| ; RUN: llc -mtriple=x86_64-unknown-linux < %s | FileCheck -check-prefix X8664 %s |
| ; RUN: llc -mtriple=i686-unknown-linux < %s | FileCheck -check-prefix X8632 %s |
| ; Check that all callee-saved registers are saved and restored in functions |
| ; that call __builtin_unwind_init(). This is its undocumented behavior in gcc, |
| ; and it is used in compiling libgcc_eh. |
| ; See also PR8541 |
| |
| declare void @llvm.eh.unwind.init() |
| |
| define void @calls_unwind_init() { |
| call void @llvm.eh.unwind.init() |
| ret void |
| } |
| |
| ; X8664-LABEL: calls_unwind_init: |
| ; X8664: pushq %rbp |
| ; X8664: pushq %r15 |
| ; X8664: pushq %r14 |
| ; X8664: pushq %r13 |
| ; X8664: pushq %r12 |
| ; X8664: pushq %rbx |
| ; X8664: popq %rbx |
| ; X8664: popq %r12 |
| ; X8664: popq %r13 |
| ; X8664: popq %r14 |
| ; X8664: popq %r15 |
| |
| ; X8632-LABEL: calls_unwind_init: |
| ; X8632: pushl %ebp |
| ; X8632: pushl %ebx |
| ; X8632: pushl %edi |
| ; X8632: pushl %esi |
| ; X8632: popl %esi |
| ; X8632: popl %edi |
| ; X8632: popl %ebx |
| ; X8632: popl %ebp |