2013-01-16 13:23:28 +00:00
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; Test non-default shadow mapping scale and offset.
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;
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; RUN: opt < %s -asan -asan-mapping-scale=2 -asan-mapping-offset-log=0 -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"
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target triple = "x86_64-unknown-linux-gnu"
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; Test that ASan tells scale and offset to runtime.
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; CHECK: @__asan_mapping_offset = linkonce_odr constant i64 0
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; CHECK: @__asan_mapping_scale = linkonce_odr constant i64 2
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2013-02-26 06:58:09 +00:00
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define i32 @test_load(i32* %a) sanitize_address {
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2013-01-16 13:23:28 +00:00
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; CHECK: @test_load
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; CHECK-NOT: load
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; CHECK: %[[LOAD_ADDR:[^ ]*]] = ptrtoint i32* %a to i64
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; CHECK: lshr i64 %[[LOAD_ADDR]], 2
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; No need in shift for zero offset.
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; CHECK-NOT: or i64
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; CHECK: %[[LOAD_SHADOW_PTR:[^ ]*]] = inttoptr
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; CHECK: %[[LOAD_SHADOW:[^ ]*]] = load i8* %[[LOAD_SHADOW_PTR]]
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; CHECK: icmp ne i8
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; CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}
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; No need in slow path for i32 and mapping scale equal to 2.
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; CHECK-NOT: and i64 %[[LOAD_ADDR]]
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;
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; The crash block reports the error.
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; CHECK: call void @__asan_report_load4(i64 %[[LOAD_ADDR]])
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; CHECK: unreachable
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;
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; The actual load.
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; CHECK: %tmp1 = load i32* %a
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; CHECK: ret i32 %tmp1
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entry:
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%tmp1 = load i32* %a
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ret i32 %tmp1
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}
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