blob: 33a4d6b02d638f1f0cfbb12626bd9fe6bc462c03 [file] [log] [blame]
Duncan Sandsba286d72011-10-26 20:55:21 +00001; RUN: opt < %s -instsimplify -S | FileCheck %s
2
3define i64 @pow2(i32 %x) {
4; CHECK: @pow2
5 %negx = sub i32 0, %x
6 %x2 = and i32 %x, %negx
7 %e = zext i32 %x2 to i64
8 %nege = sub i64 0, %e
9 %e2 = and i64 %e, %nege
10 ret i64 %e2
11; CHECK: ret i64 %e
12}
Duncan Sands985ba632011-10-28 18:30:05 +000013
14define i64 @pow2b(i32 %x) {
15; CHECK: @pow2b
16 %sh = shl i32 2, %x
17 %e = zext i32 %sh to i64
18 %nege = sub i64 0, %e
19 %e2 = and i64 %e, %nege
20 ret i64 %e2
21; CHECK: ret i64 %e
22}