aboutsummaryrefslogtreecommitdiff
path: root/test/CodeGen/X86/2012-01-16-mfence-nosse-flags.ll
blob: a883d7938b55cd73a2cfd3094837c987da4f2db7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
; RUN: llc < %s -mtriple=i686-linux -mattr=-sse | FileCheck %s
; PR11768

@ptr = external global i8*

define void @baz() nounwind ssp {
entry:
  %0 = load i8** @ptr, align 4
  %cmp = icmp eq i8* %0, null
  fence seq_cst
  br i1 %cmp, label %if.then, label %if.else

; Make sure the fence comes before the comparison, since it
; clobbers EFLAGS.

; CHECK: lock
; CHECK-NEXT: orl {{.*}}, (%esp)
; CHECK-NEXT: cmpl $0

if.then:                                          ; preds = %entry
  tail call void bitcast (void (...)* @foo to void ()*)() nounwind
  br label %if.end

if.else:                                          ; preds = %entry
  tail call void bitcast (void (...)* @bar to void ()*)() nounwind
  br label %if.end

if.end:                                           ; preds = %if.else, %if.then
  ret void
}

declare void @foo(...)

declare void @bar(...)