https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109883
--- Comment #5 from Xi Ruoyao <xry111 at gcc dot gnu.org> --- 0000000000001203 <_ZSt3powIDF64_DF64_EN9__gnu_cxx11__promote_2IDTplcvNS1_IT_XsrSt12__is_integerIS2_E7__valueEE6__typeELi0EcvNS1_IT0_XsrS3_IS7_E7__valueEE6__typeELi0EEXsrS3_ISB_E7__valueEE6__typeES2_S7_>: 1203: 55 push %rbp 1204: 48 89 e5 mov %rsp,%rbp 1207: 48 83 ec 10 sub $0x10,%rsp 120b: f2 0f 11 45 f8 movsd %xmm0,-0x8(%rbp) 1210: f2 0f 11 4d f0 movsd %xmm1,-0x10(%rbp) 1215: f2 0f 10 45 f0 movsd -0x10(%rbp),%xmm0 121a: 48 8b 45 f8 mov -0x8(%rbp),%rax 121e: 66 0f 28 c8 movapd %xmm0,%xmm1 1222: 66 48 0f 6e c0 movq %rax,%xmm0 1227: e8 d7 ff ff ff call 1203 <_ZSt3powIDF64_DF64_EN9__gnu_cxx11__promote_2IDTplcvNS1_IT_XsrSt12__is_integerIS2_E7__valueEE6__typeELi0EcvNS1_IT0_XsrS3_IS7_E7__valueEE6__typeELi0EEXsrS3_ISB_E7__valueEE6__typeES2_S7_> 122c: 66 48 0f 7e c0 movq %xmm0,%rax 1231: 66 48 0f 6e c0 movq %rax,%xmm0 1236: c9 leave 1237: c3 ret This is just stupid...