1; RUN: llc -mtriple=x86_64-unknown-linux < %s | FileCheck -check-prefix X8664 %s 2; RUN: llc -mtriple=i686-unknown-linux < %s | FileCheck -check-prefix X8632 %s 3; Check that all callee-saved registers are saved and restored in functions 4; that call __builtin_unwind_init(). This is its undocumented behavior in gcc, 5; and it is used in compiling libgcc_eh. 6; See also PR8541 7 8declare void @llvm.eh.unwind.init() 9 10define void @calls_unwind_init() { 11 call void @llvm.eh.unwind.init() 12 ret void 13} 14 15; X8664-LABEL: calls_unwind_init: 16; X8664: pushq %rbp 17; X8664: pushq %r15 18; X8664: pushq %r14 19; X8664: pushq %r13 20; X8664: pushq %r12 21; X8664: pushq %rbx 22; X8664: popq %rbx 23; X8664: popq %r12 24; X8664: popq %r13 25; X8664: popq %r14 26; X8664: popq %r15 27 28; X8632-LABEL: calls_unwind_init: 29; X8632: pushl %ebp 30; X8632: pushl %ebx 31; X8632: pushl %edi 32; X8632: pushl %esi 33; X8632: popl %esi 34; X8632: popl %edi 35; X8632: popl %ebx 36; X8632: popl %ebp 37