; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s ; RUN: llc < %s -mtriple=x86_64-apple-darwin -enable-shrink-wrap=true | FileCheck --check-prefix=SHRINK %s %struct.S = type { i8 } @sg = internal thread_local global %struct.S zeroinitializer, align 1 @__dso_handle = external global i8 @__tls_guard = internal thread_local unnamed_addr global i1 false declare void @_ZN1SC1Ev(%struct.S*) declare void @_ZN1SD1Ev(%struct.S*) declare i32 @_tlv_atexit(void (i8*)*, i8*, i8*) ; Every GPR should be saved - except rdi, rax, and rsp ; CHECK-LABEL: _ZTW2sg ; CHECK: pushq %r11 ; CHECK: pushq %r10 ; CHECK: pushq %r9 ; CHECK: pushq %r8 ; CHECK: pushq %rsi ; CHECK: pushq %rdx ; CHECK: pushq %rcx ; CHECK: pushq %rbx ; CHECK: callq ; CHECK: jne ; CHECK: callq ; CHECK: tlv_atexit ; CHECK: callq ; CHECK: popq %rbx ; CHECK: popq %rcx ; CHECK: popq %rdx ; CHECK: popq %rsi ; CHECK: popq %r8 ; CHECK: popq %r9 ; CHECK: popq %r10 ; CHECK: popq %r11 ; SHRINK-LABEL: _ZTW2sg ; SHRINK: callq ; SHRINK: jne ; SHRINK: pushq %r11 ; SHRINK: pushq %r10 ; SHRINK: pushq %r9 ; SHRINK: pushq %r8 ; SHRINK: pushq %rsi ; SHRINK: pushq %rdx ; SHRINK: pushq %rcx ; SHRINK: pushq %rbx ; SHRINK: callq ; SHRINK: tlv_atexit ; SHRINK: popq %rbx ; SHRINK: popq %rcx ; SHRINK: popq %rdx ; SHRINK: popq %rsi ; SHRINK: popq %r8 ; SHRINK: popq %r9 ; SHRINK: popq %r10 ; SHRINK: popq %r11 ; SHRINK: LBB{{.*}}: ; SHRINK: callq define cxx_fast_tlscc nonnull %struct.S* @_ZTW2sg() { %.b.i = load i1, i1* @__tls_guard, align 1 br i1 %.b.i, label %__tls_init.exit, label %init.i init.i: store i1 true, i1* @__tls_guard, align 1 tail call void @_ZN1SC1Ev(%struct.S* nonnull @sg) #2 %1 = tail call i32 @_tlv_atexit(void (i8*)* nonnull bitcast (void (%struct.S*)* @_ZN1SD1Ev to void (i8*)*), i8* nonnull getelementptr inbounds (%struct.S, %struct.S* @sg, i64 0, i32 0), i8* nonnull @__dso_handle) #2 br label %__tls_init.exit __tls_init.exit: ret %struct.S* @sg }