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1; Testcase generated from the following code:
2; extern __thread int i;
3; void f();
4; int g(void) {
5;   if (i) {
6;     i = 0;
7;     f();
8;   }
9;   return i;
10; }
11; We want to make sure that TLS variables are not accessed before
12; the stack frame is set up.
13
14; RUN: llc < %s -relocation-model=pic | FileCheck %s
15
16target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
17target triple = "x86_64-unknown-freebsd11.0"
18
19@i = external thread_local global i32, align 4
20
21define i32 @g() #0 {
22entry:
23  %tmp = load i32, i32* @i, align 4
24  %tobool = icmp eq i32 %tmp, 0
25  br i1 %tobool, label %if.end, label %if.then
26
27if.then:                                          ; preds = %entry
28  store i32 0, i32* @i, align 4
29  tail call void (...) @f() #2
30  %.pre = load i32, i32* @i, align 4
31  br label %if.end
32
33if.end:                                           ; preds = %if.then, %entry
34  %tmp1 = phi i32 [ 0, %entry ], [ %.pre, %if.then ]
35  ret i32 %tmp1
36}
37
38; CHECK: g:                                      # @g
39; CHECK-NEXT:         .cfi_startproc
40; CHECK-NEXT: # BB#0:                                 # %entry
41; CHECK-NEXT:         pushq   %rbp
42; CHECK-NEXT: .Ltmp0:
43; CHECK-NEXT:         .cfi_def_cfa_offset 16
44; CHECK-NEXT: .Ltmp1:
45; CHECK-NEXT:         .cfi_offset %rbp, -16
46; CHECK-NEXT:         movq    %rsp, %rbp
47; CHECK-NEXT: .Ltmp2:
48; CHECK-NEXT:         .cfi_def_cfa_register %rbp
49; CHECK-NEXT:         pushq   %rbx
50; CHECK-NEXT:         pushq   %rax
51; CHECK-NEXT: .Ltmp3:
52; CHECK-NEXT:         .cfi_offset %rbx, -24
53; CHECK-NEXT:         data16
54; CHECK-NEXT:         leaq    i@TLSGD(%rip), %rdi
55
56declare void @f(...) #1
57
58attributes #0 = { nounwind uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
59attributes #1 = { "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
60attributes #2 = { nounwind }
61