llvm-project/llvm/test/Transforms/ConstProp/2002-05-03-NotOperator.ll

20 lines
523 B
LLVM

; This bug has to do with the fact that constant propogation was implemented in
; terms of _logical_ not (! in C) instead of _bitwise_ not (~ in C). This was
; due to a spec change.
; Fix #2: The unary not instruction now no longer exists. Change to xor.
; RUN: opt < %s -constprop -S | \
; RUN: not grep {i32 0}
define i32 @test1() {
%R = xor i32 123, -1 ; <i32> [#uses=1]
ret i32 %R
}
define i32 @test2() {
%R = xor i32 -123, -1 ; <i32> [#uses=1]
ret i32 %R
}