File: 2002-05-03-NotOperator.ll

package info (click to toggle)
llvm-toolchain-14 1%3A14.0.6-12
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,496,180 kB
  • sloc: cpp: 5,593,972; ansic: 986,872; asm: 585,869; python: 184,223; objc: 72,530; lisp: 31,119; f90: 27,793; javascript: 9,780; pascal: 9,762; sh: 9,482; perl: 7,468; ml: 5,432; awk: 3,523; makefile: 2,538; xml: 953; cs: 573; fortran: 567
file content (19 lines) | stat: -rw-r--r-- 526 bytes parent folder | download | duplicates (6)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
; This bug has to do with the fact that constant propagation 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 -instsimplify -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
}