1 ; RUN: opt < %s -instsimplify -S | FileCheck %s
5 ; CHECK-LABEL: @shift1(
7 define i32 @shift1(i32 %A, i32 %B) {
8 %C = lshr exact i32 %A, %B
9 %D = shl nuw i32 %C, %B
13 ; CHECK-LABEL: @shift2(
16 define i32 @shift2(i32 %A, i32 %B) {
18 %D = shl nuw i32 %C, %B
22 ; CHECK-LABEL: @shift3(
24 define i32 @shift3(i32 %A, i32 %B) {
25 %C = ashr exact i32 %A, %B
26 %D = shl nuw i32 %C, %B
30 ; CHECK-LABEL: @shift4(
32 define i32 @shift4(i32 %A, i32 %B) {
33 %C = shl nuw i32 %A, %B
38 ; CHECK-LABEL: @shift5(
40 define i32 @shift5(i32 %A, i32 %B) {
41 %C = shl nsw i32 %A, %B
48 define i32 @div1(i32 %V) {
49 %A = udiv i32 %V, -2147483648
50 %B = udiv i32 %A, -2147483648
55 ; CHECK-NOT: ret i32 0
56 define i32 @div2(i32 %V) {
58 %B = sdiv i32 %A, -2147483648