test/Instrumentation/MemorySanitizer/check_access_address.ll

; RUN: opt < %s -msan-check-access-address=1 -S -passes=msan 2>&1 | FileCheck  \
; RUN: %s
; RUN: opt < %s -msan -msan-check-access-address=1 -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"
target triple = "x86_64-unknown-linux-gnu"


; Test byval argument shadow alignment

define <2 x i64> @ByValArgumentShadowLargeAlignment(<2 x i64>* byval %p) sanitize_memory {
entry:
  %x = load <2 x i64>, <2 x i64>* %p
  ret <2 x i64> %x
}

; CHECK-LABEL: @ByValArgumentShadowLargeAlignment
; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 {{.*}}, i8* align 8 {{.*}}, i64 16, i1 false)
; CHECK: ret <2 x i64>


define i16 @ByValArgumentShadowSmallAlignment(i16* byval %p) sanitize_memory {
entry:
  %x = load i16, i16* %p
  ret i16 %x
}

; CHECK-LABEL: @ByValArgumentShadowSmallAlignment
; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 2 {{.*}}, i8* align 2 {{.*}}, i64 2, i1 false)
; CHECK: ret i16


; Check instrumentation of stores. The check must precede the shadow store.

define void @Store(i32* nocapture %p, i32 %x) nounwind uwtable sanitize_memory {
entry:
  store i32 %x, i32* %p, align 4
  ret void
}

; CHECK-LABEL: @Store
; CHECK: load {{.*}} @__msan_param_tls
; Shadow calculations must happen after the check.
; CHECK-NOT: xor
; CHECK: icmp
; CHECK: br i1
; CHECK: <label>
; CHECK: call void @__msan_warning_noreturn
; CHECK: <label>
; CHECK: xor
; CHECK: store
; CHECK: store i32 %x
; CHECK: ret void