diff --git a/llvm/include/llvm/IR/Intrinsics.td b/llvm/include/llvm/IR/Intrinsics.td --- a/llvm/include/llvm/IR/Intrinsics.td +++ b/llvm/include/llvm/IR/Intrinsics.td @@ -1570,10 +1570,10 @@ def int_hwasan_check_memaccess : Intrinsic<[], [llvm_ptr_ty, llvm_ptr_ty, llvm_i32_ty], - [IntrInaccessibleMemOnly, ImmArg>]>; + [ImmArg>]>; def int_hwasan_check_memaccess_shortgranules : Intrinsic<[], [llvm_ptr_ty, llvm_ptr_ty, llvm_i32_ty], - [IntrInaccessibleMemOnly, ImmArg>]>; + [ImmArg>]>; // Xray intrinsics //===----------------------------------------------------------------------===// diff --git a/llvm/test/Instrumentation/HWAddressSanitizer/memaccess-clobber.ll b/llvm/test/Instrumentation/HWAddressSanitizer/memaccess-clobber.ll new file mode 100644 --- /dev/null +++ b/llvm/test/Instrumentation/HWAddressSanitizer/memaccess-clobber.ll @@ -0,0 +1,20 @@ +; Make sure memaccess checks preceed the following reads. +; +; RUN: opt < %s -S -enable-new-pm=0 -hwasan -basic-aa -memdep -print-memdeps -analyze -mtriple aarch64-linux-android30 | FileCheck %s + +target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128" +target triple = "aarch64--linux-android10000" + +declare void @use32(i32*) + +define i32 @test_alloca() sanitize_hwaddress { +entry: + %x = alloca i32, align 4 + call void @use32(i32* nonnull %x) + ; CHECK: Clobber from: call void @llvm.hwasan.check.memaccess.shortgranule + ; CHECK-NEXT: load i32, i32* %x.hwasan, align 4 + %y = load i32, i32* %x + ; CHECK: Clobber from: %y = load i32, i32* %x.hwasan, align 4 + ; CHECK-NEXT: call void @llvm.memset.p0i8.i64(i8* align 1 {{.*}}, i8 0, i64 1, i1 false) + ret i32 %y +}