Some of my future patches for prefixed memory instructions in a future PowerPC processor need the following tweak to the ISA attribute, so that the alternative that uses a prefixed instruction to load up large integer constants can be eliminated if the user does not compile for the 'future' target.
I have bootstrapped the compiler and run make check with no regressions. Can I check this into the trunk? 2019-06-17 Michael Meissner <meiss...@linux.ibm.com> * config/rs6000/rs6000.md (isa attribute): Add support for prefixed instructions. Index: gcc/config/rs6000/rs6000.md =================================================================== --- gcc/config/rs6000/rs6000.md (revision 272270) +++ gcc/config/rs6000/rs6000.md (working copy) @@ -267,7 +267,9 @@ (define_attr "cpu" (const (symbol_ref "(enum attr_cpu) rs6000_tune"))) ;; The ISA we implement. -(define_attr "isa" "any,p5,p6,p7,p7v,p8v,p9v,p9kf,p9tf" (const_string "any")) +(define_attr "isa" + "any,p5,p6,p7,p7v,p8v,p9v,p9kf,p9tf,prefix" + (const_string "any")) ;; Is this alternative enabled for the current CPU/ISA/etc.? (define_attr "enabled" "" @@ -306,6 +308,10 @@ (define_attr "enabled" "" (and (eq_attr "isa" "p9tf") (match_test "FLOAT128_VECTOR_P (TFmode)")) (const_int 1) + + (and (eq_attr "isa" "prefix") + (match_test "TARGET_PREFIXED_ADDR")) + (const_int 1) ] (const_int 0))) ;; If this instruction is microcoded on the CELL processor -- Michael Meissner, IBM IBM, M/S 2506R, 550 King Street, Littleton, MA 01460-6245, USA email: meiss...@linux.ibm.com, phone: +1 (978) 899-4797