1; RUN: opt < %s -passes=dfsan -dfsan-track-origins=2 -S | FileCheck %s 2target 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" 3target triple = "x86_64-unknown-linux-gnu" 4 5define i64 @load64(ptr %p) { 6 ; CHECK-LABEL: @load64.dfsan 7 8 ; CHECK-NEXT: %[[#PO:]] = load i32, ptr @__dfsan_arg_origin_tls, align 4 9 ; CHECK-NEXT: %[[#PS:]] = load i8, ptr @__dfsan_arg_tls, align [[ALIGN:2]] 10 11 ; CHECK-NEXT: %[[#LABEL_ORIGIN:]] = call zeroext i64 @__dfsan_load_label_and_origin(ptr %p, i64 8) 12 ; CHECK-NEXT: %[[#LABEL_ORIGIN_H32:]] = lshr i64 %[[#LABEL_ORIGIN]], 32 13 ; CHECK-NEXT: %[[#LABEL:]] = trunc i64 %[[#LABEL_ORIGIN_H32]] to i8 14 ; CHECK-NEXT: %[[#ORIGIN:]] = trunc i64 %[[#LABEL_ORIGIN]] to i32 15 ; CHECK-NEXT: %[[#ORIGIN_CHAINED:]] = call i32 @__dfsan_chain_origin_if_tainted(i8 %[[#LABEL]], i32 %[[#ORIGIN]]) 16 17 ; CHECK-NEXT: %[[#LABEL:]] = or i8 %[[#LABEL]], %[[#PS]] 18 ; CHECK-NEXT: %[[#NZ:]] = icmp ne i8 %[[#PS]], 0 19 ; CHECK-NEXT: %[[#ORIGIN_SEL:]] = select i1 %[[#NZ]], i32 %[[#PO]], i32 %[[#ORIGIN_CHAINED]] 20 21 ; CHECK-NEXT: %a = load i64, ptr %p 22 ; CHECK-NEXT: store i8 %[[#LABEL]], ptr @__dfsan_retval_tls, align [[ALIGN]] 23 ; CHECK-NEXT: store i32 %[[#ORIGIN_SEL]], ptr @__dfsan_retval_origin_tls, align 4 24 25 %a = load i64, ptr %p 26 ret i64 %a 27} 28