source: icGREP/icgrep-devel/llvm-3.8.0.src/test/Analysis/ValueTracking/known-non-equal.ll @ 5027

Last change on this file since 5027 was 5027, checked in by cameron, 3 years ago

Upgrade to llvm 3.8

File size: 526 bytes
Line 
1; RUN: opt -instsimplify < %s -S | FileCheck %s
2
3; CHECK: define i1 @test
4define i1 @test(i8* %pq, i8 %B) {
5  %q = load i8, i8* %pq, !range !0 ; %q is known nonzero; no known bits
6  %A = add nsw i8 %B, %q
7  %cmp = icmp eq i8 %A, %B
8  ; CHECK: ret i1 false
9  ret i1 %cmp
10}
11
12; CHECK: define i1 @test2
13define i1 @test2(i8 %a, i8 %b) {
14  %A = or i8 %a, 2    ; %A[1] = 1
15  %B = and i8 %b, -3  ; %B[1] = 0
16  %cmp = icmp eq i8 %A, %B ; %A[1] and %B[1] are contradictory.
17  ; CHECK: ret i1 false
18  ret i1 %cmp
19}
20
21!0 = !{ i8 1, i8 5 }
Note: See TracBrowser for help on using the repository browser.