reference, declarationdefinition
definition → references, declarations, derived classes, virtual overrides
reference to multiple definitions → definitions
unreferenced
    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
   35
   36
   37
   38
   39
   40
; RUN: opt -simplifycfg -S %s | FileCheck %s
; Make sure we don't speculate loads under ThreadSanitizer.
@g = global i32 0, align 4

define i32 @TestNoTsan(i32 %cond) nounwind readonly uwtable {
entry:
  %tobool = icmp eq i32 %cond, 0
  br i1 %tobool, label %return, label %if.then

if.then:                                          ; preds = %entry
  %0 = load i32, i32* @g, align 4
  br label %return

return:                                           ; preds = %entry, %if.then
  %retval = phi i32 [ %0, %if.then ], [ 0, %entry ]
  ret i32 %retval
; CHECK-LABEL: @TestNoTsan
; CHECK: %[[LOAD:[^ ]*]] = load
; CHECK: select{{.*}}[[LOAD]]
; CHECK: ret i32
}

define i32 @TestTsan(i32 %cond) nounwind readonly uwtable sanitize_thread {
entry:
  %tobool = icmp eq i32 %cond, 0
  br i1 %tobool, label %return, label %if.then

if.then:                                          ; preds = %entry
  %0 = load i32, i32* @g, align 4
  br label %return

return:                                           ; preds = %entry, %if.then
  %retval = phi i32 [ %0, %if.then ], [ 0, %entry ]
  ret i32 %retval
; CHECK-LABEL: @TestTsan
; CHECK: br i1
; CHECK: load i32, i32* @g
; CHECK: br label
; CHECK: ret i32
}