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llvm-project/llvm/test/Instrumentation/MemorySanitizer/msan_llvm_is_constant.ll

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[MSan] Handle llvm.is.constant intrinsic MSan used to report false positives in the case the argument of llvm.is.constant intrinsic was uninitialized. In fact checking this argument is unnecessary, as the intrinsic is only used at compile time, and its value doesn't depend on the value of the argument. llvm-svn: 350173
2018-12-31 17:42:23 +08:00
; Make sure MSan doesn't insert shadow checks for @llvm.is.constant.* arguments.
[MSan] Apply the ctor creation scheme of TSan Summary: To avoid adding an extern function to the global ctors list, apply the changes of D56538 also to MSan. Reviewers: chandlerc, vitalybuka, fedor.sergeev, leonardchan Subscribers: hiraditya, bollu, llvm-commits Differential Revision: https://reviews.llvm.org/D56734 llvm-svn: 351322
2019-01-16 19:14:07 +08:00
; RUN: opt < %s -msan-kernel=1 -S -passes=msan 2>&1 | FileCheck \
; RUN: -check-prefixes=CHECK %s
[MSan] Handle llvm.is.constant intrinsic MSan used to report false positives in the case the argument of llvm.is.constant intrinsic was uninitialized. In fact checking this argument is unnecessary, as the intrinsic is only used at compile time, and its value doesn't depend on the value of the argument. llvm-svn: 350173
2018-12-31 17:42:23 +08:00
; RUN: opt < %s -msan -msan-kernel=1 -S | FileCheck -check-prefixes=CHECK %s
[MSan] Apply the ctor creation scheme of TSan Summary: To avoid adding an extern function to the global ctors list, apply the changes of D56538 also to MSan. Reviewers: chandlerc, vitalybuka, fedor.sergeev, leonardchan Subscribers: hiraditya, bollu, llvm-commits Differential Revision: https://reviews.llvm.org/D56734 llvm-svn: 351322
2019-01-16 19:14:07 +08:00
; RUN: opt < %s -S -passes=msan 2>&1 | FileCheck -check-prefixes=CHECK %s
[MSan] Handle llvm.is.constant intrinsic MSan used to report false positives in the case the argument of llvm.is.constant intrinsic was uninitialized. In fact checking this argument is unnecessary, as the intrinsic is only used at compile time, and its value doesn't depend on the value of the argument. llvm-svn: 350173
2018-12-31 17:42:23 +08:00
; RUN: opt < %s -msan -S | FileCheck -check-prefixes=CHECK %s
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
; Function Attrs: nounwind readnone uwtable
define dso_local i32 @bar(i32 %v) local_unnamed_addr sanitize_memory {
entry:
%0 = tail call i1 @llvm.is.constant.i32(i32 %v)
%1 = zext i1 %0 to i32
ret i32 %1
}
; CHECK-LABEL: bar
[MSAN] Pass Origin by parameter to __msan_warning functions Summary: Normally, the Origin is passed over TLS, which seems like it introduces unnecessary overhead. It's in the (extremely) cold path though, so the only overhead is in code size. But with eager-checks, calls to __msan_warning functions are extremely common, so this becomes a useful optimization. This can save ~5% code size. Reviewers: eugenis, vitalybuka Reviewed By: eugenis, vitalybuka Subscribers: hiraditya, #sanitizers, llvm-commits Tags: #sanitizers, #llvm Differential Revision: https://reviews.llvm.org/D81700
2020-06-16 06:17:00 +08:00
; CHECK-NOT: call void @__msan_warning_with_origin
[MSan] Handle llvm.is.constant intrinsic MSan used to report false positives in the case the argument of llvm.is.constant intrinsic was uninitialized. In fact checking this argument is unnecessary, as the intrinsic is only used at compile time, and its value doesn't depend on the value of the argument. llvm-svn: 350173
2018-12-31 17:42:23 +08:00
; Function Attrs: nounwind readnone
declare i1 @llvm.is.constant.i32(i32)