reference, declaration → definition
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
   41
   42
   43
   44
   45
   46
   47
   48
   49
   50
   51
   52
   53
   54
   55
   56
   57
   58
   59
   60
   61
   62
   63
   64
   65
   66
   67
   68
   69
   70
   71
   72
   73
   74
   75
   76
   77
   78
   79
   80
   81
   82
   83
   84
   85
   86
   87
   88
   89
   90
   91
   92
   93

; RUN: opt -basicaa -print-memoryssa -verify-memoryssa -analyze < %s 2>&1 | FileCheck %s
; RUN: opt -aa-pipeline=basic-aa -passes='print<memoryssa>,verify<memoryssa>' -disable-output < %s 2>&1 | FileCheck %s
;
; Ensures that volatile stores/loads count as MemoryDefs

; CHECK-LABEL: define i32 @foo
define i32 @foo() {
  %1 = alloca i32, align 4
; CHECK: 1 = MemoryDef(liveOnEntry)
; CHECK-NEXT: store volatile i32 4
  store volatile i32 4, i32* %1, align 4
; CHECK: 2 = MemoryDef(1)
; CHECK-NEXT: store volatile i32 8
  store volatile i32 8, i32* %1, align 4
; CHECK: 3 = MemoryDef(2)
; CHECK-NEXT: %2 = load volatile i32
  %2 = load volatile i32, i32* %1, align 4
; CHECK: 4 = MemoryDef(3)
; CHECK-NEXT: %3 = load volatile i32
  %3 = load volatile i32, i32* %1, align 4
  %4 = add i32 %3, %2
  ret i32 %4
}

; Ensuring we allow hoisting nonvolatile loads around volatile loads.
; CHECK-LABEL define void @volatile_only
define void @volatile_only(i32* %arg1, i32* %arg2) {
  ; Trivially NoAlias/MustAlias
  %a = alloca i32
  %b = alloca i32

; CHECK: 1 = MemoryDef(liveOnEntry)
; CHECK-NEXT: load volatile i32, i32* %a
  load volatile i32, i32* %a
; CHECK: MemoryUse(liveOnEntry)
; CHECK-NEXT: load i32, i32* %b
  load i32, i32* %b
; CHECK: MemoryUse(liveOnEntry)
; CHECK-NEXT: load i32, i32* %a
  load i32, i32* %a

  ; MayAlias
; CHECK: 2 = MemoryDef(1)
; CHECK-NEXT: load volatile i32, i32* %arg1
  load volatile i32, i32* %arg1
; CHECK: MemoryUse(liveOnEntry)
; CHECK-NEXT: load i32, i32* %arg2
  load i32, i32* %arg2

  ret void
}

; Ensuring that volatile atomic operations work properly.
; CHECK-LABEL define void @volatile_atomics
define void @volatile_atomics(i32* %arg1, i32* %arg2) {
  %a = alloca i32
  %b = alloca i32

 ; Trivially NoAlias/MustAlias

; CHECK: 1 = MemoryDef(liveOnEntry)
; CHECK-NEXT: load atomic volatile i32, i32* %a acquire, align 4
  load atomic volatile i32, i32* %a acquire, align 4
; CHECK: MemoryUse(1)
; CHECK-NEXT: load i32, i32* %b
  load i32, i32* %b

; CHECK: 2 = MemoryDef(1)
; CHECK-NEXT: load atomic volatile i32, i32* %a monotonic, align 4
  load atomic volatile i32, i32* %a monotonic, align 4
; CHECK: MemoryUse(1)
; CHECK-NEXT: load i32, i32* %b
  load i32, i32* %b
; CHECK: MemoryUse(1)
; CHECK-NEXT: load atomic i32, i32* %b unordered, align 4
  load atomic i32, i32* %b unordered, align 4
; CHECK: MemoryUse(1)
; CHECK-NEXT: load atomic i32, i32* %a unordered, align 4
  load atomic i32, i32* %a unordered, align 4
; CHECK: MemoryUse(1)
; CHECK-NEXT: load i32, i32* %a
  load i32, i32* %a

  ; MayAlias
; CHECK: 3 = MemoryDef(2)
; CHECK-NEXT: load atomic volatile i32, i32* %arg1 monotonic, align 4
  load atomic volatile i32, i32* %arg1 monotonic, align 4
; CHECK: MemoryUse(1)
; CHECK-NEXT: load i32, i32* %arg2
  load i32, i32* %arg2

  ret void
}