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| ; Testcase generated from the following code:
; extern __thread int i;
; void f();
; int g(void) {
; if (i) {
; i = 0;
; f();
; }
; return i;
; }
; We want to make sure that TLS variables are not accessed before
; the stack frame is set up.
; RUN: llc < %s -relocation-model=pic | FileCheck %s
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-freebsd11.0"
@i = external thread_local global i32, align 4
define i32 @g() #0 {
entry:
%tmp = load i32, i32* @i, align 4
%tobool = icmp eq i32 %tmp, 0
br i1 %tobool, label %if.end, label %if.then
if.then: ; preds = %entry
store i32 0, i32* @i, align 4
tail call void (...) @f() #2
%.pre = load i32, i32* @i, align 4
br label %if.end
if.end: ; preds = %if.then, %entry
%tmp1 = phi i32 [ 0, %entry ], [ %.pre, %if.then ]
ret i32 %tmp1
}
; CHECK: g: # @g
; CHECK-NEXT: .cfi_startproc
; CHECK-NEXT: # %bb.0: # %entry
; CHECK-NEXT: pushq %rbp
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: .cfi_offset %rbp, -16
; CHECK-NEXT: movq %rsp, %rbp
; CHECK-NEXT: .cfi_def_cfa_register %rbp
; CHECK-NEXT: pushq %rbx
; CHECK-NEXT: pushq %rax
; CHECK-NEXT: .cfi_offset %rbx, -24
; CHECK-NEXT: data16
; CHECK-NEXT: leaq i@TLSGD(%rip), %rdi
declare void @f(...) #1
attributes #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" }
attributes #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" }
attributes #2 = { nounwind }
|