File: NoundefAttrs.ll

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llvm-toolchain-13 1%3A13.0.1-6~deb11u1
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; RUN: opt -deadargelim -S < %s | FileCheck %s

; If caller is changed to pass in undef, noundef, dereferenceable and other
; attributes that imply immediate undefined behavior should be delete.
; Other attributes like nonnull, which only imply poison, can be safely kept.

; CHECK:   define i64 @bar(i64* nonnull %0, i64 %1)
define i64 @bar(i64* nonnull dereferenceable(8) %0, i64 %1) {
entry:
  %2 = add i64 %1, 8
  ret i64 %2
}

define i64 @foo(i64* %p, i64 %v) {
; CHECK:   %retval = call i64 @bar(i64* nonnull undef, i64 %v)
  %retval = call i64 @bar(i64* nonnull dereferenceable(8) %p, i64 %v)
  ret i64 %retval
}