diff options
Diffstat (limited to 'gcc/combine.cc')
| -rw-r--r-- | gcc/combine.cc | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/gcc/combine.cc b/gcc/combine.cc index e118608..873c2bd 100644 --- a/gcc/combine.cc +++ b/gcc/combine.cc @@ -5280,6 +5280,12 @@ find_split_point (rtx *loc, rtx_insn *insn, bool set_src) SUBST (XEXP (x, 0), XEXP (x, 1)); SUBST (XEXP (x, 1), tem); } + /* Many targets have a `(and (not X) Y)` and/or `(ior (not X) Y)` instructions. + Split at that insns. However if this is + the SET_SRC, we likely do not have such an instruction and it's + worthless to try this split. */ + if (!set_src && GET_CODE (XEXP (x, 0)) == NOT) + return loc; break; case PLUS: |