| ; Test non-default shadow mapping scale and offset. |
| ; |
| ; RUN: opt < %s -asan -asan-mapping-scale=2 -asan-mapping-offset-log=0 -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" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| ; Test that ASan tells scale and offset to runtime. |
| ; CHECK: @__asan_mapping_offset = linkonce_odr constant i64 0 |
| ; CHECK: @__asan_mapping_scale = linkonce_odr constant i64 2 |
| |
| define i32 @test_load(i32* %a) sanitize_address { |
| ; CHECK: @test_load |
| ; CHECK-NOT: load |
| ; CHECK: %[[LOAD_ADDR:[^ ]*]] = ptrtoint i32* %a to i64 |
| ; CHECK: lshr i64 %[[LOAD_ADDR]], 2 |
| |
| ; No need in shift for zero offset. |
| ; CHECK-NOT: or i64 |
| |
| ; CHECK: %[[LOAD_SHADOW_PTR:[^ ]*]] = inttoptr |
| ; CHECK: %[[LOAD_SHADOW:[^ ]*]] = load i8* %[[LOAD_SHADOW_PTR]] |
| ; CHECK: icmp ne i8 |
| ; CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{.*}} |
| |
| ; No need in slow path for i32 and mapping scale equal to 2. |
| ; CHECK-NOT: and i64 %[[LOAD_ADDR]] |
| ; |
| ; The crash block reports the error. |
| ; CHECK: call void @__asan_report_load4(i64 %[[LOAD_ADDR]]) |
| ; CHECK: unreachable |
| ; |
| ; The actual load. |
| ; CHECK: %tmp1 = load i32* %a |
| ; CHECK: ret i32 %tmp1 |
| |
| entry: |
| %tmp1 = load i32* %a |
| ret i32 %tmp1 |
| } |
| |
