The following patch fixes this bug
Testing in progress
diff --git a/gcc/config/aarch64/aarch64.md b/gcc/config/aarch64/aarch64.md
index b5be79c..ed6e602 100644
--- a/gcc/config/aarch64/aarch64.md
+++ b/gcc/config/aarch64/aarch64.md
@@ -4026,7 +4026,7 @@
})
(define_insn "stack_protect_test_<mode>"
- [(set (match_operand:PTR 0 "register_operand")
+ [(set (match_operand:PTR 0 "register_operand" "=r")
(unspec:PTR [(match_operand:PTR 1 "memory_operand" "m")
(match_operand:PTR 2 "memory_operand" "m")]
UNSPEC_SP_TEST))
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https://bugs.launchpad.net/bugs/1364979
Title:
fbb ftbfs on arm64
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