https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110946
--- Comment #6 from Dave Rodgman ---
Under clang, we see that mbedtls_xor being inlined, or not, causes an
equivalent perf difference. Note that mbedtls_xor is inline in the gcc O2
version and not in the gcc Os version.
Not inline mbedtls_xor,
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110946
--- Comment #5 from Dave Rodgman ---
(In reply to Richard Biener from comment #3)
> Note you shouldn't use -Os if you care about performance. GCC is quite
> reasonable with code size increases at -O2 (as compared to other compilers).
> Instead
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110946
Dave Rodgman changed:
What|Removed |Added
Keywords|missed-optimization |
Component|ipa
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110946
--- Comment #1 from Dave Rodgman ---
Disassembly under -Os:
139c :
139c: a9b67bfdstp x29, x30, [sp, #-160]!
13a0: 910003fdmov x29, sp
13a4: a9046bf9stp x25, x26, [sp,
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110946
Bug ID: 110946
Summary: 3x perf regression with -Os on M1 Pro
Product: gcc
Version: 12.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
