1*9880d681SAndroid Build Coastguard Worker; RUN: opt < %s -instsimplify -S | FileCheck %s 2*9880d681SAndroid Build Coastguard Worker 3*9880d681SAndroid Build Coastguard Worker; PR8862 4*9880d681SAndroid Build Coastguard Worker 5*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @shift1( 6*9880d681SAndroid Build Coastguard Worker; CHECK: ret i32 %A 7*9880d681SAndroid Build Coastguard Workerdefine i32 @shift1(i32 %A, i32 %B) { 8*9880d681SAndroid Build Coastguard Worker %C = lshr exact i32 %A, %B 9*9880d681SAndroid Build Coastguard Worker %D = shl nuw i32 %C, %B 10*9880d681SAndroid Build Coastguard Worker ret i32 %D 11*9880d681SAndroid Build Coastguard Worker} 12*9880d681SAndroid Build Coastguard Worker 13*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @shift2( 14*9880d681SAndroid Build Coastguard Worker; CHECK: lshr 15*9880d681SAndroid Build Coastguard Worker; CHECK: ret i32 %D 16*9880d681SAndroid Build Coastguard Workerdefine i32 @shift2(i32 %A, i32 %B) { 17*9880d681SAndroid Build Coastguard Worker %C = lshr i32 %A, %B 18*9880d681SAndroid Build Coastguard Worker %D = shl nuw i32 %C, %B 19*9880d681SAndroid Build Coastguard Worker ret i32 %D 20*9880d681SAndroid Build Coastguard Worker} 21*9880d681SAndroid Build Coastguard Worker 22*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @shift3( 23*9880d681SAndroid Build Coastguard Worker; CHECK: ret i32 %A 24*9880d681SAndroid Build Coastguard Workerdefine i32 @shift3(i32 %A, i32 %B) { 25*9880d681SAndroid Build Coastguard Worker %C = ashr exact i32 %A, %B 26*9880d681SAndroid Build Coastguard Worker %D = shl nuw i32 %C, %B 27*9880d681SAndroid Build Coastguard Worker ret i32 %D 28*9880d681SAndroid Build Coastguard Worker} 29*9880d681SAndroid Build Coastguard Worker 30*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @shift4( 31*9880d681SAndroid Build Coastguard Worker; CHECK: ret i32 %A 32*9880d681SAndroid Build Coastguard Workerdefine i32 @shift4(i32 %A, i32 %B) { 33*9880d681SAndroid Build Coastguard Worker %C = shl nuw i32 %A, %B 34*9880d681SAndroid Build Coastguard Worker %D = lshr i32 %C, %B 35*9880d681SAndroid Build Coastguard Worker ret i32 %D 36*9880d681SAndroid Build Coastguard Worker} 37*9880d681SAndroid Build Coastguard Worker 38*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @shift5( 39*9880d681SAndroid Build Coastguard Worker; CHECK: ret i32 %A 40*9880d681SAndroid Build Coastguard Workerdefine i32 @shift5(i32 %A, i32 %B) { 41*9880d681SAndroid Build Coastguard Worker %C = shl nsw i32 %A, %B 42*9880d681SAndroid Build Coastguard Worker %D = ashr i32 %C, %B 43*9880d681SAndroid Build Coastguard Worker ret i32 %D 44*9880d681SAndroid Build Coastguard Worker} 45*9880d681SAndroid Build Coastguard Worker 46*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @div1( 47*9880d681SAndroid Build Coastguard Worker; CHECK: ret i32 0 48*9880d681SAndroid Build Coastguard Workerdefine i32 @div1(i32 %V) { 49*9880d681SAndroid Build Coastguard Worker %A = udiv i32 %V, -2147483648 50*9880d681SAndroid Build Coastguard Worker %B = udiv i32 %A, -2147483648 51*9880d681SAndroid Build Coastguard Worker ret i32 %B 52*9880d681SAndroid Build Coastguard Worker} 53*9880d681SAndroid Build Coastguard Worker 54*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @div2( 55*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: ret i32 0 56*9880d681SAndroid Build Coastguard Workerdefine i32 @div2(i32 %V) { 57*9880d681SAndroid Build Coastguard Worker %A = sdiv i32 %V, -1 58*9880d681SAndroid Build Coastguard Worker %B = sdiv i32 %A, -2147483648 59*9880d681SAndroid Build Coastguard Worker ret i32 %B 60*9880d681SAndroid Build Coastguard Worker} 61