forked from OSchip/llvm-project
32 lines
1.8 KiB
LLVM
32 lines
1.8 KiB
LLVM
; RUN: opt < %s -dfsan -dfsan-track-origins=2 -S | FileCheck %s
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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-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; CHECK: @__dfsan_shadow_width_bits = weak_odr constant i32 [[#SBITS:]]
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; CHECK: @__dfsan_shadow_width_bytes = weak_odr constant i32 [[#SBYTES:]]
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define i64 @load64(i64* %p) {
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; CHECK-LABEL: @load64.dfsan
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; CHECK-NEXT: %[[#PO:]] = load i32, i32* getelementptr inbounds ([200 x i32], [200 x i32]* @__dfsan_arg_origin_tls, i64 0, i64 0), align 4
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; CHECK-NEXT: %[[#PS:]] = load i[[#SBITS]], i[[#SBITS]]* bitcast ([100 x i64]* @__dfsan_arg_tls to i[[#SBITS]]*), align [[ALIGN:2]]
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; CHECK-NEXT: %[[#INTP:]] = bitcast i64* %p to i8*
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; CHECK-NEXT: %[[#LABEL_ORIGIN:]] = call zeroext i64 @__dfsan_load_label_and_origin(i8* %[[#INTP]], i64 8)
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; CHECK-NEXT: %[[#LABEL_ORIGIN_H32:]] = lshr i64 %[[#LABEL_ORIGIN]], 32
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; CHECK-NEXT: %[[#LABEL:]] = trunc i64 %[[#LABEL_ORIGIN_H32]] to i[[#SBITS]]
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; CHECK-NEXT: %[[#ORIGIN:]] = trunc i64 %[[#LABEL_ORIGIN]] to i32
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; CHECK-NEXT: %[[#ORIGIN_CHAINED:]] = call i32 @__dfsan_chain_origin_if_tainted(i[[#SBITS]] %[[#LABEL]], i32 %[[#ORIGIN]])
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; CHECK-NEXT: %[[#LABEL:]] = or i[[#SBITS]] %[[#LABEL]], %[[#PS]]
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; CHECK-NEXT: %[[#NZ:]] = icmp ne i[[#SBITS]] %[[#PS]], 0
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; CHECK-NEXT: %[[#ORIGIN_SEL:]] = select i1 %[[#NZ]], i32 %[[#PO]], i32 %[[#ORIGIN_CHAINED]]
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; CHECK-NEXT: %a = load i64, i64* %p
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; CHECK-NEXT: store i[[#SBITS]] %[[#LABEL]], i[[#SBITS]]* bitcast ([100 x i64]* @__dfsan_retval_tls to i[[#SBITS]]*), align [[ALIGN]]
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; CHECK-NEXT: store i32 %[[#ORIGIN_SEL]], i32* @__dfsan_retval_origin_tls, align 4
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%a = load i64, i64* %p
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ret i64 %a
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}
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