mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-01 08:23:21 +01:00
23 lines
434 B
LLVM
23 lines
434 B
LLVM
; RUN: opt < %s -instsimplify -S | FileCheck %s
|
|
|
|
define i64 @pow2(i32 %x) {
|
|
; CHECK: @pow2
|
|
%negx = sub i32 0, %x
|
|
%x2 = and i32 %x, %negx
|
|
%e = zext i32 %x2 to i64
|
|
%nege = sub i64 0, %e
|
|
%e2 = and i64 %e, %nege
|
|
ret i64 %e2
|
|
; CHECK: ret i64 %e
|
|
}
|
|
|
|
define i64 @pow2b(i32 %x) {
|
|
; CHECK: @pow2b
|
|
%sh = shl i32 2, %x
|
|
%e = zext i32 %sh to i64
|
|
%nege = sub i64 0, %e
|
|
%e2 = and i64 %e, %nege
|
|
ret i64 %e2
|
|
; CHECK: ret i64 %e
|
|
}
|