llvm/test/Instrumentation/ThreadSanitizer/volatile.ll

; RUN: opt < %s -passes=tsan -tsan-distinguish-volatile -S | FileCheck %s

target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"

define i16 @test_volatile_read2(ptr %a) sanitize_thread {
entry:
  %tmp1 = load volatile i16, ptr %a, align 2
  ret i16 %tmp1
}

; CHECK-LABEL: define i16 @test_volatile_read2(ptr %a)
; CHECK:        call void @__tsan_func_entry(ptr %0)
; CHECK-NEXT:   call void @__tsan_volatile_read2(ptr %a)
; CHECK-NEXT:   %tmp1 = load volatile i16, ptr %a, align 2
; CHECK-NEXT:   call void @__tsan_func_exit()
; CHECK: ret i16

define i32 @test_volatile_read4(ptr %a) sanitize_thread {
entry:
  %tmp1 = load volatile i32, ptr %a, align 4
  ret i32 %tmp1
}

; CHECK-LABEL: define i32 @test_volatile_read4(ptr %a)
; CHECK:        call void @__tsan_func_entry(ptr %0)
; CHECK-NEXT:   call void @__tsan_volatile_read4(ptr %a)
; CHECK-NEXT:   %tmp1 = load volatile i32, ptr %a, align 4
; CHECK-NEXT:   call void @__tsan_func_exit()
; CHECK: ret i32

define i64 @test_volatile_read8(ptr %a) sanitize_thread {
entry:
  %tmp1 = load volatile i64, ptr %a, align 8
  ret i64 %tmp1
}

; CHECK-LABEL: define i64 @test_volatile_read8(ptr %a)
; CHECK:        call void @__tsan_func_entry(ptr %0)
; CHECK-NEXT:   call void @__tsan_volatile_read8(ptr %a)
; CHECK-NEXT:   %tmp1 = load volatile i64, ptr %a, align 8
; CHECK-NEXT:   call void @__tsan_func_exit()
; CHECK: ret i64

define i128 @test_volatile_read16(ptr %a) sanitize_thread {
entry:
  %tmp1 = load volatile i128, ptr %a, align 16
  ret i128 %tmp1
}

; CHECK-LABEL: define i128 @test_volatile_read16(ptr %a)
; CHECK:        call void @__tsan_func_entry(ptr %0)
; CHECK-NEXT:   call void @__tsan_volatile_read16(ptr %a)
; CHECK-NEXT:   %tmp1 = load volatile i128, ptr %a, align 16
; CHECK-NEXT:   call void @__tsan_func_exit()
; CHECK: ret i128

define void @test_volatile_write2(ptr %a) sanitize_thread {
entry:
  store volatile i16 1, ptr %a, align 2
  ret void
}

; CHECK-LABEL: define void @test_volatile_write2(ptr %a)
; CHECK:        call void @__tsan_func_entry(ptr %0)
; CHECK-NEXT:   call void @__tsan_volatile_write2(ptr %a)
; CHECK-NEXT:   store volatile i16 1, ptr %a, align 2
; CHECK-NEXT:   call void @__tsan_func_exit()
; CHECK: ret void

define void @test_volatile_write4(ptr %a) sanitize_thread {
entry:
  store volatile i32 1, ptr %a, align 4
  ret void
}

; CHECK-LABEL: define void @test_volatile_write4(ptr %a)
; CHECK:        call void @__tsan_func_entry(ptr %0)
; CHECK-NEXT:   call void @__tsan_volatile_write4(ptr %a)
; CHECK-NEXT:   store volatile i32 1, ptr %a, align 4
; CHECK-NEXT:   call void @__tsan_func_exit()
; CHECK: ret void

define void @test_volatile_write8(ptr %a) sanitize_thread {
entry:
  store volatile i64 1, ptr %a, align 8
  ret void
}

; CHECK-LABEL: define void @test_volatile_write8(ptr %a)
; CHECK:        call void @__tsan_func_entry(ptr %0)
; CHECK-NEXT:   call void @__tsan_volatile_write8(ptr %a)
; CHECK-NEXT:   store volatile i64 1, ptr %a, align 8
; CHECK-NEXT:   call void @__tsan_func_exit()
; CHECK: ret void

define void @test_volatile_write16(ptr %a) sanitize_thread {
entry:
  store volatile i128 1, ptr %a, align 16
  ret void
}

; CHECK-LABEL: define void @test_volatile_write16(ptr %a)
; CHECK:        call void @__tsan_func_entry(ptr %0)
; CHECK-NEXT:   call void @__tsan_volatile_write16(ptr %a)
; CHECK-NEXT:   store volatile i128 1, ptr %a, align 16
; CHECK-NEXT:   call void @__tsan_func_exit()
; CHECK: ret void

; Check unaligned volatile accesses

define i32 @test_unaligned_read4(ptr %a) sanitize_thread {
entry:
  %tmp1 = load volatile i32, ptr %a, align 2
  ret i32 %tmp1
}

; CHECK-LABEL: define i32 @test_unaligned_read4(ptr %a)
; CHECK:        call void @__tsan_func_entry(ptr %0)
; CHECK-NEXT:   call void @__tsan_unaligned_volatile_read4(ptr %a)
; CHECK-NEXT:   %tmp1 = load volatile i32, ptr %a, align 2
; CHECK-NEXT:   call void @__tsan_func_exit()
; CHECK: ret i32

define void @test_unaligned_write4(ptr %a) sanitize_thread {
entry:
  store volatile i32 1, ptr %a, align 1
  ret void
}

; CHECK-LABEL: define void @test_unaligned_write4(ptr %a)
; CHECK:        call void @__tsan_func_entry(ptr %0)
; CHECK-NEXT:   call void @__tsan_unaligned_volatile_write4(ptr %a)
; CHECK-NEXT:   store volatile i32 1, ptr %a, align 1
; CHECK-NEXT:   call void @__tsan_func_exit()
; CHECK: ret void

; Check that regular aligned accesses are unaffected

define i32 @test_read4(ptr %a) sanitize_thread {
entry:
  %tmp1 = load i32, ptr %a, align 4
  ret i32 %tmp1
}

; CHECK-LABEL: define i32 @test_read4(ptr %a)
; CHECK:        call void @__tsan_func_entry(ptr %0)
; CHECK-NEXT:   call void @__tsan_read4(ptr %a)
; CHECK-NEXT:   %tmp1 = load i32, ptr %a, align 4
; CHECK-NEXT:   call void @__tsan_func_exit()
; CHECK: ret i32

define void @test_write4(ptr %a) sanitize_thread {
entry:
  store i32 1, ptr %a, align 4
  ret void
}

; CHECK-LABEL: define void @test_write4(ptr %a)
; CHECK:        call void @__tsan_func_entry(ptr %0)
; CHECK-NEXT:   call void @__tsan_write4(ptr %a)
; CHECK-NEXT:   store i32 1, ptr %a, align 4
; CHECK-NEXT:   call void @__tsan_func_exit()
; CHECK: ret void