https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81763
--- Comment #26 from Mike Lothian <mike at fireburn dot co.uk> ---
Is this the patch you want us to test then:
diff -ur a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
--- a/gcc/config/i386/i386.md 2018-01-16 11:17:49.509247000 +0000
+++ b/gcc/config/i386/i386.md 2018-01-25 18:21:25.562225621 +0000
@@ -8586,7 +8586,7 @@
(define_insn "*andndi3_doubleword"
[(set (match_operand:DI 0 "register_operand" "=r,&r")
(and:DI
- (not:DI (match_operand:DI 1 "register_operand" "r,0"))
+ (not:DI (match_operand:DI 1 "register_operand" "0,0"))
(match_operand:DI 2 "nonimmediate_operand" "rm,rm")))
(clobber (reg:CC FLAGS_REG))]
"!TARGET_64BIT && TARGET_STV && TARGET_SSE2"
