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Diffstat (limited to 'test/CodeGen/X86/unwind-init.ll')
| -rw-r--r-- | test/CodeGen/X86/unwind-init.ll | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/test/CodeGen/X86/unwind-init.ll b/test/CodeGen/X86/unwind-init.ll new file mode 100644 index 000000000000..d0915e244eeb --- /dev/null +++ b/test/CodeGen/X86/unwind-init.ll @@ -0,0 +1,36 @@ +; 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 |