mirror of
https://github.com/RPCSX/llvm.git
synced 2024-11-26 05:00:26 +00:00
cd9e155755
that SCEVExpander can produce when running on behalf of LSR. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93949 91177308-0d34-0410-b5e6-96231b3b80d8
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
|
|
}
|