https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105991
Roger Sayle <roger at nextmovesoftware dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Ever confirmed|0 |1 Last reconfirmed| |2022-06-16 CC| |roger at nextmovesoftware dot com Keywords| |patch Status|UNCONFIRMED |NEW --- Comment #1 from Roger Sayle <roger at nextmovesoftware dot com> --- The following patch appears to correct this for me on a cross-compiler to powerpcle64, but it's tricky for me to do a full bootstrap/regression test. 2022-06-16 Roger Sayle <ro...@nextmovesoftware.com> gcc/ChangeLog PR target/105991 * config/rs6000/rs6000.md (plus_xor): New code iterator. (*rotl<mode>3_insert_3_<code>): New define_insn_and_split. diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md index c55ee7e..695ec33 100644 --- a/gcc/config/rs6000/rs6000.md +++ b/gcc/config/rs6000/rs6000.md @@ -4188,6 +4188,23 @@ } [(set_attr "type" "insert")]) +; Canonicalize the PLUS and XOR forms to IOR for rotl<mode>3_insert_3 +(define_code_iterator plus_xor [plus xor]) + +(define_insn_and_split "*rotl<mode>3_insert_3_<code>" + [(set (match_operand:GPR 0 "gpc_reg_operand" "=r") + (plus_xor:GPR + (and:GPR (match_operand:GPR 3 "gpc_reg_operand" "0") + (match_operand:GPR 4 "const_int_operand" "n")) + (ashift:GPR (match_operand:GPR 1 "gpc_reg_operand" "r") + (match_operand:SI 2 "const_int_operand" "n"))))] + "INTVAL (operands[2]) == exact_log2 (UINTVAL (operands[4]) + 1)" + "#" + "&& 1" + [(set (match_dup 0) + (ior:GPR (and:GPR (match_dup 3) (match_dup 4)) + (ashift:GPR (match_dup 1) (match_dup 2))))]) + (define_code_iterator plus_ior_xor [plus ior xor]) (define_split