61 lines
2.3 KiB
LLVM
61 lines
2.3 KiB
LLVM
; Testcase generated from the following code:
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; extern __thread int i;
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; void f();
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; int g(void) {
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; if (i) {
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; i = 0;
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; f();
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; }
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; return i;
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; }
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; We want to make sure that TLS variables are not accessed before
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; the stack frame is set up.
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; RUN: llc < %s -relocation-model=pic | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-freebsd11.0"
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@i = external thread_local global i32, align 4
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define i32 @g() #0 {
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entry:
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%tmp = load i32, i32* @i, align 4
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%tobool = icmp eq i32 %tmp, 0
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br i1 %tobool, label %if.end, label %if.then
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if.then: ; preds = %entry
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store i32 0, i32* @i, align 4
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tail call void (...) @f() #2
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%.pre = load i32, i32* @i, align 4
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br label %if.end
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if.end: ; preds = %if.then, %entry
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%tmp1 = phi i32 [ 0, %entry ], [ %.pre, %if.then ]
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ret i32 %tmp1
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}
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; CHECK: g: # @g
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; CHECK-NEXT: .cfi_startproc
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; CHECK-NEXT: # BB#0: # %entry
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; CHECK-NEXT: pushq %rbp
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; CHECK-NEXT: .Ltmp0:
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; CHECK-NEXT: .cfi_def_cfa_offset 16
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; CHECK-NEXT: .Ltmp1:
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; CHECK-NEXT: .cfi_offset %rbp, -16
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; CHECK-NEXT: movq %rsp, %rbp
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; CHECK-NEXT: .Ltmp2:
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; CHECK-NEXT: .cfi_def_cfa_register %rbp
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; CHECK-NEXT: pushq %rbx
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; CHECK-NEXT: pushq %rax
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; CHECK-NEXT: .Ltmp3:
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; CHECK-NEXT: .cfi_offset %rbx, -24
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; CHECK-NEXT: data16
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; CHECK-NEXT: leaq i@TLSGD(%rip), %rdi
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declare void @f(...) #1
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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" }
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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" }
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attributes #2 = { nounwind }
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