr/avr.cc b/gcc/config/avr/avr.cc
index 48d1d0e7646..ef7e94dde2b 100644
--- a/gcc/config/avr/avr.cc
+++ b/gcc/config/avr/avr.cc
@@ -12986,7 +12986,10 @@ avr_2word_insn_p (rtx_insn *insn)
switch (INSN_CODE (insn))
{
default:
- return false;
+ return (recog_memoized (insn) >= 0
+ // Transparent calls may be skipped.
+ && (get_attr_type (insn) == TYPE_XCALL
+ || get_attr_adjust_len (insn) == ADJUST_LEN_CALL));
case CODE_FOR_movqi_insn:
case CODE_FOR_movuqq_insn:
