https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67591
Bug ID: 67591
Summary: ARM v8 Thumb IT blocks deprecated
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: clyon at gcc dot gnu.org
Target Milestone: ---
Target: ARM
Conditional compare patterns in the arm backend have not been adjusted for the
-mrestrict-it rules, which leads to gas warning messages such as:
IT blocks containing 32-bit Thumb instructions are deprecated in ARMv8.
For instance, it happens in
libstdc++/testsuite/21_strings/basic_string/allocator/char/minimal.cc
when GCC is configured:
--target arm-none-linux-gnueabihf
--with-mode thumb
--with-cpu cortex-a57
--with-fpu crypto-neon-fp-armv8
