This cures an unrecognizable insn ICE by modifying a predicate of
extenddftf2_internal (the only place this predicate is used) to ensure
that rtl optimization passes do not substitute 0.0 for a register with
known 0.0 value, except when VSX is enabled. ie. Don't undo the
necessary register move emitted by the extenddftf2_fprs expander.
Bootstrapped and regression tested powerpc64le-linux, powerpc64-linux
and powerpc-linux. OK to apply?
PR target/65576
PR target/65240
* config/rs6000/predicates.md (zero_reg_mem_operand): Exclude
0.0 constant unless TARGET_VSX.
Index: gcc/config/rs6000/predicates.md
===================================================================
--- gcc/config/rs6000/predicates.md (revision 221805)
+++ gcc/config/rs6000/predicates.md (working copy)
@@ -964,7 +964,8 @@
;; Return 1 if the operand is CONST_DOUBLE 0, register or memory operand.
(define_predicate "zero_reg_mem_operand"
- (ior (match_operand 0 "zero_fp_constant")
+ (ior (and (match_test "TARGET_VSX")
+ (match_operand 0 "zero_fp_constant"))
(match_operand 0 "reg_or_mem_operand")))
;; Return 1 if the operand is a CONST_INT and it is the element for 64-bit
--
Alan Modra
Australia Development Lab, IBM
