1; RUN: opt < %s -msan-check-access-address=0 -S -passes=msan 2>&1 | FileCheck %s 2; RUN: opt < %s -msan-check-access-address=0 -msan-track-origins=2 -S -passes=msan 2>&1 | FileCheck %s -check-prefixes=CHECK,CHECK-ORIGIN 3target 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" 4target triple = "x86_64-unknown-linux-gnu" 5 6declare void @__atomic_load(i64, ptr, ptr, i32) 7declare void @__atomic_store(i64, ptr, ptr, i32) 8 9define i24 @odd_sized_load(ptr %ptr) sanitize_memory { 10; CHECK: @odd_sized_load(ptr {{.*}}[[PTR:%.+]]) 11; CHECK: [[VAL_PTR:%.*]] = alloca i24, align 1 12; CHECK-ORIGIN: @__msan_set_alloca_origin 13; CHECK: call void @__atomic_load(i64 3, ptr [[PTR]], ptr [[VAL_PTR]], i32 2) 14 15; CHECK: ptrtoint ptr [[PTR]] 16; CHECK: xor 17; CHECK: [[SPTR_I8:%.*]] = inttoptr 18; CHECK-ORIGIN: add 19; CHECK-ORIGIN: and 20; CHECK-ORIGIN: [[OPTR:%.*]] = inttoptr 21 22; CHECK: ptrtoint ptr [[VAL_PTR]] 23; CHECK: xor 24; CHECK: [[VAL_SPTR_I8:%.*]] = inttoptr 25; CHECK-ORIGIN: add 26; CHECK-ORIGIN: and 27; CHECK-ORIGIN: [[VAL_OPTR:%.*]] = inttoptr 28 29; CHECK: call void @llvm.memcpy{{.*}}(ptr align 1 [[VAL_SPTR_I8]], ptr align 1 [[SPTR_I8]], i64 3 30 31; CHECK-ORIGIN: [[ARG_ORIGIN:%.*]] = load i32, ptr [[OPTR]] 32; CHECK-ORIGIN: [[VAL_ORIGIN:%.*]] = call i32 @__msan_chain_origin(i32 [[ARG_ORIGIN]]) 33; CHECK-ORIGIN: call void @__msan_set_origin(ptr [[VAL_PTR]], i64 3, i32 [[VAL_ORIGIN]]) 34 35; CHECK: [[VAL:%.*]] = load i24, ptr [[VAL_PTR]] 36; CHECK: ret i24 [[VAL]] 37 %val_ptr = alloca i24, align 1 38 call void @__atomic_load(i64 3, ptr %ptr, ptr %val_ptr, i32 0) 39 %val = load i24, ptr %val_ptr 40 ret i24 %val 41} 42 43define void @odd_sized_store(ptr %ptr, i24 %val) sanitize_memory { 44; CHECK: @odd_sized_store(ptr {{.*}}[[PTR:%.+]], i24 {{.*}}[[VAL:%.+]]) 45; CHECK: [[VAL_PTR:%.*]] = alloca i24, align 1 46; CHECK: store i24 [[VAL]], ptr [[VAL_PTR]] 47 48; CHECK: ptrtoint ptr [[PTR]] 49; CHECK: xor 50; CHECK: [[SPTR_I8:%.*]] = inttoptr 51; CHECK: call void @llvm.memset{{.*}}(ptr align 1 [[SPTR_I8]], i8 0, i64 3 52 53; CHECK: call void @__atomic_store(i64 3, ptr [[VAL_PTR]], ptr [[PTR]], i32 3) 54; CHECK: ret void 55 %val_ptr = alloca i24, align 1 56 store i24 %val, ptr %val_ptr 57 call void @__atomic_store(i64 3, ptr %val_ptr, ptr %ptr, i32 0) 58 ret void 59} 60 61