All
Currently using the match_scratch predicate on a destination operand will
trigger the warning
"warning: destination operand 0 allows non-lvalue",
This happends because add_predicate_code() will set the
pred->allows_non_lvalue when
it encounters a SCRATCH rtx code which subsequently triggers the above genrecog
warning/
Graham
gcc/ChangeLog
* gensupport.c:: (add_predicate_code) Also exclude SCRATCH from rtx codes
which allow
non-lvalues.
Index: gcc/gensupport.c
=========================================
--- gcc/gensupport.c (revision 198200)
+++ gcc/gensupport.c (working copy)
@@ -2732,7 +2732,8 @@
&& code != MEM
&& code != CONCAT
&& code != PARALLEL
- && code != STRICT_LOW_PART)
+ && code != STRICT_LOW_PART
+ && code != SCRATCH)
pred->allows_non_lvalue = true;
if (pred->num_codes == 1)
