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1; RUN: opt < %s -msan-check-access-address=0 -S 2>&1 -passes=msan | FileCheck %s2 3; Test that MSan doesn't generate code overflowing __msan_va_arg_tls when too many arguments are4; passed to a variadic function.5 6target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"7target triple = "x86_64-unknown-linux-gnu"8 9define dso_local i64 @many_args() {10entry:11 %ret = call i64 (i64, ...) @sum(i64 120,12 i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,13 i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,14 i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,15 i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,16 i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,17 i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,18 i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,19 i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,20 i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,21 i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,22 i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,23 i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1,24 i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 1, i64 125 )26 ret i64 %ret27}28 29; If the size of __msan_va_arg_tls changes the second argument of `getelementptr` must also be changed.30; CHECK-LABEL: @many_args31; CHECK: getelementptr (i8, ptr @__msan_va_arg_tls, i64 792)32; CHECK-NOT: getelementptr (i8, ptr @__msan_va_arg_tls, i64 800)33declare i64 @sum(i64 %n, ...)34