https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102473
--- Comment #13 from Hongtao.liu <crazylht at gmail dot com> --- (In reply to H.J. Lu from comment #12) > Are glibc regressions real? Please show the affected glibc assembly codes > before and after. Assembly codes is the same, but DSB coverage drop down. before my commit front-end bound of libc-2.31.so is 1.2%, after my commit front-end bound raise up to 21.9%, use -falign-functions=64 doesn't help. The below code is copy from one of libc functions which has big front-end bounds 0x5f741 0 Block 123: 0x5f741 0 jz 0x607b0 <Block 379> 0 0x5f747 0 Block 124: 0x5f747 0 movq -0x78(%rbp), %rdx 0 0x5f74b 0 Block 125: 0x5f74b 0 sub $0x1, %r14d 130500000 0x5f74f 0 cmp %rbx, %r15 0x5f752 0 jz 0x5f813 <Block 135> 0x5f758 0 Block 126: 0x5f758 0 movl -0x98(%rbp), %ecx 0 0x5f75e 0 Block 127: 0x5f75e 0 movl -0x8(%r15), %eax 29000000 0x5f762 0 sub $0x18, %r15 203000000 0x5f766 0 add %r12d, %eax 0 0x5f769 0 sub $0x1, %eax 58000000 0x5f76c 0 cmp %ecx, %eax 159500000 0x5f76e 0 jnle 0x5f74b <Block 125> 0 0x5f770 0 Block 128: 0x5f770 0 movq -0x70(%rbp), %rdi 43500000 0x5f774 0 test %rdx, %rdx 29000000 0x5f777 0 jz 0x5f700 <Block 119>
