mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-25 04:02:41 +01:00
18 lines
410 B
LLVM
18 lines
410 B
LLVM
|
; RUN: llc -march=x86-64 < %s | not grep negq
|
||
|
|
|
||
|
|
; These sequences don't need neg instructions; they can be done with
|
||
|
|
; a single shift and sub each.
|
||
|
|
|
||
|
|
define i64 @foo(i64 %x, i64 %y, i64 %n) nounwind {
|
||
|
|
%a = sub i64 0, %y
|
||
|
|
%b = shl i64 %a, %n
|
||
|
|
%c = add i64 %b, %x
|
||
|
|
ret i64 %c
|
||
|
|
}
|
||
|
|
define i64 @boo(i64 %x, i64 %y, i64 %n) nounwind {
|
||
|
|
%a = sub i64 0, %y
|
||
|
|
%b = shl i64 %a, %n
|
||
|
|
%c = add i64 %x, %b
|
||
|
|
ret i64 %c
|
||
|
|
}
|