https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67487
--- Comment #2 from mazen....@uni-ulm.de --- The node I was trying to compile the program at uses an AMD Opteron with the x86-64 instruction set. I listed the detailed CPU information below, in case it is useful. Here is the backtrace and disassembly. (gdb) bt #0 0x00000000010d7fa8 in __gmpn_popcount () #1 0x00000000010bfa94 in parsed_string_to_mpfr () #2 0x00000000010c0311 in mpfr_strtofr () #3 0x0000000000a1bb8e in real_from_string(real_value*, char const*) () #4 0x0000000000a1c5dd in real_from_string3(real_value*, char const*, machine_mode) () #5 0x000000000073c024 in interpret_float(cpp_token const*, unsigned int, char const*, overflow_type*) () #6 0x000000000073cccd in c_lex_with_flags(tree_node**, unsigned int*, unsigned char*, int) () #7 0x000000000065ff40 in cp_lexer_get_preprocessor_token(cp_lexer*, cp_token*) () #8 0x000000000068ee89 in c_parse_file() () #9 0x00000000007418a3 in c_common_parse_file() () #10 0x0000000000aa0f32 in compile_file() () #11 0x0000000000aa2c1f in toplev::main(int, char**) () #12 0x000000000103418a in main () (gdb) disassemble Dump of assembler code for function __gmpn_popcount: 0x00000000010d7f40 <+0>: lea (%rdi,%rsi,8),%rdi 0x00000000010d7f44 <+4>: imul $0xffffffff,%esi,%ecx 0x00000000010d7f47 <+7>: and $0x7,%ecx 0x00000000010d7f4a <+10>: neg %rsi 0x00000000010d7f4d <+13>: mov %ecx,%eax 0x00000000010d7f4f <+15>: neg %rax 0x00000000010d7f52 <+18>: lea (%rdi,%rax,8),%rdi 0x00000000010d7f56 <+22>: xor %eax,%eax 0x00000000010d7f58 <+24>: lea (%rcx,%rcx,4),%rcx 0x00000000010d7f5c <+28>: lea 0x1d(%rip),%rdx # 0x10d7f80 <__gmpn_popcount+64> 0x00000000010d7f63 <+35>: lea (%rdx,%rcx,2),%rdx 0x00000000010d7f67 <+39>: jmpq *%rdx 0x00000000010d7f69 <+41>: nopl 0x0(%rax,%rax,1) 0x00000000010d7f71 <+49>: data16 data16 data16 data16 data16 nopw %cs:0x0(%rax,%rax,1) 0x00000000010d7f80 <+64>: popcnt 0x0(%rdi,%rsi,8),%r8 0x00000000010d7f87 <+71>: add %r8,%rax 0x00000000010d7f8a <+74>: popcnt 0x8(%rdi,%rsi,8),%r9 0x00000000010d7f91 <+81>: add %r9,%rax 0x00000000010d7f94 <+84>: popcnt 0x10(%rdi,%rsi,8),%r8 0x00000000010d7f9b <+91>: add %r8,%rax 0x00000000010d7f9e <+94>: popcnt 0x18(%rdi,%rsi,8),%r9 0x00000000010d7fa5 <+101>: add %r9,%rax => 0x00000000010d7fa8 <+104>: popcnt 0x20(%rdi,%rsi,8),%r8 0x00000000010d7faf <+111>: add %r8,%rax 0x00000000010d7fb2 <+114>: popcnt 0x28(%rdi,%rsi,8),%r9 0x00000000010d7fb9 <+121>: add %r9,%rax 0x00000000010d7fbc <+124>: popcnt 0x30(%rdi,%rsi,8),%r8 0x00000000010d7fc3 <+131>: add %r8,%rax 0x00000000010d7fc6 <+134>: popcnt 0x38(%rdi,%rsi,8),%r9 0x00000000010d7fcd <+141>: add %r9,%rax 0x00000000010d7fd0 <+144>: add $0x8,%rsi 0x00000000010d7fd4 <+148>: js 0x10d7f80 <__gmpn_popcount+64> 0x00000000010d7fd6 <+150>: retq End of assembler dump. Here is the CPU info. processor : 0 vendor_id : AuthenticAMD cpu family : 15 model : 37 model name : AMD Opteron(tm) Processor 252 stepping : 1 cpu MHz : 2611.975 cache size : 1024 KB physical id : 0 siblings : 1 core id : 0 cpu cores : 1 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext fxsr_opt lm 3dnowext 3dnow rep_good extd_apicid pni lahf_lm bogomips : 5223.95 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: ts fid vid ttp processor : 1 vendor_id : AuthenticAMD cpu family : 15 model : 37 model name : AMD Opteron(tm) Processor 252 stepping : 1 cpu MHz : 2611.975 cache size : 1024 KB physical id : 1 siblings : 1 core id : 0 cpu cores : 1 apicid : 1 initial apicid : 1 fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext fxsr_opt lm 3dnowext 3dnow rep_good extd_apicid pni lahf_lm bogomips : 5222.97 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: ts fid vid ttp
