1 ; Test non-default shadow mapping scale and offset. 2 ; 3 ; RUN: opt < %s -asan -asan-mapping-scale=2 -asan-mapping-offset-log=0 -S | FileCheck %s 4 5 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" 6 target triple = "x86_64-unknown-linux-gnu" 7 8 ; Test that ASan tells scale and offset to runtime. 9 ; CHECK: @__asan_mapping_offset = linkonce_odr constant i64 0 10 ; CHECK: @__asan_mapping_scale = linkonce_odr constant i64 2 11 12 define i32 @test_load(i32* %a) sanitize_address { 13 ; CHECK: @test_load 14 ; CHECK-NOT: load 15 ; CHECK: %[[LOAD_ADDR:[^ ]*]] = ptrtoint i32* %a to i64 16 ; CHECK: lshr i64 %[[LOAD_ADDR]], 2 17 18 ; No need in shift for zero offset. 19 ; CHECK-NOT: or i64 20 21 ; CHECK: %[[LOAD_SHADOW_PTR:[^ ]*]] = inttoptr 22 ; CHECK: %[[LOAD_SHADOW:[^ ]*]] = load i8* %[[LOAD_SHADOW_PTR]] 23 ; CHECK: icmp ne i8 24 ; CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{.*}} 25 26 ; No need in slow path for i32 and mapping scale equal to 2. 27 ; CHECK-NOT: and i64 %[[LOAD_ADDR]] 28 ; 29 ; The crash block reports the error. 30 ; CHECK: call void @__asan_report_load4(i64 %[[LOAD_ADDR]]) 31 ; CHECK: unreachable 32 ; 33 ; The actual load. 34 ; CHECK: %tmp1 = load i32* %a 35 ; CHECK: ret i32 %tmp1 36 37 entry: 38 %tmp1 = load i32* %a 39 ret i32 %tmp1 40 } 41 42
