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 ; RUN: llc < %s -mtriple=x86_64-apple-darwin -O0 | FileCheck %s --check-prefix=CHECK-O0
8 %struct.S = type { i8 }
10 @sg = internal thread_local global %struct.S zeroinitializer, align 1
11 @__dso_handle = external global i8
12 @__tls_guard = internal thread_local unnamed_addr global i1 false
13 @sum1 = internal thread_local global i32 0, align 4
15 declare void @_ZN1SC1Ev(%struct.S*)
16 declare void @_ZN1SD1Ev(%struct.S*)
17 declare i32 @_tlv_atexit(void (i8*)*, i8*, i8*)
19 ; Every GPR should be saved - except rdi, rax, and rsp
20 ; CHECK-LABEL: _ZTW2sg
21 ; CHECK-NOT: pushq %r11
22 ; CHECK-NOT: pushq %r10
23 ; CHECK-NOT: pushq %r9
24 ; CHECK-NOT: pushq %r8
25 ; CHECK-NOT: pushq %rsi
26 ; CHECK-NOT: pushq %rdx
27 ; CHECK-NOT: pushq %rcx
28 ; CHECK-NOT: pushq %rbx
34 ; CHECK-NOT: popq %rbx
35 ; CHECK-NOT: popq %rcx
36 ; CHECK-NOT: popq %rdx
37 ; CHECK-NOT: popq %rsi
40 ; CHECK-NOT: popq %r10
41 ; CHECK-NOT: popq %r11
42 define cxx_fast_tlscc nonnull %struct.S* @_ZTW2sg() nounwind {
43 %.b.i = load i1, i1* @__tls_guard, align 1
44 br i1 %.b.i, label %__tls_init.exit, label %init.i
47 store i1 true, i1* @__tls_guard, align 1
48 tail call void @_ZN1SC1Ev(%struct.S* nonnull @sg) #2
49 %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
50 br label %__tls_init.exit
56 ; CHECK-LABEL: _ZTW4sum1
57 ; CHECK-NOT: pushq %r11
58 ; CHECK-NOT: pushq %r10
59 ; CHECK-NOT: pushq %r9
60 ; CHECK-NOT: pushq %r8
61 ; CHECK-NOT: pushq %rsi
62 ; CHECK-NOT: pushq %rdx
63 ; CHECK-NOT: pushq %rcx
64 ; CHECK-NOT: pushq %rbx
66 define cxx_fast_tlscc nonnull i32* @_ZTW4sum1() nounwind {
70 ; Make sure at O0 we don't overwrite RBP.
71 ; CHECK-O0-LABEL: _ZTW4sum2
72 ; CHECK-O0: pushq %rbp
73 ; CHECK-O0: movq %rsp, %rbp
74 ; CHECK-O0-NOT: movq %r{{.*}}, (%rbp)
75 define cxx_fast_tlscc i32* @_ZTW4sum2() #0 {
79 attributes #0 = { nounwind "no-frame-pointer-elim"="true" }