[Bug target/100152] Possible 10.3 bad code generation regression from 10.2/9.3 on Mac OS 10.15.7 (Catalina)

[lucier at math dot purdue.edu via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100152

--- Comment #13 from lucier at math dot purdue.edu ---
(In reply to Iain Sandoe from comment #8)
> the values of rbp. r10 and esi would be interesting too.

I'm not really familiar with assembler, don't know what register esi is, here's
what lldb says:

(lldb) register read -a
General Purpose Registers:
       rax = 0x00007fff924cfba8  sGlobalMutex + 32
       rbx = 0x0000000000000001
       rcx = 0x000000010426ef90  libgambit.dylib`___gstate0 + 752
       rdx = 0x000000010426eca0  libgambit.dylib`___gstate0
       rdi = 0x00007ffeebed73d8
       rsi = 0x000000000000002f
       rbp = 0x00007fa600595ec0
       rsp = 0x00007ffeebed73d0
        r8 = 0x000000000000045c
        r9 = 0x0000000000000462
       r10 = 0x00007fff924cfba9  sGlobalMutex + 33
       r11 = 0x0000000103d5c920  libgambit.dylib`___UTF_8_put at c_intf.c:407:6
       r12 = 0x0000000000000042
       r13 = 0x00007ffeebed7428
       r14 = 0x000000010426eca0  libgambit.dylib`___gstate0
       r15 = 0x00000000000006d8
       rip = 0x0000000103d60010  libgambit.dylib`___SCMOBJ_to_NONNULLSTRING +
1520 at c_intf.c:3280:173
    rflags = 0x0000000000010206
        cs = 0x000000000000002b
        fs = 0x0000000000000000
        gs = 0x0000000000000000

Floating Point Registers:
       fcw = 0x0005
       fsw = 0x0000
       ftw = 0x83
       fop = 0x0000
        ip = 0x25ff5699
        cs = 0x8670
        dp = 0x0000027f
        ds = 0x0000
     mxcsr = 0x00000000
  mxcsrmask = 0x00000000
     stmm0 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0xa0 0x1f}
     stmm1 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0xff 0xff}
     stmm2 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
     stmm3 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
     stmm4 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
     stmm5 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00}
     stmm6 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0xff 0xff}
     stmm7 = {0xc8 0x5f 0x59 0x02 0x00 0x00 0x00 0x00 0xff 0xff}
      xmm0 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00}
      xmm1 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00}
      xmm2 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00}
      xmm3 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00}
      xmm4 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00}
      xmm5 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00}
      xmm6 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00}
      xmm7 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00}
      xmm8 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00}
      xmm9 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00}
     xmm10 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00}
     xmm11 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00}
     xmm12 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00}
     xmm13 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00}
     xmm14 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00}
     xmm15 = {0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00}

Exception State Registers:
    trapno = 0x00000000
       err = 0x00000000
  faultvaddr = 0x0000000000000000