1 ; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s
2 ; TLS function were wrongly model and after fixing that, shrink-wrapping
3 ; cannot help here. To achieve the expected lowering, we need to playing
4 ; tricks similar to AArch64 fast TLS calling convention (r255821).
5 ; Applying tricks on x86-64 similar to r255821.
6 ; RUN: llc < %s -mtriple=x86_64-apple-darwin -enable-shrink-wrap=true | FileCheck %s
7 %struct.S = type { i8 }
9 @sg = internal thread_local global %struct.S zeroinitializer, align 1
10 @__dso_handle = external global i8
11 @__tls_guard = internal thread_local unnamed_addr global i1 false
13 declare void @_ZN1SC1Ev(%struct.S*)
14 declare void @_ZN1SD1Ev(%struct.S*)
15 declare i32 @_tlv_atexit(void (i8*)*, i8*, i8*)
17 ; Every GPR should be saved - except rdi, rax, and rsp
18 ; CHECK-LABEL: _ZTW2sg
19 ; CHECK-NOT: pushq %r11
20 ; CHECK-NOT: pushq %r10
21 ; CHECK-NOT: pushq %r9
22 ; CHECK-NOT: pushq %r8
23 ; CHECK-NOT: pushq %rsi
24 ; CHECK-NOT: pushq %rdx
25 ; CHECK-NOT: pushq %rcx
26 ; CHECK-NOT: pushq %rbx
32 ; CHECK-NOT: popq %rbx
33 ; CHECK-NOT: popq %rcx
34 ; CHECK-NOT: popq %rdx
35 ; CHECK-NOT: popq %rsi
38 ; CHECK-NOT: popq %r10
39 ; CHECK-NOT: popq %r11
40 define cxx_fast_tlscc nonnull %struct.S* @_ZTW2sg() nounwind {
41 %.b.i = load i1, i1* @__tls_guard, align 1
42 br i1 %.b.i, label %__tls_init.exit, label %init.i
45 store i1 true, i1* @__tls_guard, align 1
46 tail call void @_ZN1SC1Ev(%struct.S* nonnull @sg) #2
47 %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
48 br label %__tls_init.exit