1 ; RUN: opt -instsimplify < %s -S | FileCheck %s 2 3 ; CHECK: define i1 @test 4 define 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 13 define 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 } 22
