derek.holloway
7502bf64a4
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34 lines
1.6 KiB
LLVM
34 lines
1.6 KiB
LLVM
; RUN: opt < %s -msan-check-access-address=0 -S 2>&1 -passes=msan | FileCheck %s
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; Test that MSan doesn't generate code overflowing __msan_va_arg_tls when too many arguments are
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; passed to a variadic function.
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define dso_local i64 @many_args() {
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entry:
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%ret = call i64 (i64, ...) @sum(i64 120,
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i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
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i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
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i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
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i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
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i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
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i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
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i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
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i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
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i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
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i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
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i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
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i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,
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i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1
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)
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ret i64 %ret
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}
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; If the size of __msan_va_arg_tls changes the second argument of `getelementptr` must also be changed.
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; CHECK-LABEL: @many_args
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; CHECK: getelementptr (i8, ptr @__msan_va_arg_tls, i64 792)
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; CHECK-NOT: getelementptr (i8, ptr @__msan_va_arg_tls, i64 800)
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declare i64 @sum(i64 %n, ...)
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