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90844c4778
After the -asan pass had been split into -asan (function-level) and -asan-module (module-level) some of the tests have silently stopped working, because they didn't instrument the globals anymore. We've decided to have every test using both passes, irrespective of the presence of globals in it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204335 91177308-0d34-0410-b5e6-96231b3b80d8
57 lines
1.9 KiB
LLVM
57 lines
1.9 KiB
LLVM
; RUN: opt < %s -basicaa -gvn -asan -asan-module -S | FileCheck %s
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; ASAN conflicts with load widening iff the widened load accesses data out of bounds
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; (while the original unwidened loads do not).
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; http://code.google.com/p/address-sanitizer/issues/detail?id=20#c1
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; 32-bit little endian target.
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32"
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%struct_of_7_bytes_4_aligned = type { i32, i8, i8, i8}
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@f = external global %struct_of_7_bytes_4_aligned , align 4
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; Accessing bytes 4 and 6, not ok to widen to i32 if sanitize_address is set.
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define i32 @test_widening_bad(i8* %P) nounwind ssp noredzone sanitize_address {
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entry:
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%tmp = load i8* getelementptr inbounds (%struct_of_7_bytes_4_aligned* @f, i64 0, i32 1), align 4
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%conv = zext i8 %tmp to i32
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%tmp1 = load i8* getelementptr inbounds (%struct_of_7_bytes_4_aligned* @f, i64 0, i32 3), align 1
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%conv2 = zext i8 %tmp1 to i32
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%add = add nsw i32 %conv, %conv2
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ret i32 %add
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; CHECK: @test_widening_bad
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; CHECK: __asan_report_load1
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; CHECK: __asan_report_load1
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; CHECK-NOT: __asan_report
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; We can not use check for "ret" here because __asan_report_load1 calls live after ret.
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; CHECK: end_test_widening_bad
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}
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define void @end_test_widening_bad() {
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entry:
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ret void
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}
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;; Accessing bytes 4 and 5. Ok to widen to i16.
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define i32 @test_widening_ok(i8* %P) nounwind ssp noredzone sanitize_address {
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entry:
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%tmp = load i8* getelementptr inbounds (%struct_of_7_bytes_4_aligned* @f, i64 0, i32 1), align 4
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%conv = zext i8 %tmp to i32
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%tmp1 = load i8* getelementptr inbounds (%struct_of_7_bytes_4_aligned* @f, i64 0, i32 2), align 1
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%conv2 = zext i8 %tmp1 to i32
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%add = add nsw i32 %conv, %conv2
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ret i32 %add
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; CHECK: @test_widening_ok
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; CHECK: __asan_report_load2
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; CHECK-NOT: __asan_report
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; CHECK: end_test_widening_ok
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}
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define void @end_test_widening_ok() {
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entry:
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ret void
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}
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