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c909de5624
Choosing a "cfi" name makes the intend a bit clearer in an assembly dump and more importantly the assembly dumps are slightly more stable as the numbers don't move around anymore when unrelated code calls createTempSymbol() more or less often. As they are temp labels the name doesn't influence the generated object code. Differential Revision: https://reviews.llvm.org/D27244 llvm-svn: 288290
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: .Lcfi0:
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; CHECK-NEXT: .cfi_def_cfa_offset 16
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; CHECK-NEXT: .Lcfi1:
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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: .Lcfi2:
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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: .Lcfi3:
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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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